[Clinical evaluation of cytological diagnosis for cancer of the esophagus, duodenum, pancreas and biliary tract (author's transl)].
D001650:Bile Duct Neoplasms / Q000175:diagnosis*; D003581:Cytodiagnosis; D004379:Duodenal Neoplasms / Q000175:diagnosis*; D004938:Esophageal Neoplasms / Q000175:diagnosis*; D006801:Humans; D010190:Pancreatic Neoplasms / Q000175:diagnosis*