Appendicovesical fistula associated with neuroma of the appendix.

A new case of appendicovesical fistula is reported. Usually a known cause is ulcerative colitis, morbus Crohn, malignancy of the appendix or as complication to perforated appendicitis, but in the described case there was no history of such previous illness. The only pathological finding was the presence of an abundant amount of nervous tissue in the appendix. It is concluded that a history of pneumaturia and/or recurrent urinary-tract infections must rise the suspicion of the presence of a fistula between the small or large intestine and the bladder.