History of bilateral anal cutaneous fistula and perirectal abscesses. PELVIS:PROSTATE/SEMINAL VESICLES: No significant abnormality noted.BLADDER: The bladder is contracted with suggestion of diffuse bladder wall thickening.LYMPH NODES: No significant abnormality noted.BOWEL, MESENTERY: Presacral loculated fluid collection extending anteriorly around the rectum measuring 8.3 x 3.3 cm (series 901/46) with very low intensity foci compatible with gas. There is associated presacral edema.Additional prevesicular left-sided loculated fluid collection measuring 5.5 x 3.2 cm (series 9 and 1/55).Additional free pelvic ascites is noted.BONES, SOFT TISSUES: Originating at the 6:00/posterior anal canal is a fistula tract which bifurcates and progresses dorsally in the bilateral gluteal subcutaneous fat. On the right the tract bifurcates with one component terminating along the medial right gluteal cleft (series 901/17). The other component on the right progresses dorsally and terminate at an additional paramedial site on the skin. The left sided fistulous tract terminates along the left medial gluteal fold. No associated drainable fluid collection. OTHER: No significant abnormality noted.
1.Complex fistulous tract originating at the 6:00/posterior aspect of the anal canal with 2 right-sided and one left-sided gluteal fold insertions onto the skin surface.2.Two pelvic abscesses one in the presacral space and left prevesicular space.3.Trace free pelvic fluid. 