[Differential diagnosis of periampullary carcinoma by ultrasonography].
D000328:Adult; D000368:Aged; D014670:Ampulla of Vater; D003138:Common Bile Duct Neoplasms / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000175:diagnosis*; D014463:Ultrasonography