Multiple Myeloma with Histiocytosis.

Myeloma is a disease characterized by abnormal clonal plasma cells that produces paraprotein. The coincidence of myeloma and histiocytosis is a rare clinical manifestation. This case report describes a 50-year-old female with back pain, anemia, increased globulin and hypercalcemia due to multiple myeloma. Bone marrow cytomorphology revealed an increased number of plasmocytes and histiocytosis.