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Case 1. The patient was an 80-year-old man with EVF caused by diverticulitis of the sigmoid colon. Bladder fistula was identified at the base. Severe inflammatory adhesion due to previous diverticulitis existed around the sigmoid colon. We dissected around the sigmoid colon and dissected the fistula sharply along the diseased intestine. The water leak test was negative, and hence no additional treatment for the bladder was needed.
