[Photomicrographs of a pleural biopsy specimen, showing malignant mesothelioma and necrosis--malignant pleural mesothelioma in a patient with sarcoidosis].

A 45-year-old woman was admitted to Nara Medical University Hospital because of right-sided chest pain. Both a chest X-ray film and a chest CT scan revealed bilateral hilar and mediastinal lymphadenopathy and right pleurisy. She underwent fiberoptic bronchoscopy and mediastinoscopy. Biopsy specimens of the lung and mediastinal lymph nodes showed non-caseous epithelioid cell granulomas. After on ophthalmologic examination, she was given a diagnosis of sarcoidosis with a pleural lesion and uveal involvement. The pleurisy become less severe and the lymph nodes shrank without any treatment. About one year later, she complained of right-sided chest pain again and a chest X-ray film revealed diffuse thickening of the pleural on the right side. Examination of pleural biopsy specimens revealed malignant mesothelioma. We know of no previous report from Japan of malignant pleural mesothelioma in a patient with sarcoidosis.