Introduction Extramedullary plasmacytoma(EMP)is an uncommon tumor that often develops outside the bone and arises from clonal proliferation of atypical plasma cells before EMP is diagnosed.Multiple myeloma (MM)must be excluded by performing laboratory tests such as serum protein electrophoresis,bone marrow biopsy and skeletal imaging ex- aminations.A bone marrow biopsy should show no evidence of mul- Introduction Extramedullary plasmacytoma (EMP) is an uncommon tumor that often develops outside the bone and arises from clonal proliferation of atypical plasma cells before EMP is diagnosed. Multiple myeloma (MM) must be excluded by performing laboratory tests such as serum protein electrophoresis, bone marrow biopsy and skeletal imaging ex-aminations. A bone marrow biopsy should show no evidence of mul-