title: Imaging findings of unusual anorectal and perirectal pathology: a multi-modality approach.
abstract: The objective of this review is to discuss the less common causes of rectal and perirectal disease with an emphasis on their differentiating radiological features and the importance of a multimodality imaging approach. Radiologists should be aware of the ultrasound, computed tomography, and magnetic resonance imaging appearances of the wide variety of uncommon lesions arising from the rectal and perirectal regions that may simulate adenocarcinoma in order to render an accurate diagnosis and facilitate appropriate management.
authors.affiliation: Department of Radiology, St Paul's Hospital, University of British Columbia, Vancouver, BC, Canada. hannah.rouse@gmail.com
authors.forename: H C
authors.initials: HC
authors.lastname: Rouse
authors.forename: M C B
authors.initials: MC
authors.lastname: Godoy
authors.forename: W-K
authors.initials: WK
authors.lastname: Lee
authors.forename: P T
authors.initials: PT
authors.lastname: Phang
authors.forename: C J
authors.initials: CJ
authors.lastname: Brown
authors.forename: J A
authors.initials: JA
authors.lastname: Brown
mesh_terms: D000328:Adult; D000368:Aged; D002276:Carcinoid Tumor / Q000175:diagnosis*; D003287:Contrast Media; D003560:Cysts / Q000175:diagnosis; D003937:Diagnosis, Differential; D003952:Diagnostic Imaging / Q000379:methods*; D004715:Endometriosis / Q000175:diagnosis; D019160:Endosonography; D005260:Female; D006411:Hematopoiesis, Extramedullary; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D007223:Infant; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D012002:Rectal Diseases / Q000175:diagnosis*; D012004:Rectal Neoplasms / Q000175:diagnosis; D012445:Sacrococcygeal Region
chemical_list: D003287:Contrast Media