Extension of operability of lesions in the vicinity of the head of the pancreas by the use of the Whipple operation; report of four cases.
D014670:Ampulla of Vater / Q000601:surgery*; D006257:Head; D006801:Humans; D010179:Pancreas; D016577:Pancreaticoduodenectomy
VATER'S AMPULLA/surgery