Evaluate for perirectal abscess or fistula. PELVIS:PROSTATE/SEMINAL VESICLES: No significant abnormality noted.BLADDER: No significant abnormality noted.LYMPH NODES: No significant abnormality noted.BOWEL, MESENTERY: There is a perirectal fluid collection/abscess measuring 2.3 x 1.2 cm (series 4/41) adjacent to the right posterolateral rectum. There is mild mass effect onto and mild wall thickening of the adjacent rectum. This is associated with a fistulous tract extending inferiorly and towards the left where it crosses the midline (series 4 image 29 through 39) in the intersphincteric space. There is suspected communication with the 5-6:00 position/dorsal aspect of the anal canal (series 4/29).There are mild presacral inflammatory changes.BONES, SOFT TISSUES: No significant abnormality noted.OTHER: No significant abnormality noted.
Peri-anal fistula originating at the 5 to 6 o'clock position/left dorsal aspect of the anal canal predominantly extending within the intersphincteric space superiorly and terminating in a 2.3 cm perirectal abscess. Mild mass effect and wall thickening of the adjacent rectum. Overall the abscess and fistula tract is decreased in size and extent compared to 2010.