Multiple myeloma in young men. Clinical course and electron microscopic studies of bone marrow plasma cells

Two cases of multiple myeloma in young men are described. Electron microscopic characteristics of the bone marrow plasma cells are presented. Multiple myeloma is unusual in the young, and when onset in male patients occurs between the ages of 15 and 25 years, the clinical course is more mild and survival longer, even though response to chemotherapy is limited.