Adenocarcinoma of the urachus with vesicoenteric fistula.

A case of mucoid adenocarcinoma of the urachus demonstrated by ultrasonography, cystography, and computerized tomography is presented. The inhomogeneous, echogenic mass was confluent with the anterior--superior aspect of the bladder but was also associated with a fistula between the bladder and small intestine, a finding not previously reported.