One stage versus two stage pancreatoduodenectomies for perioampullary tumors.
D014670:Ampulla of Vater; D001650:Bile Duct Neoplasms / Q000601:surgery; D002277:Carcinoma / Q000601:surgery*; D004379:Duodenal Neoplasms / Q000601:surgery*; D004386:Duodenum / Q000601:surgery; D006801:Humans; D010180:Pancreatectomy; D011183:Postoperative Complications