Evaluate perianal fistula. History of Crohn's disease. PELVIS:PROSTATE/SEMINAL VESICLES: No significant abnormality noted.BLADDER: No significant abnormality noted.LYMPH NODES: Several subcentimeter pelvic lymph nodes measuring less than 1 cm in short axis are noted and are likely reactive.BOWEL, MESENTERY: The pelvis is partially imaged. There is mild circumferential wall thickening of the imaged sigmoid colon which demonstrates restricted diffusion, hyperenhancement and perinephric stranding.BONES, SOFT TISSUES: At approximately the 2:00 position of the anal canal there is a fistula tract extending inferiorly in the intersphincteric space terminating at the left gluteal fold. There is no discrete fluid collection.OTHER: No significant abnormality noted.
Intersphincteric fistula extending to the left gluteal fold without an associated fluid collection. It appears to originate at approximately the 2:00 position of the anal canal.Mild active sigmoid colitis.