[A case of extramedullary plasmacytoma].

The patient is 51-year-old male. A tumor arose on the upper eye lid at the age of 44 years and 6 years later, a tumor arose on the forearm. The tumor recurred 3 times on the forearm and were resected each times. When he was 51 years old, 3 tumors arose on the upper arm. Tumors were found in the cutis and subcutis of the jaw, back, forearm and thigh. A tumor was also found on the palatine tonsil. Bence Jones protein was negative in serum and urine. There were no particular findings in serum immunoelectrophoresis, bone X ray films, bone marrow aspiration and bone scintigram. The Borrmann 4-like pattern was revealed on the stomach by barium examination. By chemotherapy and radiotherapy, the tumors decreased markedly in size. Excisional biopsy showed that the tumor was composed of atypical plasma cells and gamma-chain and lambda-chain were immunohistologically detected.