Fistulating sigmoid cancer
Altered bowel habit and abdominal pain.
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There is an irregular mass in the distal sigmoid colon, with a tract extending from this mass into nearby rectosigmoid junction. Regionally there is an irregular, heterogeneous and enlarged lymph node. Colonic diverticulosis is present. No distant metastases are shown.
Distal sigmoid carcinoma, fistulating into nearby rectosigmoid junction.
Tumor perforation can result in localized or peritoneal gas, as well as fistulation into nearby organs.