title: [Malignant thymoma with diffuse extensive growth on the pleura].
abstract: A 71-year-old man was admitted complaining of cough and high fever. Chest X-ray and CT scanning showed diffuse thickening of both pleurae and malignant mesothelioma was suspected. Upon pleural biopsy, a diagnosis of lymphosarcoma, well differentiated type, was made. Postmortem examination revealed diffuse, extensive fibrous thickening of both pleurae with multifocal spreading of tumor cells. These occasional Hassal's bodies. The latter cells were spindle-shaped and ovoid. Therefore, the tumor was diagnosed as "malignant thymoma, mixed type".
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008654:Mesothelioma / Q000473:pathology; D009361:Neoplasm Invasiveness; D010994:Pleura / Q000473:pathology*; D010997:Pleural Neoplasms / Q000473:pathology*; D013945:Thymoma / Q000473:pathology*; D013953:Thymus Neoplasms / Q000473:pathology*