Carcinosarcomas are relatively rare tumors composed of both carcinomatous and sarcomatous components. The most common sites involved by this tumor are the head and neck, respiratory tract, uterus, ovaries, and fallopian tubes. Within the gastrointestinal tract this tumor most often occurs in the esophagus, followed by the stomach. Carcinosarcomas are very aggressive tumors associated with a poor prognosis. The first case of carcinosarcoma of the colon was reported in 1986. The case reported here is the only one involving an associated colovesical fistula.
Corrosive injury to the GI tract still poses great challenges with regards to the initial evaluation triage, as well as the optimization of medical management. Although relatively uncommon in the adult population, these injuries can cause significant morbidity and serious sequelae of complications, such as esophageal strictures and cancer. Prompt recognition of the process and aggressive measures towards the stabilization of the patient are key to a favorable outcome.
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