Small bowel volvulus caused by a congenital band in a young adult: indirect computed tomography signs and surgical correlation.

Small-bowel volvulus caused by a congenital band is an uncommon etiology of small-bowel obstruction in adults, particularly in young patients without prior abdominal surgery. We report the case of a 20-year-old woman presenting with acute small-bowel obstruction. Contrast-enhanced computed tomography (CT) demonstrated dilated proximal bowel loops with a focal transition point, associated with a beak sign, fatty notch sign, and mesenteric whirl sign, suggestive of volvulus due to a single obstructing band, without signs of bowel ischemia. Surgical exploration confirmed a congenital band between two ileal loops, which was successfully divided with an uneventful postoperative outcome. This case highlights the diagnostic value of recognizing specific CT features that may suggest congenital bands and facilitate timely surgical management.