title: Is radical surgery necessary for early-stage ampullary tumors?
authors.forename: Syed A
authors.initials: SA
authors.lastname: Ahmad
mesh_terms: D014670:Ampulla of Vater / Q000601:surgery*; D006801:Humans; D010190:Pancreatic Neoplasms / Q000601:surgery*; D016577:Pancreaticoduodenectomy