title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 21-1992. A 65-year-old man with a mass that involved the base of the skull.
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D009101:Multiple Myeloma / Q000473:pathology*; D010954:Plasmacytoma / Q000473:pathology*; D012888:Skull Neoplasms / Q000473:pathology*; D013101:Sphenoid Sinus