Source:http://linkedlifedata.com/resource/umls/id/C0032131
MSH: Any discrete, presumably solitary, mass of neoplastic PLASMA CELLS either in BONE MARROW or various extramedullary sites.,NCI: A type of cancer that begins in plasma cells (white blood cells that produce antibodies). A plasmacytoma may turn into multiple myeloma.,NCI: A malignant (clonal) proliferation of plasma cells that are cytologically and immunophenotypically identical to those of plasma cell myeloma, but manifest a localized osseous or extraosseous growth pattern. (WHO, 2001),NCI: A single focus of clonal (malignant) plasma cells either in the bone or in another anatomic site without peripheral blood involvement. --2003