A case of urachal carcinoma with transverse colon fistula

: A 61-year-old woman was admitted to our hospital because of abdominal pain. Computed tomography showed an abscess in the anterior abdominal wall and an intraabdominal tumor. Biopsy from bladder dome presented adenocarcinoma. We diagnosed the tumor as urachal carcinoma and operation was performed. The resected specimen showed transverse fistula. In Japan, there is no report of urachal carcinoma with fistula to digestive duct. We think it is a cause of strong infiltration of the carcinoma. Curative resection for urachal carcinoma with fistula can lead to a better prognosis, in spite of its invasive character.