RADIOLOGY: GASTROINTESTINAL: GI: Case# 104: COLOVESICLE FISTULA-CECUM. A 21-year-old female with colovesicle fistula. The liver, spleen, pancreas, gallbladder, adrenals, and right kidney are within normal limits. There is a 2 cm left renal cyst. There is a fistula extending from the right aspect of the dome of the bladder to the bowel in the region of the ileocecal valve. There is little pelvic fat making separation of structures in this region difficult. The fistula appears to extend to either the cecum or distal ileum. The terminal ileum may be thickened. A normal appendix cannot definitely be identified. There is no significant intra-abdominal lymphadenopathy. There is no evidence of free intraperitoneal air.