[A case of vesicosigmoidal fistula secondary to diverticulitis of the colon].

A case of vesicosigmoidal fistula secondary to the diverticulitis of colon is reported. A 63-year-old man was admitted to our clinic with the chief complaint of pneumaturia. Cystoscopy revealed an edematous, papillomatous lesion at the left posterior bladder wall. Although multiple diverticulosis of descending and sigmoid colon were demonstrated by barium enema, the presence of a fistula from the intestine to bladder was not confirmed. The presence of fistula was confirmed by detecting the orally administered charcoal in the urine. Resection of sigmoid colon with partial cystectomy was performed. Removed specimen revealed multiple sigmoidal diverticula and a fistula from a sigmoidal diverticulum to bladder through a firm mass. Histological examination of mass demonstrated inflammatory changes. This was the 58th case of vesicosigmoidal fistula due to diverticulitis of colon reported in the Japanese literature.