MR Imaging of perianal Crohn disease

Shannon P. Sheedy, David H. Bruining, Eric J. Dozois, William A. Faubion, Joel G. Fletcher

Research output: Contribution to journalReview articlepeer-review

44 Scopus citations


Pelvic magnetic resonance (MR) imaging is currently the standard for imaging perianal Crohn disease. Perianal fistulas are a leading cause of patient morbidity because closure often requires multimodality treatments over a prolonged period of time. This review summarizes clinically relevant anal sphincter anatomy, imaging methods, classification systems, and treatment objectives. In addition, the MR appearance of healing perianal fistulas and fistula complications is described. Difficult imaging tasks including the assessment of rectovaginal fistulas and ileoanal anastomoses are highlighted, along with illustrative cases. Emerging innovative treatments for perianal Crohn disease are now available and have the promise to better control sepsis and maintain fecal continence. Different treatment modalities are selected based on fistula anatomy, patient factors, and management goals (closure versus sepsis control). Radiologists can help maximize patient care by being familiar with MR imaging features of perianal Crohn disease and knowledgeable about what features may influence therapy decisions.

Original languageEnglish (US)
Pages (from-to)628-645
Number of pages18
Issue number3
StatePublished - Mar 2017

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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