title: Colonic endometriosis mimicking colon cancer on a virtual colonoscopy study: a potential pitfall in diagnosis.
abstract: Colonic endometriosis has been reported in the literature to mimic colon cancer. Patients can present with symptoms almost identical to colon cancer. We present an exemplary case of a woman who was found to have a mass on conventional colonoscopy. Virtual colonoscopy was instrumental in characterizing the obstructive sigmoid mass. A biopsy of the mass revealed sigmoid endometriosis.
authors.affiliation: Department of Radiology, Northwestern Medical Faculty Foundation, Chicago, IL 60611, USA.
authors.forename: Jonathan D
authors.initials: JD
authors.lastname: Samet
authors.forename: Karen M
authors.initials: KM
authors.lastname: Horton
authors.forename: Elliot K
authors.initials: EK
authors.lastname: Fishman
authors.forename: Ralph H
authors.initials: RH
authors.lastname: Hruban