Dual-Segment Colonic Volvulus Involving the Sigmoid and Transverse Colon: A Surgical Emergency.

Synchronous colonic volvulus is an extremely rare and life-threatening cause of large bowel obstruction, characterized by simultaneous torsion of two separate colonic segments. Early diagnosis is challenging due to its nonspecific clinical presentation and overlapping radiological features with isolated volvulus. Delay in recognition increases the risk of ischemia, perforation, sepsis, and mortality, making rapid identification and surgical intervention critical. We present a case of a middle-aged patient who arrived at the emergency department with progressive abdominal pain, distension, constipation, and absence of flatus. Physical examination revealed a markedly distended abdomen with diffuse tenderness, and laboratory tests demonstrated leukocytosis. Abdominal radiographs suggested large bowel obstruction, while contrast-enhanced computed tomography (CECT) demonstrated the characteristic whirl sign at two distinct anatomical sites, consistent with synchronous volvulus of the sigmoid and transverse colon. The patient underwent emergency exploratory laparotomy, which confirmed volvulus of both affected segments with compromised vascularity. Surgical management included resection of the necrotic segments with primary anastomosis. The postoperative course was uneventful, and the patient was discharged in stable condition with scheduled follow-up. This case highlights the importance of maintaining a high index of suspicion in patients presenting with acute large bowel obstruction, particularly when imaging demonstrates atypical or dual transition points. While sigmoid volvulus is the most common form, synchronous involvement of multiple colonic segments is exceedingly uncommon but should be considered to prevent diagnostic delay. Timely surgical intervention remains the cornerstone of management and is paramount in preventing progression to gangrene, peritonitis, and septic shock.