title: Non-productor and non-secretory multiple myeloma. Analysis of 17 cases.
mesh_terms: D000328:Adult; D000368:Aged; D001853:Bone Marrow / Q000473:pathology; D005260:Female; D006801:Humans; D007075:Immunoglobulin M; D008297:Male; D008875:Middle Aged; D009101:Multiple Myeloma / Q000097:blood*; D010950:Plasma Cells / Q000648:ultrastructure*
chemical_list: D007075:Immunoglobulin M