[Uro-intestinal fistulas of cancerous origin]

Malignant entero-vesical fistulas are uncommon. Colonic malignancy is the main cause although fistula are present in just 1%. Pneumaturia and fecaluria are pathognomonic for entero-vesico-fistula and are present in half of cases. By combining the results of cystoscopy, barium enema and urine culture, fistula can be identified in almost all the cases. Escherichia coli, Streptococcus faecalis and Proteus mirabilis are very often isolated from the urine cultures. The management of entero-vesical-fistula depends of the etiology. The treatment requires in most of the case resection of the diseased bowel with partial cystectomy and primary anastomosis. But sometimes, is necessary to perform a diverting colostomy and urinary diversion.