Abstract
One of the well-known complications of Crohn's disease (CD) is fistulation, but an enterovesical fistula is rare. Furthermore, the development of malignancy in a fistula is even rarer. We report a case of cancer in an enterovesical fistula caused by CD. A 53-year-old man had bypass surgery for ileus 28 years prior. In January, 2011, he was seen because of symptoms of ileus. Abdominal computed tomography scan demonstrated thickening of the bladder wall and adhesion of the near-by intestine.
Cystoscopy demonstrated tumor in the bladder cavity, and biopsy revealed adenocarcinoma. Bladder invasion by small intestinal cancer was diagnosed. Ileocecal resection and a partial cystectomy were performed. On histopathological examination, the tumor was found to have originated within the fistula. In CD patients with a long-term fistula cancer of the fistula should be considered.
