Embryonal rhabdomyosarcoma of the ampulla of vater.
The first case to appear in the world literature is described of an embryonal rhabdomyosarcoma in a child  arising from the region of the ampulla of Vater and projecting into the lumen of the duodenum.
D014670:Ampulla of Vater; D001650:Bile Duct Neoplasms / Q000473:pathology*; D002648:Child; D004379:Duodenal Neoplasms / Q000473:pathology; D006801:Humans; D008113:Liver Neoplasms / Q000473:pathology; D008297:Male; D009362:Neoplasm Metastasis / Q000473:pathology; D012208:Rhabdomyosarcoma / Q000473:pathology*