CASE 91
History: A 63-year-old woman presents with perineal soiling.
1. Which of the following should be included in the differential diagnosis of the imaging finding shown in Figure A? (Choose all that apply.)
2. Where is the fistula shown in figures 2 and 3 extending to?
3. Which statement about colonic fistulas to the urogenital tract is true?
A. The most common fistula site is colovaginal.
B. The fistula is usually directly visualized on CT.
C. Sigmoidoscopy usually shows the fistula.
D. The most common cause is colonic diverticulitis.
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