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Resumo
As placas pleurais (PP) são espessamentos focais da pleura, consideradas marcadores de exposição ao asbesto. Geralmente encontradas na ausência de alterações pulmonares, podem envolver a pleura parietal, diafragmática e, menos comummente, mediastinal. Embora a radiografia simples de tórax seja o método mais comummente utilizado no diagnóstico das PP, a tomografia computadorizada é o exame de imagem com maiores sensibilidade e especificidade, especialmente quando empregada a técnica de alta resolução. As PP geralmente não causam sintomas, mas ainda existem controvérsias quanto à relação entre as mesmas e índices de exposição ao asbesto, alterações funcionais pulmonares e risco de desenvolvimento de neoplasias.
Rev Port Pneumol 2005; XI (5): 487-497
Unitermos:
Asbesto
pleura
anormalidades
tomografia computadorizada por raios-X
pneumo-conioses
doenças ocupacionais
Abstract
Pleural plaques (PP) are considered to be hallmarks of asbestos exposure. They constitute focal thickenings of the pleura and are commonly seen in patients without lung disease. They can involve parietal, diaphragmatic and mediastinal pleura. Chest x-ray is frequently used for PP diagnosis, but computed tomography, especially when used the high-resolution technique, is the imaging exam with the greatest sensibility and specificity. PP are almost always asymptomatic, but there are some controversial about their relationship with asbestos exposure indexes, pulmonary functional alterations and risk of neoplasias.
Rev Port Pneumol 2005; XI (5): 487-497
Key-words:
Asbestos
pleura
abnormalities
HRCT
pneumoconioses
occupational diseases
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