Congenital anal atresia
Malignant neoplasm of colon, bladder, or reproductive system
Postoperative or postpartum complications
Embedded stone eroding through bladder wall
Pelvic inflammatory disease, endometritis
Intestinovesical fistula secondary to Crohn's disease.
Figure 1, roentgenogram of the pelvis obtained with the patient in the supine position during an intravenous pyelogram, demonstrates a collection of gas in the urinary bladder and an irregular filling defect in the superior wall of the bladder. Figure 2 is a selected view from a combined barium examination of the small bowel and colon demonstrating an ulcerated stenotic loop of ileum with a fistulous communication to the urinary bladder and a colovesical fistula. Figure 3 is a roentgenogram of