Mariya Kobi MD, Presenter: Nothing to Disclose

Fernanda Samara Mazzariol MD, Abstract Co-Author: Nothing to Disclose

Sarah Kyung Oh MD, Abstract Co-Author: Nothing to Disclose

Milana Flusberg MD, Abstract Co-Author: Nothing to Disclose

Alla M. Rozenblit MD, Abstract Co-Author: Nothing to Disclose

Victoria Chernyak MD, Abstract Co-Author: Speakers Bureau, Lantheus Medical Imaging, Inc

Understanding the anatomy of the anal sphincter is important in order to detect pathology and provide accurate information to the referring physician. Optimization of MR imaging techniques is required for detailed evaluation of the anal/perianal region.

Review of MR protocol and post processing techniques optimizing imaging of the anal canal. The exhibit will include the review of the following but is not limited to: 1. Atrophy and tears of the external anal sphincter 2. Intrinsic abnormalities of internal anal sphincter     a. Thickening in the setting anismus     b. Atrophy and fibrosis following surgery and radiation therapy. 3. Perianal fistulas     a. Intersphincteric     b. Transsphincteric     c. Translevator     d. Anovaginal fistulas following obstetric trauma 4. Postsurgical appearance of internal and external anal sphincter muscles 5. Pilonidal disease of the anal canal 6. Suppurative hydraadenitis of the anal sphincter 7. Sarcoma invading the anal canal.  

A. Review optimal MR imaging protocol including sequences, imaging planes and posptrocessing techniques. B. Review anatomy and both intrinsic and extrinsic abnormalities of the anal canal. C. Review of the classification of perianal fistulas. 

Kobi, M, Mazzariol, F, Oh, S, Flusberg, M, Rozenblit, A, Chernyak, V, Rear View: Anatomy and Pathology of the Anal Canal.  Radiological Society of North America 2013 Scientific Assembly and Annual Meeting, December 1 - December 6, 2013 ,Chicago IL. http://archive.rsna.org/2013/13023727.html