Disseminated rhabdomyosarcoma of the urinary bladder in an adult.

A rare case of alveolar rhabdomyosarcoma of the urinary bladder, manifested as a systemic disease in a 51-year-old woman, was diagnosed at necropsy. Diffuse lytic bone lesions and extensive bone marrow involvement with a leukoerythroblastic blood picture led to an initial clinical diagnosis of a hematologic malignancy.