Pleural malignant mesothelioma complicated by multiple myeloma

: A 79-year-old woman was admitted because of dyspnea. Chest X-ray films and computed tomographic scans disclosed left pleural effusion and diffuse pleural thickening. A diagnosis of multiple myeloma was made on the basis of blood tests and bone marrow aspiration biopsy findings. Multiple myeloma was the suspected cause of the pleural lesions. However, a postmortem diagnosis of malignant mesothelioma of the pleura was made on the basis of histological and immunohistological studies of autopsy specimens.