A rare occurrence of viability of both small and large bowel in ileosigmoid knotting: A case report

•Ileosigmoid knotting is rare.•Presents as intestinal obstruction.•It has a high mortality and morbidity.•Viable small and large bowel. Ileosigmoid knot is an uncommon cause of acute intestinal obstruction where the ileum wraps around the base of a redundant sigmoid colon. We present an unusual case of a 45-year-old male patient who presented with signs and symptoms of intestinal obstruction. Exploratory laparotomy revealed an ileosigmoid knot. Both the small and large bowels were viable. The sigmoid colon was resected an end to end anastomosis was done. His post-operative period was uneventful. Preoperative diagnosis of the condition is difficult. Diagnostic delays coupled with the infrequent occurrence of the condition often results in patients commonly presenting with gangrene of the ileum, sigmoid loop or both. There is considerable controversy regarding the optimal management of this rare condition. Management involves preoperative resuscitation, empirical antibiotics and prompt relief of the obstruction. The anatomical and pathological changes of the involved loops of bowel dictate the definitive surgical procedure. The vast majority of cases present with gangrenous loops of ileum, the sigmoid colon or both. To identify the presence of the ileum and sigmoid colon being viable on exploration is a rarity. The management of a patient who has both viable loops of bowel on exploration is a contentious issue. Traditional teaching dictates that untying of the knot should be coupled with resection of the sigmoid colon to negate the risk of a recurrence. Some case reports suggest that resection may not be necessary as the risk of recurrence is believed to be low.