title: Retroperitoneal amyloidosis, factor IX and X deficiency,and gastrointestinal bleeding.
abstract: A patient with gastrointestinal bleeding due to amyloidosis-related factor X deficiency had extensive calcified retroperitoneal amyloid deposition that was visible on plain radiographs and then localized by computed tomography. The radiologic findings were important in arriving at the proper diagnosis despite negative biopsies.
authors.affiliation: Department of Radiology, Loyola University Medical Center, 2160 South First Avenue, Maywood, IL 60153, USA.
authors.forename: T J
authors.initials: TJ
authors.lastname: Figler
authors.forename: A
authors.initials: A
authors.lastname: Keshavarzian
authors.forename: S
authors.initials: S
authors.lastname: Nand
authors.forename: T C
authors.initials: TC
authors.lastname: Demos
mesh_terms: D000368:Aged; D000686:Amyloidosis / Q000150:complications* / Q000000981:diagnostic imaging; D002114:Calcinosis / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D005171:Factor X Deficiency / Q000209:etiology*; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D002836:Hemophilia B / Q000209:etiology*; D006801:Humans; D008297:Male; D012187:Retroperitoneal Space / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed