title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 48-1992. An 82-year-old man with pulmonary densities and a mass in the left upper abdominal quadrant.
mesh_terms: D000368:Aged; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology*; D016393:Lymphoma, B-Cell / Q000473:pathology*; D008297:Male; D012186:Retroperitoneal Neoplasms / Q000473:pathology*