Massive hematuria due to extramedullary plasmacytoma invading the bladder.

Bladder involvement by extramedullary plasmacytoma is a rare condition. A 46-year-old woman with known IgA-lambda multiple myeloma who developed this condition is described. The patient suffered from massive hematuria, which led to hypovolemic shock. Prompt supportive treatment by blood transfusions, fulguration of the bleeding mucosa and continuous bladder irrigation stopped the bleeding. Subsequent bladder irradiation lead only to partial response of the tumor.