[Vesicoappendiceal Fistula: A Case Report].

A 65-year-old man had been aware of pieces of food occasionally in the urine since February 2008. In November 2010, he came to an outpatient clinic with high fever and cloudy urine and was diagnosed with urinary tract infection. Because he had fecaluria, interconnection between urinary bladder and digestive tract was suspected. Although excretory urography showed no remarkable findings, an outflow of contrast media into the appendix was demonstrated in the cystography. By cystoscopy, the fistula hole was confirmed on the posterior wall of the bladder and inflow of feces from the hole was noticed. Operation was performed under the diagnosis of vesicoappendiceal fistula. The appendix was adhesive to the ileum, the right side of the bladder and the upper side of the rectum, and an en bloc resection was performed. Because the fecalith existed near the fistula, appendicitis appeared to induce inflammatory change and abscess formation around the appendix, and the abscess might have perforate into the bladder.