Figure 6c. Rectovesical fistula in a 55-year-old woman who underwent radical hysterectomy and radiation therapy. (a) Contrast-enhanced CT scan shows a fistulous tract (arrow) between the urinary bladder (UB) and rectosigmoid junction (R). (b) Lateral image from a barium enema examination clearly shows the fistulous tract (arrows). (c) Contrast-enhanced CT scan obtained caudad to a shows a recurrent mass (arrows) in the vaginal stump.