Retrograde jejunojejunal intussusception as a cause of small bowel obstruction after Roux-en-Y gastric bypass.

Retrograde jejunojejunal intussusception is a rare but recognized late complication of Roux-en-Y gastric bypass (RYGB). Clinical presentation is often nonspecific and overlaps with other postoperative complications, making imaging crucial for diagnosis. Contrast-enhanced computed tomography (CT) plays a central role by demonstrating characteristic morphological features, defining the level and direction of obstruction, and assessing bowel viability. We present a case of retrograde jejunojejunal intussusception causing high-grade mechanical small bowel obstruction several years after RYGB, highlighting radiological findings and their impact on surgical management.