Squamous cell carcinoma arising from longstanding colocutaneous fistula: a case report.

A 60-year-old female patient suffered unhealed wounds over left flank for around 30 years after surgical removal of left renal stones. Fecal material spilled from the two small openings of the scar, bothered her all day long. During the course of the 30 years, she suffered from intermittent fever, diarrhea and wound pain and presented with malnourished condition. After serial examinations, tumor associated with iatrogenic colo-cutaneous fistula was impressed and she received en bloc resection. Pathology revealed squamous cell carcinoma arising from the fistula with colon and spleen invasion. To the best of our knowledge, no such case has been reported, as yet.