Abstract
A 70-year old man with severe comorbidities, hemodynamically stable, was emergently admitted for bowel obstruction. His chronic intractable constipation had never been evaluated. The patient had no history of abdominal surgery. Computed tomography indicated a large obstructive rectosigmoid tumour and dolichocolon. Immediate rectoscopy confirmed the presence of the obstructive tumour. Additionally, on emergent laparotomy, a malformed right-sided duodenum with right-sided small bowel and other midgut malrotation defects, along with a small palpable lesion in the proximal descending colon, were also found. We performed a subtotal colectomy, mobilization of the only existing first and second duodenal portions, division of mesenteric root adhesions, and a terminal ileostomy. The patient had a favourable outcome, was discharged on day 8. Histology revealed a pT3N1b rectosigmoid adenocarcinoma and an 1 cm in diameter localized c-kit+ stromal tumour in the proximal descending colon. He received chemotherapy. The patient underwent a postoperative upper gastrointestinal contrast study which showed a well-functioning right-sided deranged duodenum. During a 36-months follow-up no recurrence of malignancy or of midgut malrotation defects has been recognized.
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