title: Psammomatous carcinoid tumor of the duodenum.
abstract: We report a case of psammomatous calcification in a carcinoid tumor of the ampulla of Vater. Although the tumor was glandular, its neuroendocrine nature was proved using chromogranin immunostain.
authors.affiliation: Tata Memorial Hospital, Parel, Bombay.
authors.forename: S A
authors.initials: SA
authors.lastname: Pai
authors.forename: S
authors.initials: S
authors.lastname: Krishnamurthy
authors.forename: C S
authors.initials: CS
authors.lastname: Soman
mesh_terms: D000368:Aged; D014670:Ampulla of Vater; D002276:Carcinoid Tumor / Q000473:pathology*; D003138:Common Bile Duct Neoplasms / Q000473:pathology*; D004379:Duodenal Neoplasms / Q000473:pathology*; D006801:Humans; D008297:Male