array:25 [
  "pii" => "S2173511513000122"
  "issn" => "21735115"
  "doi" => "10.1016/j.rppnen.2013.02.001"
  "estado" => "S300"
  "fechaPublicacion" => "2013-03-01"
  "aid" => "124"
  "copyright" => "Sociedade Portuguesa de Pneumologia"
  "copyrightAnyo" => "2012"
  "documento" => "article"
  "crossmark" => 0
  "licencia" => "http://creativecommons.org/licenses/by-nc-nd/4.0/"
  "subdocumento" => "sco"
  "cita" => "Rev Port Pneumol. 2013;19:80-3"
  "abierto" => array:3 [
    "ES" => true
    "ES2" => true
    "LATM" => true
  ]
  "gratuito" => true
  "lecturas" => array:2 [
    "total" => 8626
    "formatos" => array:3 [
      "EPUB" => 261
      "HTML" => 6354
      "PDF" => 2011
    ]
  ]
  "Traduccion" => array:1 [
    "pt" => array:20 [
      "pii" => "S0873215912001432"
      "issn" => "08732159"
      "doi" => "10.1016/j.rppneu.2012.10.001"
      "estado" => "S300"
      "fechaPublicacion" => "2013-03-01"
      "aid" => "124"
      "copyright" => "Sociedade Portuguesa de Pneumologia"
      "documento" => "article"
      "crossmark" => 0
      "licencia" => "http://creativecommons.org/licenses/by-nc-nd/4.0/"
      "subdocumento" => "sco"
      "cita" => "Rev Port Pneumol. 2013;19:80-3"
      "abierto" => array:3 [
        "ES" => true
        "ES2" => true
        "LATM" => true
      ]
      "gratuito" => true
      "lecturas" => array:2 [
        "total" => 10483
        "formatos" => array:3 [
          "EPUB" => 242
          "HTML" => 8266
          "PDF" => 1975
        ]
      ]
      "pt" => array:13 [
        "idiomaDefecto" => true
        "cabecera" => "<span class="elsevierStyleTextfn">Caso cl&#237;nico</span>"
        "titulo" => "Urinot&#243;rax como causa rara de derrame pleural &#8211; Revisita&#231;&#227;o a prop&#243;sito de caso cl&#237;nico"
        "tienePdf" => "pt"
        "tieneTextoCompleto" => "pt"
        "tieneResumen" => array:2 [
          0 => "pt"
          1 => "en"
        ]
        "paginas" => array:1 [
          0 => array:2 [
            "paginaInicial" => "80"
            "paginaFinal" => "83"
          ]
        ]
        "titulosAlternativos" => array:1 [
          "en" => array:1 [
            "titulo" => "Urinothorax as an unusual type of pleural effusion &#8211; Clinical report and revisitation"
          ]
        ]
        "contieneResumen" => array:2 [
          "pt" => true
          "en" => true
        ]
        "contieneTextoCompleto" => array:1 [
          "pt" => true
        ]
        "contienePdf" => array:1 [
          "pt" => true
        ]
        "resumenGrafico" => array:2 [
          "original" => 0
          "multimedia" => array:7 [
            "identificador" => "fig0005"
            "etiqueta" => "Figura 1"
            "tipo" => "MULTIMEDIAFIGURA"
            "mostrarFloat" => true
            "mostrarDisplay" => false
            "figura" => array:1 [
              0 => array:4 [
                "imagen" => "gr1.jpeg"
                "Alto" => 553
                "Ancho" => 999
                "Tamanyo" => 60349
              ]
            ]
            "descripcion" => array:1 [
              "pt" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Primeira telerradiografia&#46;</p>"
            ]
          ]
        ]
        "autores" => array:1 [
          0 => array:2 [
            "autoresLista" => "P&#46;G&#46; Ferreira, F&#46; Furriel, A&#46;J&#46; Ferreira"
            "autores" => array:3 [
              0 => array:2 [
                "nombre" => "P&#46;G&#46;"
                "apellidos" => "Ferreira"
              ]
              1 => array:2 [
                "nombre" => "F&#46;"
                "apellidos" => "Furriel"
              ]
              2 => array:2 [
                "nombre" => "A&#46;J&#46;"
                "apellidos" => "Ferreira"
              ]
            ]
          ]
        ]
      ]
      "idiomaDefecto" => "pt"
      "Traduccion" => array:1 [
        "en" => array:9 [
          "pii" => "S2173511513000122"
          "doi" => "10.1016/j.rppnen.2013.02.001"
          "estado" => "S300"
          "subdocumento" => ""
          "abierto" => array:3 [
            "ES" => true
            "ES2" => true
            "LATM" => true
          ]
          "gratuito" => true
          "lecturas" => array:1 [
            "total" => 0
          ]
          "idiomaDefecto" => "en"
          "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2173511513000122?idApp=UINPBA00004E"
        ]
      ]
      "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S0873215912001432?idApp=UINPBA00004E"
      "url" => "/08732159/0000001900000002/v3_201509041430/S0873215912001432/v3_201509041430/pt/main.assets"
    ]
  ]
  "itemSiguiente" => array:20 [
    "pii" => "S217351151300016X"
    "issn" => "21735115"
    "doi" => "10.1016/j.rppnen.2013.02.005"
    "estado" => "S300"
    "fechaPublicacion" => "2013-03-01"
    "aid" => "123"
    "copyright" => "Sociedade Portuguesa de Pneumologia"
    "documento" => "article"
    "crossmark" => 0
    "licencia" => "http://creativecommons.org/licenses/by-nc-nd/4.0/"
    "subdocumento" => "sco"
    "cita" => "Rev Port Pneumol. 2013;19:84"
    "abierto" => array:3 [
      "ES" => true
      "ES2" => true
      "LATM" => true
    ]
    "gratuito" => true
    "lecturas" => array:2 [
      "total" => 3555
      "formatos" => array:3 [
        "EPUB" => 244
        "HTML" => 2260
        "PDF" => 1051
      ]
    ]
    "en" => array:10 [
      "idiomaDefecto" => true
      "cabecera" => "<span class="elsevierStyleTextfn">Photo</span>"
      "titulo" => "COPD patient&#58; Our failure against tobacco fight"
      "tienePdf" => "en"
      "tieneTextoCompleto" => "en"
      "paginas" => array:1 [
        0 => array:1 [
          "paginaInicial" => "84"
        ]
      ]
      "titulosAlternativos" => array:1 [
        "es" => array:1 [
          "titulo" => "Doente com DPOC&#58; a nossa fal&#234;ncia contra a luta anti-tab&#225;gica"
        ]
      ]
      "contieneTextoCompleto" => array:1 [
        "en" => true
      ]
      "contienePdf" => array:1 [
        "en" => true
      ]
      "autores" => array:1 [
        0 => array:2 [
          "autoresLista" => "E&#46; Gom&#233;z-Merino, P&#46; Landete, R&#46; Bravo-Fern&#225;ndez"
          "autores" => array:3 [
            0 => array:2 [
              "nombre" => "E&#46;"
              "apellidos" => "Gom&#233;z-Merino"
            ]
            1 => array:2 [
              "nombre" => "P&#46;"
              "apellidos" => "Landete"
            ]
            2 => array:2 [
              "nombre" => "R&#46;"
              "apellidos" => "Bravo-Fern&#225;ndez"
            ]
          ]
        ]
      ]
    ]
    "idiomaDefecto" => "en"
    "Traduccion" => array:1 [
      "pt" => array:9 [
        "pii" => "S0873215912001420"
        "doi" => "10.1016/j.rppneu.2012.11.001"
        "estado" => "S300"
        "subdocumento" => ""
        "abierto" => array:3 [
          "ES" => true
          "ES2" => true
          "LATM" => true
        ]
        "gratuito" => true
        "lecturas" => array:1 [
          "total" => 0
        ]
        "idiomaDefecto" => "pt"
        "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S0873215912001420?idApp=UINPBA00004E"
      ]
    ]
    "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S217351151300016X?idApp=UINPBA00004E"
    "url" => "/21735115/0000001900000002/v1_201305151603/S217351151300016X/v1_201305151603/en/main.assets"
  ]
  "itemAnterior" => array:19 [
    "pii" => "S2173511513000183"
    "issn" => "21735115"
    "doi" => "10.1016/j.rppnen.2013.02.007"
    "estado" => "S300"
    "fechaPublicacion" => "2013-03-01"
    "aid" => "127"
    "copyright" => "Sociedade Portuguesa de Pneumologia"
    "documento" => "article"
    "crossmark" => 0
    "licencia" => "http://creativecommons.org/licenses/by-nc-nd/4.0/"
    "subdocumento" => "sco"
    "cita" => "Rev Port Pneumol. 2013;19:76-9"
    "abierto" => array:3 [
      "ES" => true
      "ES2" => true
      "LATM" => true
    ]
    "gratuito" => true
    "lecturas" => array:2 [
      "total" => 4748
      "formatos" => array:3 [
        "EPUB" => 272
        "HTML" => 3074
        "PDF" => 1402
      ]
    ]
    "en" => array:12 [
      "idiomaDefecto" => true
      "cabecera" => "<span class="elsevierStyleTextfn">Case report</span>"
      "titulo" => "<span class="elsevierStyleItalic">Eikenella corrodens</span> and <span class="elsevierStyleItalic">Porphyromonas asaccharolytica</span> pleural empyema in a diabetic patient with obstructive sleep apnea syndrome on noninvasive ventilation"
      "tienePdf" => "en"
      "tieneTextoCompleto" => "en"
      "tieneResumen" => array:2 [
        0 => "en"
        1 => "pt"
      ]
      "paginas" => array:1 [
        0 => array:2 [
          "paginaInicial" => "76"
          "paginaFinal" => "79"
        ]
      ]
      "titulosAlternativos" => array:1 [
        "pt" => array:1 [
          "titulo" => "Empiema pleural por <span class="elsevierStyleItalic">Eikenella corrodens</span> e <span class="elsevierStyleItalic">Porphyromonas saccharolytica</span> numa doente diab&#233;tica sob ventila&#231;&#227;o n&#227;o invasiva por s&#237;ndrome de apneia obstrutiva do sono"
        ]
      ]
      "contieneResumen" => array:2 [
        "en" => true
        "pt" => true
      ]
      "contieneTextoCompleto" => array:1 [
        "en" => true
      ]
      "contienePdf" => array:1 [
        "en" => true
      ]
      "autores" => array:1 [
        0 => array:2 [
          "autoresLista" => "J&#46; Caiano Gil, R&#46; Calisto, J&#46; Amado, V&#46; Barreto"
          "autores" => array:4 [
            0 => array:2 [
              "nombre" => "J&#46;"
              "apellidos" => "Caiano Gil"
            ]
            1 => array:2 [
              "nombre" => "R&#46;"
              "apellidos" => "Calisto"
            ]
            2 => array:2 [
              "nombre" => "J&#46;"
              "apellidos" => "Amado"
            ]
            3 => array:2 [
              "nombre" => "V&#46;"
              "apellidos" => "Barreto"
            ]
          ]
        ]
      ]
    ]
    "idiomaDefecto" => "en"
    "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2173511513000183?idApp=UINPBA00004E"
    "url" => "/21735115/0000001900000002/v1_201305151603/S2173511513000183/v1_201305151603/en/main.assets"
  ]
  "en" => array:20 [
    "idiomaDefecto" => true
    "cabecera" => "<span class="elsevierStyleTextfn">Case report</span>"
    "titulo" => "Urinothorax as an unusual type of pleural effusion &#8211; Case report and review"
    "tieneTextoCompleto" => true
    "paginas" => array:1 [
      0 => array:2 [
        "paginaInicial" => "80"
        "paginaFinal" => "83"
      ]
    ]
    "autores" => array:1 [
      0 => array:4 [
        "autoresLista" => "P&#46;G&#46; Ferreira, F&#46; Furriel, A&#46;J&#46; Ferreira"
        "autores" => array:3 [
          0 => array:4 [
            "nombre" => "P&#46;G&#46;"
            "apellidos" => "Ferreira"
            "email" => array:1 [
              0 => "p&#95;goncalof&#64;hotmail&#46;com"
            ]
            "referencia" => array:2 [
              0 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">a</span>"
                "identificador" => "aff0005"
              ]
              1 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">¿</span>"
                "identificador" => "cor0005"
              ]
            ]
          ]
          1 => array:3 [
            "nombre" => "F&#46;"
            "apellidos" => "Furriel"
            "referencia" => array:1 [
              0 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">b</span>"
                "identificador" => "aff0010"
              ]
            ]
          ]
          2 => array:3 [
            "nombre" => "A&#46;J&#46;"
            "apellidos" => "Ferreira"
            "referencia" => array:1 [
              0 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">a</span>"
                "identificador" => "aff0005"
              ]
            ]
          ]
        ]
        "afiliaciones" => array:2 [
          0 => array:3 [
            "entidad" => "Pulmonology Department&#44; Coimbra University Hospital and Medical Faculty&#44; Coimbra&#44; Portugal"
            "etiqueta" => "<span class="elsevierStyleSup">a</span>"
            "identificador" => "aff0005"
          ]
          1 => array:3 [
            "entidad" => "Urology and Renal Transplantation Department&#44; Coimbra University Hospital and Medical Faculty&#44; Coimbra&#44; Portugal"
            "etiqueta" => "<span class="elsevierStyleSup">b</span>"
            "identificador" => "aff0010"
          ]
        ]
        "correspondencia" => array:1 [
          0 => array:3 [
            "identificador" => "cor0005"
            "etiqueta" => "&#8270;"
            "correspondencia" => "Corresponding author&#46;"
          ]
        ]
      ]
    ]
    "titulosAlternativos" => array:1 [
      "pt" => array:1 [
        "titulo" => "Urinot&#243;rax como causa rara de derrame pleural &#8211; Revisita&#231;&#227;o a prop&#243;sito de caso cl&#237;nico"
      ]
    ]
    "resumenGrafico" => array:2 [
      "original" => 0
      "multimedia" => array:7 [
        "identificador" => "fig0010"
        "etiqueta" => "Figure 2"
        "tipo" => "MULTIMEDIAFIGURA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "figura" => array:1 [
          0 => array:4 [
            "imagen" => "gr2.jpeg"
            "Alto" => 484
            "Ancho" => 1859
            "Tamanyo" => 112964
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">CT &#8211; left free pleural effusion and retroperitoneal fluid collection&#46;</p>"
        ]
      ]
    ]
    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Background</span><p id="par0005" class="elsevierStylePara elsevierViewall">The study of pleural effusion is not often straightforward and a significant percentage of effusions remain unclassified after the initial fluid study&#46; While there are a great variety of likely etiologies to consider initially&#44; there are also some cases that come from rare pathophysiological mechanisms&#44; in these cases we need to look for relevant clues from particular clinical contexts or potential iatrogenic interventions&#46; Urinothorax&#44; urine accumulation in the pleural space&#44; is an unusual cause of pleural effusion that is often overlooked&#59; fewer than 70 cases have been reported worldwide&#46; Although various leading mechanisms have been reported&#44; it most frequently develops in patients with kidney or excretory uropathy or blunt abdominal trauma&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">Traditionally&#44; a pleural fluid-to-serum creatinine ratio higher than one is a hallmark of this condition&#44; and there are some other features that can assist in this diagnosis&#46;<a class="elsevierStyleCrossRefs" href="#bib0005"><span class="elsevierStyleSup">1&#44;2</span></a></p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Case report</span><p id="par0015" class="elsevierStylePara elsevierViewall">A 77-year-old male patient&#44; with a history of obstructive chronic renal failure&#44; nephrolitiasis and chronic alcoholism but no previous respiratory disease&#44; was treated in the emergency department for recurrent macroscopic haematuria&#46; He had recently had a left ureteral catheter removed following a renal colic with evidence of radiolucent calculi and ipsilateral hydronephrosis&#46; He was admitted to the Urology ward&#44; and a right ureteral catheter was inserted and a percutaneous nephrostomy catheter positioned on the left side&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">On the sixth day after admission he was found to have a moderate size left pleural effusion&#46; Under clinical observation he was apyretic&#44; eupneic&#44; with SaO2 97&#37;&#44; blood pressure 108&#47;60<span class="elsevierStyleHsp" style=""></span>mmHg&#44; normal heart sounds&#44; 82<span class="elsevierStyleHsp" style=""></span>bpm&#44; with no murmurs<span class="elsevierStyleUnderline">&#59;</span> chest expansion was symmetric&#44; with no breath sounds and vocal fremitus on the left lung base&#44; and accompanying dullness to percussion&#59; there were no peripheral edemas or adenopathies&#46; He presented abdominal discomfort on the left iliac quadrant&#46; The left percutaneous nephrostomy catheter presented serous residual drainage&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">The patient did not present cough&#44; chest pain or ortopnea&#44; and was under standard thromboembolic prophylaxis&#46; He was medicated with losartan&#44; calcium&#44; epoetin-alpha&#44; alopurynol and tansulosin as an outpatient&#46; He had not been put on any other medication apart from the antibiotic and there was no recent known respiratory infection&#46; He had an occupational history of agriculture&#44; without recognizable asbestos exposure&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">The first chest radiograph &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41; presented an increased homogeneous opacification on the left lower hemithorax&#44; suggestive of a small to moderate-sized pleural effusion&#46; A contralateral T-tent hemidiaphragm was present&#46; Thoracic ultrasound showed a mobile effusion with no pleural nodules or thickening&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0035" class="elsevierStylePara elsevierViewall">Blood test showed a creatinine of 2&#46;4<span class="elsevierStyleHsp" style=""></span>mg&#47;dL &#40;patient&#39;s normal base value of 1&#46;7&#41;&#44; hypoalbuminaemia of 2&#46;0<span class="elsevierStyleHsp" style=""></span>g&#47;dL&#44; DHL 322<span class="elsevierStyleHsp" style=""></span>U&#47;L&#44; CRP 11&#46;2<span class="elsevierStyleHsp" style=""></span>mg&#47;dL&#44; procalcitonine 0&#46;2<span class="elsevierStyleHsp" style=""></span>mg&#47;dL&#44; hemoglobin 9&#46;4<span class="elsevierStyleHsp" style=""></span>g&#47;dL&#44; 5&#46;1<span class="elsevierStyleHsp" style=""></span>white cells&#47;L&#44; proteins 5&#46;3<span class="elsevierStyleHsp" style=""></span>g&#47;dL&#44; and normal serum amylase and amylasuria&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">Prior to the pleural fluid study there had been several possible etiologies&#44; such as cardiogenic effusion&#44; parapneumonic or tuberculous effusion&#44; malignancy&#44; thromboembolic-related effusion&#44; uremic pleurisy and urinothorax&#46; A first diagnostic thoracocentesis collected 200<span class="elsevierStyleHsp" style=""></span>mL of citrine-yellow transudative fluid for initial workup &#40;pH 7&#46;7&#44; proteins 2&#46;9<span class="elsevierStyleHsp" style=""></span>g&#47;dL&#44; albumin 1&#46;4<span class="elsevierStyleHsp" style=""></span>g&#47;dL&#44; glucose 86<span class="elsevierStyleHsp" style=""></span>mg&#47;dL&#44; LDH 200<span class="elsevierStyleHsp" style=""></span>U&#47;L&#44; microbiologically and cytopathologically negative&#41;&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">The following week the effusion progressed&#46; A second thoracocentesis drained about 550<span class="elsevierStyleHsp" style=""></span>mL of clear citrine fluid&#44; this time with a noticeable ammonia odor&#44; and a broader workup testing was arranged&#46; Pleural fluid analysis presented a normal pH &#40;although it had to be measured by strip due to the potentiometer malfunction&#41;&#44; total proteins of 3&#46;0<span class="elsevierStyleHsp" style=""></span>g&#47;dL&#44; glucose 120<span class="elsevierStyleHsp" style=""></span>mg&#47;dL&#44; albumin 1&#46;4<span class="elsevierStyleHsp" style=""></span>g&#47;dL&#44; DHL 197&#44; creatinine 2&#46;92<span class="elsevierStyleHsp" style=""></span>mg&#47;dL&#44; triglycerides 36<span class="elsevierStyleHsp" style=""></span>mg&#47;dL&#44; amylase 28<span class="elsevierStyleHsp" style=""></span>U&#47;L&#59; ADA 9&#46;0<span class="elsevierStyleHsp" style=""></span>U&#47;L&#59; estimated protein gradient was 0&#46;57&#44; DHL ratio 0&#46;61&#44; and creatinine pleural-to-serum ratio of 1&#46;21&#46; Total cellularity was 300<span class="elsevierStyleHsp" style=""></span>cells&#47;&#956;L&#44; with 16&#37; lymphocytes&#44; 5&#37; neutrophils and 78&#37; mesothelial cells&#46; Cytopathological and microbiological studies were&#44; again&#44; negative&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">The CT undertaken &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41; presented&#58; a left moderate free pleural effusion&#59; normal pulmonary angiography and no mediastinal&#47;hilar adenopathies&#59; a left atrophic kidney with the percutaneous nephrostomy catheter and a retroperitoneal and perinephric collection&#44; with some areas of low density while others were high&#44; consistent with the presence of a retroperitoneal urinoma with some interspected areas of hematoma&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0055" class="elsevierStylePara elsevierViewall">The patient underwent a left nephrectomy with progressive resolution of the pleural effusion in the early post-operative period&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Discussion</span><p id="par0060" class="elsevierStylePara elsevierViewall">The left pleural presence of urine was recognized in our patient&#46; Urinothorax most commonly develops after obstructive uropathy with hydronephrosis or traumatic diaphragmatic disruption by blunt abdominal trauma&#46;<a class="elsevierStyleCrossRefs" href="#bib0015"><span class="elsevierStyleSup">3&#44;4</span></a> In the first case&#44; it occurs either by thoracic urinary lymphatic ascension &#40;through reabsorption and lymphatic drainage of extravasated urine from retroperitoneal urinomas&#41;&#44; or by a mechanism of direct transdiaphragmatic passage from those collections to the pleural cavity&#46; Other etiologies have been described such as&#58; retroperitoneal inflammatory processes&#59; percutaneous endoscopic renal procedures&#59; polycystic renal disease&#59; ureteral valves&#59; extracorporeal lithotripsy&#59; or intra-abdominal compression from gravid uterus or lymphomatous masses&#46;<a class="elsevierStyleCrossRefs" href="#bib0025"><span class="elsevierStyleSup">5&#8211;9</span></a></p><p id="par0065" class="elsevierStylePara elsevierViewall">In our case&#44; there were two simultaneous etiological factors to consider&#58; the well documented obstructive uropathy with retroperitoneal urinary leakage&#59; and the percutaneous nephrostomy placement at the time of admission&#46; Though&#44; in the latter case&#44; no traumatic misplacement was recognized&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">This unusual type of pleural effusion is frequently unilateral&#44; of small-to-moderate volume and ipsilateral to the urinary obstructed tract&#46;<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">10</span></a> Although classically known as a transudate&#44; on rare occasions it can present as an exudate&#46;<a class="elsevierStyleCrossRefs" href="#bib0010"><span class="elsevierStyleSup">2&#44;11</span></a></p><p id="par0075" class="elsevierStylePara elsevierViewall">The fluid is normally clear and yellow&#44; with a distinctive ammonia odor&#44; with low protein content and normal to high LDH&#46; There have also been reports of Low pH and glucose levels&#44; but these are unreliable markers and may not always be present&#46;<a class="elsevierStyleCrossRefs" href="#bib0035"><span class="elsevierStyleSup">7&#44;11&#44;12</span></a></p><p id="par0080" class="elsevierStylePara elsevierViewall">The patognomonic feature is a pleural fluid-to-serum creatinine ratio always above one&#44; although some variability has been reported&#44; depending on the stage of evolution&#46; Microbiological and cytopathological studies must be negative&#46; In less typical situations or where there is low clinical suspicion of urinothorax&#44; patients with recurrent effusions of undetermined etiology might undergo medical thoracoscopy&#46;</p><p id="par0085" class="elsevierStylePara elsevierViewall">On CT imaging&#44; perirenal urinomas&#44; renal or other excretory tract pathology and extravasation of contrast-enhanced urine to the retroperitoneum or pleural space&#44; are the most common features&#46;<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">13</span></a> Renal scans can also be valuable indicators of the presence of urinopleural fistula&#46; Today&#44; MAG-3 renal scans are preferred over the Tc-99m labeled diethylenetriamine pentaacetic acid &#40;DTPA&#41;&#46; Some authors suggest that&#44; when a therapeutic intervention is possible&#44; invasive studies like retrograde pyelogram and endoscopy of the renal collecting system&#44; might be justified&#46;<a class="elsevierStyleCrossRefs" href="#bib0065"><span class="elsevierStyleSup">13&#44;14</span></a></p><p id="par0090" class="elsevierStylePara elsevierViewall">Treatment is specifically directed to the correction of the primary cause and drainage of the fluid&#46; In our case&#44; as is normally the case&#44; the relief of the urinary tract obstruction led to the progressive resolution of the effusion&#46; The decision for nephrectomy was already being proposed by the Urology team as a better option than an ultrasound-guided drainage of the urinoma&#46; The following elements were taken into consideration&#58; the patient had had recurrent episodes of high tract lithiasic obstruction&#44; with a strong tendency for sepsis&#59; an only marginally functioning left kidney&#59; and a recent confirmation of retroperitoneal leakage&#44; even with nephrostomy&#44; along with a persistent urinothorax as a new complication&#46;</p><p id="par0095" class="elsevierStylePara elsevierViewall">Simple tube thoracostomy is advised for large effusions and for patients where the symptoms are very clear&#46; In case of asymptomatology or minor symptoms&#44; it is reasonable to perform drainage by needle thoracocentesis because with most patients the urinothorax will clear-up after the primary obstruction is relieved&#46;<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">13</span></a></p><p id="par0100" class="elsevierStylePara elsevierViewall">The recurrence of an urinothorax is a strong pointer toward an inadequately drained collecting system&#44; which needs further study and to be treated aggressively&#46; In a few cases&#44; a persistent urinothorax may involve the surgical correction of concealed tears in the urinary system&#44; renopleural fistulas or even nephrectomy&#44; as described above&#46; There have been no reports of persistent urinothorax requiring surgical management involving the diaphragm or thoracic cavity so&#44; as recommended by Wey et al&#46;&#44; the threshold for referring a patient for video-assisted thoracoscopic surgery &#40;VATS&#41; should therefore be high&#46;<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">13</span></a></p><p id="par0105" class="elsevierStylePara elsevierViewall">This kind of etiology may easily go undiagnosed&#46; In patients with pleural effusion and a current&#47;recent urinary tract disorder it should be seriously considered&#46;<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">15</span></a> Ideally these patients are best managed by a multidisciplinary team including an urologist<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">13</span></a> and a pulmonologist&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Ethical disclosures</span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Protection of human and animal subjects</span><p id="par0110" class="elsevierStylePara elsevierViewall">The authors declare that no experiments were performed on humans or animals for this study&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Confidentiality of data</span><p id="par0115" class="elsevierStylePara elsevierViewall">The authors declare that they have followed the protocols of their work center on the publication of patient data and that all the patients included in the study received sufficient information and gave their written informed consent to participate in the study&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Right to privacy and informed consent</span><p id="par0120" class="elsevierStylePara elsevierViewall">The authors have obtained the written informed consent of the patients or subjects mentioned in the article&#46; The corresponding author is in possession of this document&#46;</p></span></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle">Conflicts of interest</span><p id="par0125" class="elsevierStylePara elsevierViewall">The authors have no conflicts of interest to declare&#46;</p></span></span>"
    "textoCompletoSecciones" => array:1 [
      "secciones" => array:10 [
        0 => array:2 [
          "identificador" => "xres175793"
          "titulo" => array:4 [
            0 => "Abstract"
            1 => "Background"
            2 => "Clinical case"
            3 => "Conclusions"
          ]
        ]
        1 => array:2 [
          "identificador" => "xpalclavsec164126"
          "titulo" => "Keywords"
        ]
        2 => array:2 [
          "identificador" => "xres175792"
          "titulo" => array:4 [
            0 => "Resumo"
            1 => "Contexto"
            2 => "Caso cl&#237;nico"
            3 => "Conclus&#245;es"
          ]
        ]
        3 => array:2 [
          "identificador" => "xpalclavsec164127"
          "titulo" => "Palavras-chave"
        ]
        4 => array:2 [
          "identificador" => "sec0005"
          "titulo" => "Background"
        ]
        5 => array:2 [
          "identificador" => "sec0045"
          "titulo" => "Case report"
        ]
        6 => array:2 [
          "identificador" => "sec0015"
          "titulo" => "Discussion"
        ]
        7 => array:3 [
          "identificador" => "sec0020"
          "titulo" => "Ethical disclosures"
          "secciones" => array:3 [
            0 => array:2 [
              "identificador" => "sec0025"
              "titulo" => "Protection of human and animal subjects"
            ]
            1 => array:2 [
              "identificador" => "sec0030"
              "titulo" => "Confidentiality of data"
            ]
            2 => array:2 [
              "identificador" => "sec0035"
              "titulo" => "Right to privacy and informed consent"
            ]
          ]
        ]
        8 => array:2 [
          "identificador" => "sec0040"
          "titulo" => "Conflicts of interest"
        ]
        9 => array:1 [
          "titulo" => "References"
        ]
      ]
    ]
    "pdfFichero" => "main.pdf"
    "tienePdf" => true
    "fechaRecibido" => "2012-05-22"
    "fechaAceptado" => "2012-10-17"
    "PalabrasClave" => array:2 [
      "en" => array:1 [
        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Keywords"
          "identificador" => "xpalclavsec164126"
          "palabras" => array:3 [
            0 => "Urinothorax"
            1 => "Pleural effusion"
            2 => "Obstructive uropathy"
          ]
        ]
      ]
      "pt" => array:1 [
        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Palavras-chave"
          "identificador" => "xpalclavsec164127"
          "palabras" => array:3 [
            0 => "Urinot&#243;rax"
            1 => "Derrame pleural"
            2 => "Uropatia obstrutiva"
          ]
        ]
      ]
    ]
    "tieneResumen" => true
    "resumen" => array:2 [
      "en" => array:2 [
        "titulo" => "Abstract"
        "resumen" => "<span class="elsevierStyleSectionTitle">Background</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Despite the fact that there are a great number of established etiologies for pleural effusion&#44; there are grounds for believing that there are also causes from unusual pathophysiological mechanisms&#44; seen in certain clinical contexts and from potential iatrogenic interventions&#46; Urinothorax is such a rare type of pleural effusion as there are fewer than 70 cases reported worldwide&#46;</p> <span class="elsevierStyleSectionTitle">Clinical case</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">A patient with a persistent left pleural effusion was admitted to the Urology ward for a lithiasic obstructive uropathy with hydronephrosis&#46; A left percutaneous nephrostomy was performed&#46; The effusion was unclassified at the initial workup and recurred after first drainage&#46; A second approach confirmed a citrine fluid with borderline criteria for exudate&#44; ammoniacal odor and an elusive pleural fluid-to-serum creatinine ratio&#46; A retroperitoneal urinoma was recognized on CT&#44; and the patient underwent a left nephrectomy with resolution of the pleural effusion&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Urinothorax most frequently develops in patients with excretory uropathy or blunt abdominal trauma&#44; although other mechanisms have been reported&#46; Traditionally&#44; a pleural fluid to serum creatinine ratio higher than one is a hallmark of this condition&#46; In certain settings&#44; taking this diagnosis into account at an early stage might be crucial for a good outcome&#46;</p>"
      ]
      "pt" => array:2 [
        "titulo" => "Resumo"
        "resumen" => "<span class="elsevierStyleSectionTitle">Contexto</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Apesar da multitude de etiologias de derrame pleural&#44; algumas causas decorrentes de mecanismos patofisiol&#243;gicos incomuns podem ser suspeitadas com base em determinados contextos cl&#237;nicos sugestivos ou interven&#231;&#245;es com potencial iatrog&#233;nico&#46; O urinot&#243;rax &#233; um tipo raro de derrame pleural com menos de 70 casos mundialmente reportados&#46;</p> <span class="elsevierStyleSectionTitle">Caso cl&#237;nico</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Um doente que fora internado na Urologia por uropatia obstrutiva liti&#225;sica com hidronefrose&#44; &#233; diagnosticado com derrame pleural esquerdo persistente&#46; Havia sido sujeito &#224; coloca&#231;&#227;o ipsilateral de nefrostomia percut&#226;nea&#46; Ap&#243;s a primeira toracocentese diagn&#243;stica a causa do derrame n&#227;o era aparente&#46; Uma segunda abordagem confirmou a presen&#231;a de l&#237;quido citrino com crit&#233;rios <span class="elsevierStyleItalic">borderline</span> para exsudato&#44; odor amoniacal t&#237;pico e um <span class="elsevierStyleItalic">ratio</span> evocativo entre creatinina pleural e s&#233;rica&#46; A tomografia computorizada &#40;TC&#41; realizada diagnosticou presen&#231;a de urinoma retroperitoneal&#44; tendo o doente sido submetido a nefrectomia esquerda com resolu&#231;&#227;o do derrame pleural&#46;</p> <span class="elsevierStyleSectionTitle">Conclus&#245;es</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">O urinot&#243;rax encontra-se mais frequentemente em doentes com uropatia excretora ou trauma abdominal contuso&#44; apesar de outros poss&#237;veis mecanismos j&#225; reportados&#46; Tradicionalmente&#44; um <span class="elsevierStyleItalic">ratio</span> de creatinina pleural&#47;s&#233;rica superior a um &#233; um tra&#231;o distintivo desta condi&#231;&#227;o&#46; Em determinados contextos&#44; a considera&#231;&#227;o desta possibilidade diagn&#243;stica pode ser determinante para um melhor progn&#243;stico final&#46;</p>"
      ]
    ]
    "NotaPie" => array:1 [
      0 => array:2 [
        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara">Please cite this article as&#58; Ferreira PG&#44; et al&#46; Urinot&#243;rax como causa rara de derrame pleural &#8211; Revisita&#231;&#227;o a prop&#243;sito de caso cl&#237;nico&#46; Rev Port Pneumol&#46; 2013&#46; <span class="elsevierStyleInterRef" href="doi:10.1016/j.rppneu.2012.10.001">http&#58;&#47;&#47;dx&#46;doi&#46;org&#47;10&#46;1016&#47;j&#46;rppneu&#46;2012&#46;10&#46;001</span>&#46;</p>"
      ]
    ]
    "multimedia" => array:2 [
      0 => array:7 [
        "identificador" => "fig0005"
        "etiqueta" => "Figure 1"
        "tipo" => "MULTIMEDIAFIGURA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "figura" => array:1 [
          0 => array:4 [
            "imagen" => "gr1.jpeg"
            "Alto" => 553
            "Ancho" => 999
            "Tamanyo" => 60349
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Chest radiograph at first observation&#46;</p>"
        ]
      ]
      1 => array:7 [
        "identificador" => "fig0010"
        "etiqueta" => "Figure 2"
        "tipo" => "MULTIMEDIAFIGURA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "figura" => array:1 [
          0 => array:4 [
            "imagen" => "gr2.jpeg"
            "Alto" => 484
            "Ancho" => 1859
            "Tamanyo" => 112964
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">CT &#8211; left free pleural effusion and retroperitoneal fluid collection&#46;</p>"
        ]
      ]
    ]
    "bibliografia" => array:2 [
      "titulo" => "References"
      "seccion" => array:1 [
        0 => array:2 [
          "identificador" => "bibs0005"
          "bibliografiaReferencia" => array:15 [
            0 => array:3 [
              "identificador" => "bib0005"
              "etiqueta" => "1"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Biochemical features of urinothorax"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:4 [
                            0 => "D&#46;D&#46; Stark"
                            1 => "J&#46;G&#46; Shanes"
                            2 => "R&#46;L&#46; Baron"
                            3 => "D&#46;D&#46; Koch"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Arch Intern Med"
                        "fecha" => "1982"
                        "volumen" => "142"
                        "paginaInicial" => "1509"
                        "paginaFinal" => "1511"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/7103632"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            1 => array:3 [
              "identificador" => "bib0010"
              "etiqueta" => "2"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Urinothorax&#58; case report and review of the literature with emphasis on biochemical diagnosis"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "E&#46; Garcia-Pachon"
                            1 => "I&#46; Padilla-Navas"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1159/000080642"
                      "Revista" => array:6 [
                        "tituloSerie" => "Respiration"
                        "fecha" => "2004"
                        "volumen" => "71"
                        "paginaInicial" => "533"
                        "paginaFinal" => "536"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/15467335"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            2 => array:3 [
              "identificador" => "bib0015"
              "etiqueta" => "3"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Pleural effusion associated with urinary tract obstruction&#58; support for a hypothesis"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "F&#46;W&#46; Leung"
                            1 => "A&#46;J&#46; Williams"
                            2 => "P&#46;A&#46; Oill"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:7 [
                        "tituloSerie" => "Thorax"
                        "fecha" => "1981"
                        "volumen" => "36"
                        "paginaInicial" => "632"
                        "paginaFinal" => "633"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/7314037"
                            "web" => "Medline"
                          ]
                        ]
                        "itemHostRev" => array:3 [
                          "pii" => "S0168827809003213"
                          "estado" => "S300"
                          "issn" => "01688278"
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            3 => array:3 [
              "identificador" => "bib0020"
              "etiqueta" => "4"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Blunt abdominal trauma resulting in urinothorax from a missed uretero-pelvic junction avulsion&#58; case report"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "U&#46; Parvathy"
                            1 => "R&#46; Saldanha"
                            2 => "K&#46;R&#46; Balakrishnan"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1097/01.TA.0000033499.29332.9B"
                      "Revista" => array:6 [
                        "tituloSerie" => "J Trauma"
                        "fecha" => "2003"
                        "volumen" => "54"
                        "paginaInicial" => "187"
                        "paginaFinal" => "189"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/12544917"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            4 => array:3 [
              "identificador" => "bib0025"
              "etiqueta" => "5"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Pulmonary complications of percutaneous nephrostomy and kidney stone extraction"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:4 [
                            0 => "A&#46; O&#8217;Donnell"
                            1 => "C&#46; Schoenberger"
                            2 => "J&#46; Weiner"
                            3 => "E&#46; Tsou"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "South Med J"
                        "fecha" => "1988"
                        "volumen" => "81"
                        "paginaInicial" => "1002"
                        "paginaFinal" => "1005"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/3406782"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            5 => array:3 [
              "identificador" => "bib0030"
              "etiqueta" => "6"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Urinothorax&#58; an unexpected cause of pleural effusion in a patient with non-Hodgkin lymphoma"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:6 [
                            0 => "K&#46; Karkoulias"
                            1 => "F&#46; Sampsonas"
                            2 => "A&#46; Kaparianos"
                            3 => "M&#46; Tsiamita"
                            4 => "G&#46; Tsoukalas"
                            5 => "K&#46; Spiropoulos"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Eur Rev Med Pharmacol Sci"
                        "fecha" => "2007"
                        "volumen" => "11"
                        "paginaInicial" => "373"
                        "paginaFinal" => "374"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/18306905"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            6 => array:3 [
              "identificador" => "bib0035"
              "etiqueta" => "7"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Urinothorax&#58; a new approach"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "E&#46; Garcia-Pachon"
                            1 => "S&#46; Romero"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1097/01.mcp.0000230628.65515.86"
                      "Revista" => array:6 [
                        "tituloSerie" => "Curr Opin Pulm Med"
                        "fecha" => "2006"
                        "volumen" => "12"
                        "paginaInicial" => "259"
                        "paginaFinal" => "263"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/16825877"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            7 => array:3 [
              "identificador" => "bib0040"
              "etiqueta" => "8"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Urinothorax&#58; report of 4 cases and review of the literature"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:1 [
                            0 => "J&#46;R&#46; Salcedo"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "J Urol"
                        "fecha" => "1986"
                        "volumen" => "135"
                        "paginaInicial" => "805"
                        "paginaFinal" => "808"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/3514964"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            8 => array:3 [
              "identificador" => "bib0045"
              "etiqueta" => "9"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "An unusual cause of urinothorax"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:6 [
                            0 => "I&#46;K&#46; O&#287;uz&#252;lgen"
                            1 => "A&#46;I&#46; O&#287;uz&#252;lgen"
                            2 => "Z&#46; Sinik"
                            3 => "O&#46; K&#246;kt&#252;rk"
                            4 => "N&#46; Ekim"
                            5 => "U&#46; Karao&#287;lan"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "63633"
                      "Revista" => array:6 [
                        "tituloSerie" => "Respiration"
                        "fecha" => "2002"
                        "volumen" => "69"
                        "paginaInicial" => "273"
                        "paginaFinal" => "274"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/12097774"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            9 => array:3 [
              "identificador" => "bib0050"
              "etiqueta" => "10"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Transudative pleural effusions"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:1 [
                            0 => "R&#46;W&#46; Light"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Libro" => array:5 [
                        "edicion" => "3rd ed&#46;"
                        "titulo" => "Pleural diseases"
                        "fecha" => "1995"
                        "editorial" => "Williams &#38; Wilkins"
                        "editorialLocalizacion" => "Baltimore"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            10 => array:3 [
              "identificador" => "bib0055"
              "etiqueta" => "11"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Urinothorax&#58; presentation of a new case as pleural exudate"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:4 [
                            0 => "R&#46;B&#46; Mora"
                            1 => "C&#46;M&#46; Silvente"
                            2 => "J&#46;M&#46; Nieto"
                            3 => "M&#46;A&#46; Cuervo"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1097/SMJ.0b013e3181e9a38a"
                      "Revista" => array:6 [
                        "tituloSerie" => "South Med J"
                        "fecha" => "2010"
                        "volumen" => "103"
                        "paginaInicial" => "931"
                        "paginaFinal" => "933"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/20689489"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            11 => array:3 [
              "identificador" => "bib0060"
              "etiqueta" => "12"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Biochemical features of urinothorax"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:4 [
                            0 => "D&#46;D&#46; Stark"
                            1 => "J&#46;G&#46; Shades"
                            2 => "R&#46;L&#46; Baron"
                            3 => "D&#46;D&#46; Koch"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Arch Intern Med"
                        "fecha" => "1982"
                        "volumen" => "142"
                        "paginaInicial" => "1509"
                        "paginaFinal" => "1511"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/7103632"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            12 => array:3 [
              "identificador" => "bib0065"
              "etiqueta" => "13"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Urinothorax&#58; an uncommon cause of pleural effusion"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "B&#46; Wei"
                            1 => "H&#46; Takayama"
                            2 => "M&#46; Bacchetta"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:5 [
                        "tituloSerie" => "Respir Med CME"
                        "fecha" => "2009"
                        "volumen" => "2"
                        "paginaInicial" => "179"
                        "paginaFinal" => "180"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            13 => array:3 [
              "identificador" => "bib0070"
              "etiqueta" => "14"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Evaluation of Tc-99m mercaptoacetyltriglycine in patients with impaired renal function"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:4 [
                            0 => "A&#46; Taylor Jr&#46;"
                            1 => "D&#46; Eshima"
                            2 => "P&#46;E&#46; Christian"
                            3 => "W&#46; Milton"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1148/radiology.162.2.2948212"
                      "Revista" => array:6 [
                        "tituloSerie" => "Radiology"
                        "fecha" => "1987"
                        "volumen" => "162"
                        "paginaInicial" => "365"
                        "paginaFinal" => "370"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/2948212"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            14 => array:3 [
              "identificador" => "bib0075"
              "etiqueta" => "15"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Pleural effusion due to pyelonephritis or urinothorax&#63;"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "E&#46; Garcia-Pachon"
                            1 => "I&#46; Padilla-Navas"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:5 [
                        "tituloSerie" => "Respiration"
                        "fecha" => "1997"
                        "volumen" => "64"
                        "paginaInicial" => "392"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/9311060"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
          ]
        ]
      ]
    ]
  ]
  "idiomaDefecto" => "en"
  "url" => "/21735115/0000001900000002/v1_201305151603/S2173511513000122/v1_201305151603/en/main.assets"
  "Apartado" => array:4 [
    "identificador" => "9711"
    "tipo" => "SECCION"
    "en" => array:2 [
      "titulo" => "Case reports"
      "idiomaDefecto" => true
    ]
    "idiomaDefecto" => "en"
  ]
  "PDF" => "https://static.elsevier.es/multimedia/21735115/0000001900000002/v1_201305151603/S2173511513000122/v1_201305151603/en/main.pdf?idApp=UINPBA00004E&text.app=https://journalpulmonology.org/"
  "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2173511513000122?idApp=UINPBA00004E"
]
Share
Journal Information
Vol. 19. Issue 2.
Pages 80-83 (March - April 2013)
Visits
1172
Vol. 19. Issue 2.
Pages 80-83 (March - April 2013)
Case report
Open Access
Urinothorax as an unusual type of pleural effusion – Case report and review
Urinotórax como causa rara de derrame pleural – Revisitação a propósito de caso clínico
Visits
1172
P.G. Ferreiraa,
Corresponding author
p_goncalof@hotmail.com

Corresponding author.
, F. Furrielb, A.J. Ferreiraa
a Pulmonology Department, Coimbra University Hospital and Medical Faculty, Coimbra, Portugal
b Urology and Renal Transplantation Department, Coimbra University Hospital and Medical Faculty, Coimbra, Portugal
This item has received

Under a Creative Commons license
Article information
Abstract
Full Text
Bibliography
Download PDF
Statistics
Figures (2)
Abstract
Background

Despite the fact that there are a great number of established etiologies for pleural effusion, there are grounds for believing that there are also causes from unusual pathophysiological mechanisms, seen in certain clinical contexts and from potential iatrogenic interventions. Urinothorax is such a rare type of pleural effusion as there are fewer than 70 cases reported worldwide.

Clinical case

A patient with a persistent left pleural effusion was admitted to the Urology ward for a lithiasic obstructive uropathy with hydronephrosis. A left percutaneous nephrostomy was performed. The effusion was unclassified at the initial workup and recurred after first drainage. A second approach confirmed a citrine fluid with borderline criteria for exudate, ammoniacal odor and an elusive pleural fluid-to-serum creatinine ratio. A retroperitoneal urinoma was recognized on CT, and the patient underwent a left nephrectomy with resolution of the pleural effusion.

Conclusions

Urinothorax most frequently develops in patients with excretory uropathy or blunt abdominal trauma, although other mechanisms have been reported. Traditionally, a pleural fluid to serum creatinine ratio higher than one is a hallmark of this condition. In certain settings, taking this diagnosis into account at an early stage might be crucial for a good outcome.

Keywords:
Urinothorax
Pleural effusion
Obstructive uropathy
Resumo
Contexto

Apesar da multitude de etiologias de derrame pleural, algumas causas decorrentes de mecanismos patofisiológicos incomuns podem ser suspeitadas com base em determinados contextos clínicos sugestivos ou intervenções com potencial iatrogénico. O urinotórax é um tipo raro de derrame pleural com menos de 70 casos mundialmente reportados.

Caso clínico

Um doente que fora internado na Urologia por uropatia obstrutiva litiásica com hidronefrose, é diagnosticado com derrame pleural esquerdo persistente. Havia sido sujeito à colocação ipsilateral de nefrostomia percutânea. Após a primeira toracocentese diagnóstica a causa do derrame não era aparente. Uma segunda abordagem confirmou a presença de líquido citrino com critérios borderline para exsudato, odor amoniacal típico e um ratio evocativo entre creatinina pleural e sérica. A tomografia computorizada (TC) realizada diagnosticou presença de urinoma retroperitoneal, tendo o doente sido submetido a nefrectomia esquerda com resolução do derrame pleural.

Conclusões

O urinotórax encontra-se mais frequentemente em doentes com uropatia excretora ou trauma abdominal contuso, apesar de outros possíveis mecanismos já reportados. Tradicionalmente, um ratio de creatinina pleural/sérica superior a um é um traço distintivo desta condição. Em determinados contextos, a consideração desta possibilidade diagnóstica pode ser determinante para um melhor prognóstico final.

Palavras-chave:
Urinotórax
Derrame pleural
Uropatia obstrutiva
Full Text
Background

The study of pleural effusion is not often straightforward and a significant percentage of effusions remain unclassified after the initial fluid study. While there are a great variety of likely etiologies to consider initially, there are also some cases that come from rare pathophysiological mechanisms, in these cases we need to look for relevant clues from particular clinical contexts or potential iatrogenic interventions. Urinothorax, urine accumulation in the pleural space, is an unusual cause of pleural effusion that is often overlooked; fewer than 70 cases have been reported worldwide. Although various leading mechanisms have been reported, it most frequently develops in patients with kidney or excretory uropathy or blunt abdominal trauma.

Traditionally, a pleural fluid-to-serum creatinine ratio higher than one is a hallmark of this condition, and there are some other features that can assist in this diagnosis.1,2

Case report

A 77-year-old male patient, with a history of obstructive chronic renal failure, nephrolitiasis and chronic alcoholism but no previous respiratory disease, was treated in the emergency department for recurrent macroscopic haematuria. He had recently had a left ureteral catheter removed following a renal colic with evidence of radiolucent calculi and ipsilateral hydronephrosis. He was admitted to the Urology ward, and a right ureteral catheter was inserted and a percutaneous nephrostomy catheter positioned on the left side.

On the sixth day after admission he was found to have a moderate size left pleural effusion. Under clinical observation he was apyretic, eupneic, with SaO2 97%, blood pressure 108/60mmHg, normal heart sounds, 82bpm, with no murmurs; chest expansion was symmetric, with no breath sounds and vocal fremitus on the left lung base, and accompanying dullness to percussion; there were no peripheral edemas or adenopathies. He presented abdominal discomfort on the left iliac quadrant. The left percutaneous nephrostomy catheter presented serous residual drainage.

The patient did not present cough, chest pain or ortopnea, and was under standard thromboembolic prophylaxis. He was medicated with losartan, calcium, epoetin-alpha, alopurynol and tansulosin as an outpatient. He had not been put on any other medication apart from the antibiotic and there was no recent known respiratory infection. He had an occupational history of agriculture, without recognizable asbestos exposure.

The first chest radiograph (Fig. 1) presented an increased homogeneous opacification on the left lower hemithorax, suggestive of a small to moderate-sized pleural effusion. A contralateral T-tent hemidiaphragm was present. Thoracic ultrasound showed a mobile effusion with no pleural nodules or thickening.

Figure 1.

Chest radiograph at first observation.

(0.06MB).

Blood test showed a creatinine of 2.4mg/dL (patient's normal base value of 1.7), hypoalbuminaemia of 2.0g/dL, DHL 322U/L, CRP 11.2mg/dL, procalcitonine 0.2mg/dL, hemoglobin 9.4g/dL, 5.1white cells/L, proteins 5.3g/dL, and normal serum amylase and amylasuria.

Prior to the pleural fluid study there had been several possible etiologies, such as cardiogenic effusion, parapneumonic or tuberculous effusion, malignancy, thromboembolic-related effusion, uremic pleurisy and urinothorax. A first diagnostic thoracocentesis collected 200mL of citrine-yellow transudative fluid for initial workup (pH 7.7, proteins 2.9g/dL, albumin 1.4g/dL, glucose 86mg/dL, LDH 200U/L, microbiologically and cytopathologically negative).

The following week the effusion progressed. A second thoracocentesis drained about 550mL of clear citrine fluid, this time with a noticeable ammonia odor, and a broader workup testing was arranged. Pleural fluid analysis presented a normal pH (although it had to be measured by strip due to the potentiometer malfunction), total proteins of 3.0g/dL, glucose 120mg/dL, albumin 1.4g/dL, DHL 197, creatinine 2.92mg/dL, triglycerides 36mg/dL, amylase 28U/L; ADA 9.0U/L; estimated protein gradient was 0.57, DHL ratio 0.61, and creatinine pleural-to-serum ratio of 1.21. Total cellularity was 300cells/μL, with 16% lymphocytes, 5% neutrophils and 78% mesothelial cells. Cytopathological and microbiological studies were, again, negative.

The CT undertaken (Fig. 2) presented: a left moderate free pleural effusion; normal pulmonary angiography and no mediastinal/hilar adenopathies; a left atrophic kidney with the percutaneous nephrostomy catheter and a retroperitoneal and perinephric collection, with some areas of low density while others were high, consistent with the presence of a retroperitoneal urinoma with some interspected areas of hematoma.

Figure 2.

CT – left free pleural effusion and retroperitoneal fluid collection.

(0.11MB).

The patient underwent a left nephrectomy with progressive resolution of the pleural effusion in the early post-operative period.

Discussion

The left pleural presence of urine was recognized in our patient. Urinothorax most commonly develops after obstructive uropathy with hydronephrosis or traumatic diaphragmatic disruption by blunt abdominal trauma.3,4 In the first case, it occurs either by thoracic urinary lymphatic ascension (through reabsorption and lymphatic drainage of extravasated urine from retroperitoneal urinomas), or by a mechanism of direct transdiaphragmatic passage from those collections to the pleural cavity. Other etiologies have been described such as: retroperitoneal inflammatory processes; percutaneous endoscopic renal procedures; polycystic renal disease; ureteral valves; extracorporeal lithotripsy; or intra-abdominal compression from gravid uterus or lymphomatous masses.5–9

In our case, there were two simultaneous etiological factors to consider: the well documented obstructive uropathy with retroperitoneal urinary leakage; and the percutaneous nephrostomy placement at the time of admission. Though, in the latter case, no traumatic misplacement was recognized.

This unusual type of pleural effusion is frequently unilateral, of small-to-moderate volume and ipsilateral to the urinary obstructed tract.10 Although classically known as a transudate, on rare occasions it can present as an exudate.2,11

The fluid is normally clear and yellow, with a distinctive ammonia odor, with low protein content and normal to high LDH. There have also been reports of Low pH and glucose levels, but these are unreliable markers and may not always be present.7,11,12

The patognomonic feature is a pleural fluid-to-serum creatinine ratio always above one, although some variability has been reported, depending on the stage of evolution. Microbiological and cytopathological studies must be negative. In less typical situations or where there is low clinical suspicion of urinothorax, patients with recurrent effusions of undetermined etiology might undergo medical thoracoscopy.

On CT imaging, perirenal urinomas, renal or other excretory tract pathology and extravasation of contrast-enhanced urine to the retroperitoneum or pleural space, are the most common features.13 Renal scans can also be valuable indicators of the presence of urinopleural fistula. Today, MAG-3 renal scans are preferred over the Tc-99m labeled diethylenetriamine pentaacetic acid (DTPA). Some authors suggest that, when a therapeutic intervention is possible, invasive studies like retrograde pyelogram and endoscopy of the renal collecting system, might be justified.13,14

Treatment is specifically directed to the correction of the primary cause and drainage of the fluid. In our case, as is normally the case, the relief of the urinary tract obstruction led to the progressive resolution of the effusion. The decision for nephrectomy was already being proposed by the Urology team as a better option than an ultrasound-guided drainage of the urinoma. The following elements were taken into consideration: the patient had had recurrent episodes of high tract lithiasic obstruction, with a strong tendency for sepsis; an only marginally functioning left kidney; and a recent confirmation of retroperitoneal leakage, even with nephrostomy, along with a persistent urinothorax as a new complication.

Simple tube thoracostomy is advised for large effusions and for patients where the symptoms are very clear. In case of asymptomatology or minor symptoms, it is reasonable to perform drainage by needle thoracocentesis because with most patients the urinothorax will clear-up after the primary obstruction is relieved.13

The recurrence of an urinothorax is a strong pointer toward an inadequately drained collecting system, which needs further study and to be treated aggressively. In a few cases, a persistent urinothorax may involve the surgical correction of concealed tears in the urinary system, renopleural fistulas or even nephrectomy, as described above. There have been no reports of persistent urinothorax requiring surgical management involving the diaphragm or thoracic cavity so, as recommended by Wey et al., the threshold for referring a patient for video-assisted thoracoscopic surgery (VATS) should therefore be high.13

This kind of etiology may easily go undiagnosed. In patients with pleural effusion and a current/recent urinary tract disorder it should be seriously considered.15 Ideally these patients are best managed by a multidisciplinary team including an urologist13 and a pulmonologist.

Ethical disclosuresProtection of human and animal subjects

The authors declare that no experiments were performed on humans or animals for this study.

Confidentiality of data

The authors declare that they have followed the protocols of their work center on the publication of patient data and that all the patients included in the study received sufficient information and gave their written informed consent to participate in the study.

Right to privacy and informed consent

The authors have obtained the written informed consent of the patients or subjects mentioned in the article. The corresponding author is in possession of this document.

Conflicts of interest

The authors have no conflicts of interest to declare.

References
[1]
D.D. Stark, J.G. Shanes, R.L. Baron, D.D. Koch.
Biochemical features of urinothorax.
Arch Intern Med, 142 (1982), pp. 1509-1511
[2]
E. Garcia-Pachon, I. Padilla-Navas.
Urinothorax: case report and review of the literature with emphasis on biochemical diagnosis.
Respiration, 71 (2004), pp. 533-536
[3]
F.W. Leung, A.J. Williams, P.A. Oill.
Pleural effusion associated with urinary tract obstruction: support for a hypothesis.
Thorax, 36 (1981), pp. 632-633
[4]
U. Parvathy, R. Saldanha, K.R. Balakrishnan.
Blunt abdominal trauma resulting in urinothorax from a missed uretero-pelvic junction avulsion: case report.
[5]
A. O’Donnell, C. Schoenberger, J. Weiner, E. Tsou.
Pulmonary complications of percutaneous nephrostomy and kidney stone extraction.
South Med J, 81 (1988), pp. 1002-1005
[6]
K. Karkoulias, F. Sampsonas, A. Kaparianos, M. Tsiamita, G. Tsoukalas, K. Spiropoulos.
Urinothorax: an unexpected cause of pleural effusion in a patient with non-Hodgkin lymphoma.
Eur Rev Med Pharmacol Sci, 11 (2007), pp. 373-374
[7]
E. Garcia-Pachon, S. Romero.
Urinothorax: a new approach.
Curr Opin Pulm Med, 12 (2006), pp. 259-263
[8]
J.R. Salcedo.
Urinothorax: report of 4 cases and review of the literature.
J Urol, 135 (1986), pp. 805-808
[9]
I.K. Oğuzülgen, A.I. Oğuzülgen, Z. Sinik, O. Köktürk, N. Ekim, U. Karaoğlan.
An unusual cause of urinothorax.
Respiration, 69 (2002), pp. 273-274
[10]
R.W. Light.
Transudative pleural effusions.
Pleural diseases, 3rd ed., Williams & Wilkins, (1995),
[11]
R.B. Mora, C.M. Silvente, J.M. Nieto, M.A. Cuervo.
Urinothorax: presentation of a new case as pleural exudate.
South Med J, 103 (2010), pp. 931-933
[12]
D.D. Stark, J.G. Shades, R.L. Baron, D.D. Koch.
Biochemical features of urinothorax.
Arch Intern Med, 142 (1982), pp. 1509-1511
[13]
B. Wei, H. Takayama, M. Bacchetta.
Urinothorax: an uncommon cause of pleural effusion.
Respir Med CME, 2 (2009), pp. 179-180
[14]
A. Taylor Jr., D. Eshima, P.E. Christian, W. Milton.
Evaluation of Tc-99m mercaptoacetyltriglycine in patients with impaired renal function.
Radiology, 162 (1987), pp. 365-370
[15]
E. Garcia-Pachon, I. Padilla-Navas.
Pleural effusion due to pyelonephritis or urinothorax?.
Respiration, 64 (1997), pp. 392

Please cite this article as: Ferreira PG, et al. Urinotórax como causa rara de derrame pleural – Revisitação a propósito de caso clínico. Rev Port Pneumol. 2013. http://dx.doi.org/10.1016/j.rppneu.2012.10.001.

Copyright © 2012. Sociedade Portuguesa de Pneumologia
Download PDF
Pulmonology
Article options
Tools

Are you a health professional able to prescribe or dispense drugs?