Korean J Med.  1999 Feb;56(2):229-234.

Solitary Plasmacytoma of Iliac Bone Rapidly Progressed to Multiple Myeloma

Affiliations
  • 1Department of Internal Medicine, Keimyung University School of Medicine.
  • 2Institute for Medical Genetics, Taegu, Korea.

Abstract

Solitary osseous plasmacytoma accounts for 3-5% of plasma cell tumor and are assumed to have a fairly good prognosis, with long duration of relapse free survival after local irradiation. A 64 year old woman with a lytic lesion involving left iliac bone was diagnosed as a solitary plasmacytoma, with a negative work-up for coexisting plasma cell disorders. Three months after irradiation of 5,400 cGy, the patient was readmitted with hypercalcemia and mass in left forehead and left gingiva. New multiple osteolytic lesions were developed. A aspiration cytology of forehead mass and curetted specimen of right femur due to pathologic fracture revealed plasmacytoma. MRI of thoracolumbar spine revealed abnormal high signal intensity in the L2 body, T8 and T9 vertebrae. Serum protein electropheresis revealed monoclonal gammopathy of IgG-kappa type. This aggressive case of solitary plasmacytoma, evolving into multiple myeloma after brief duration of remission, is in sharp contrast with the natural course of a solitary plasmacytoma.

Keyword

Solitary plasmacytoma of bone; Multiple myeloma; Iliac bone; Radiotherapy; MRI
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