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Detection and localization of an occult vesicoenteric fistula.

Detection and localization of an enterovesicular fistula in a patient with chronic inflammatory bowel disease and recurrent urinary tract infection was accomplished by following a bolus of orally administered gold colloid as it traversed the gastrointestinal tract with serial scintiphotos and simultaneously monitoring the activity in the urine. When significant tracer was found in the urine, multiple scans of the abdomen were obtained to determine the location of the tracer. To confirm the site of the fistula, the tracer was mixed with barium and administered per rectum. Radiographs were obtai