A Case of Multiple Myeloma Firstly Diagnosed as Anemia and Back Pain Presumably Due to Alimentary Bleeding and Traumatic Fracture, But Later, Diagnosed Correctly by Serum Electrophoresis.

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A 76-year-old woman farmer, who had been treated for anemia presumably due to alimentary bleeding, complained left side back pain due to traumatic fracture of the left 8th and 9th ribs and was admitted to our hospital on August 15 1999. The first examination on admission revealed severe anemia, hyperproteinemia with monoclonal gammopathy (IgG) and proteinuria. During hospitalization, immunoelectrophoresis demonstrated M protein type IgG in the serum and light chains, Bence Jones' protein, type κ in the urine. The diagnosis of multiple myeloma was confirmed, and then cyclophosphamide (Endoxan) initially administered followed by corticosteroids folllowingly were used. Regretfully, the patient died of acute renal failure October 13 1999.