A vesicointestinal fistula (or intestinovesical fistula) is a form of fistula between the bladder and the bowel.

A fistula involving the bladder can have one of many specific names, describing the specific location of its outlet: If fecal matter passes through the fistula into the bladder, the existence of the fistula may be revealed by pneumaturia, fecaluria, or recurrent urinary tract infection.

Migration of urine through the fistula into the bowel may cause rectal passage of urine.

[6] Many causes exist including:[6] Various modalities of diagnosis are available:[7] A definite algorithm of tests is followed for making the diagnosis.