title: [Neoplasms of Vater's papilla: study of nucleolar organizer regions].
abstract: We analyzed the number and aspect of nucleolar organizer regions in 11 specimens from ampullary carcinoma, by means of silver colloidal staining. The number of regions was higher than that found in intestinal villi but similar to that in cripti. The size of the regions was larger than any of those mentioned above. These elements may contribute to evaluate endoscopic samples in the diagnosis of ampullary lesions.
authors.affiliation: Departamento de Cirugía, Facultad de Medicina, Universidad de La Frontera, Temuco, Chile.
authors.forename: J C
authors.initials: JC
authors.lastname: Araya
authors.forename: I
authors.initials: I
authors.lastname: Roa
authors.forename: I
authors.initials: I
authors.lastname: Wistuba
authors.forename: X
authors.initials: X
authors.lastname: de Aretxabala
mesh_terms: D000328:Adult; D000368:Aged; D014670:Ampulla of Vater; D001706:Biopsy; D003102:Colloids; D003138:Common Bile Duct Neoplasms / Q000175:diagnosis / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009697:Nucleolus Organizer Region / Q000473:pathology*; D012834:Silver; D013194:Staining and Labeling
chemical_list: D003102:Colloids; D012834:Silver
vernacular_title: Tumores de papila de Vater: estudio de regiones del organizador nucleolar.