title: Ampullary carcinoid tumors diagnosed by endoscopic     ultrasound-guided fine needle aspiration in two patients with biliary and     pancreatic duct obstruction.
authors.affiliation: Division of Gastroenterology and Hepatology, Department of Internal Medicine, Indiana University Medical Center, Indianapolis, Indiana 46202, USA.
authors.forename: I I
authors.initials: II
authors.lastname: El Hajj
authors.forename: A H
authors.initials: AH
authors.lastname: El Chafic
authors.forename: H
authors.initials: H
authors.lastname: Cramer
authors.forename: M
authors.initials: M
authors.lastname: Al-Haddad
mesh_terms: D014670:Ampulla of Vater / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D044963:Biopsy, Fine-Needle; D002276:Carcinoid Tumor / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D002779:Cholestasis / Q000209:etiology; D003138:Common Bile Duct Neoplasms / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D016099:Endoscopy, Gastrointestinal; D019160:Endosonography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010183:Pancreatic Ducts / Q000473:pathology; D018084:Ultrasonography, Interventional