title: Duodenal schwannoma causing gastrointestinal bleeding: helical CT findings.
abstract: Neurogenic tumors of the small intestine are extremely rare and represent an unusual cause of gastrointestinal hemorrhage. We present a case of schwannoma of the fourth portion of the duodenum demonstrated by helical computed tomography. Multiplanar reconstructions showed a hypervascular tumor arising from the inferior wall of the duodenum. The use of water as oral contrast agent instead of iodinated contrast permitted a better visualization of the intact mucosa and differentiated a hypervascular tumor from hypodense gastrointestinal content.
authors.affiliation: Servei de Radiodiagnòstic, I.D.I. Hospital General i Universitari Vall d'Hebró, E-08036 Barcelona, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Quiroga
authors.forename: A
authors.initials: A
authors.lastname: Alvarez-Castells
authors.forename: E
authors.initials: E
authors.lastname: Pallisa
authors.forename: M C
authors.initials: MC
authors.lastname: Sebastià
mesh_terms: D000368:Aged; D003287:Contrast Media; D004379:Duodenal Neoplasms / Q000098:blood supply / Q000000981:diagnostic imaging*; D006471:Gastrointestinal Hemorrhage / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D008297:Male; D009389:Neovascularization, Pathologic / Q000000981:diagnostic imaging; D009442:Neurilemmoma / Q000098:blood supply / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*; D014867:Water
chemical_list: D003287:Contrast Media; D014867:Water