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DOI:10.2214/AJR.07.2485
AJR 2007; 189:765-773
© American Roentgen Ray Society

Review

Sonography of Benign Conditions of the Anal Canal: An Update

Francesca Berton1,2, Giada Gola1,3 and Stephanie R. Wilson1,4

1 Department of Medical Imaging, Section of Ultrasound, Toronto General Hospital, University of Toronto, Toronto, ON M5G 2N2, Canada.
2 Present address: Institute of Radiology, IRCCS S. Matteo Hospital, University of Pavia, Pavia, Italy.
3 Present address: Serves di Radiologia, Ospedale Civile di Voghera, Voghera, Pavia, Italy.
4 Present address: Department of Diagnostic Imaging, Foothills Medical Centre, 1403 29 St. NW, Calgary, AB T2N 2N9, Canada.

OBJECTIVE. The objective of this article is to describe our experience with sonography for the study of benign conditions of the anal canal and perianal soft tissues.

CONCLUSION. Assessment of the anal sphincters in patients with fecal incontinence and documentation of perianal inflammatory masses and tracts in those with perianal inflammatory disease are the major indications for imaging the anal canal. We augment traditional transanal sonography with transperineal scanning in both sexes and transvaginal scanning in women to better show the anal canal in its quiet state to allow an accurate assessment of the integrity of the anal sphincters and of evidence of acute or chronic inflammatory involvement.

Keywords: anal canal • Crohn's disease • fecal incontinence • perianal inflammatory masses • sonography • transanal imaging • transperineal imaging • transvaginal imaging


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Copyright © 2007 by the American Roentgen Ray Society.