title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 37-1980.
mesh_terms: D002648:Child; D003937:Diagnosis, Differential; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology; D008202:Lymphangioma / Q000175:diagnosis / Q000473:pathology*; D008297:Male; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000473:pathology*