Multiple myeloma (MM) is a malignant tumor of plasma cell characterized by overproduction of abnormal plasma cells in the bone marrow and skeletal destruction. The clinical features are bone pain, renal impairment, immunodeficiency, anemia and presence of abnormal immunoglobulins (Ig).
An exanthema consisting of widespread pink-to-red macules (flat spots of 2-10 mm in diameter) or papules (red bumps) that blanch with pressure. The macules and papules may cluster and merge to form sheets over several days.