title: Diagnostic significance of biliary tract dilation in periampullary tumors during the prejaundice stage.
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis*; D014670:Ampulla of Vater; D001650:Bile Duct Neoplasms / Q000175:diagnosis*; D001659:Biliary Tract / Q000473:pathology*; D003937:Diagnosis, Differential; D004108:Dilatation, Pathologic; D005260:Female; D006801:Humans; D007565:Jaundice / Q000175:diagnosis*; D008875:Middle Aged