Conclusion
In conclusion, a rare complication following classic gastric bypass surgery is retrograde intussusception with a variety of presentations including colicky abdominal pain , constipation ,nausea and vomiting ,and also upper gastrointestinal bleeding (hematemesis) just like our case that can cause misdiagnosis during management. We believe that this paper is the first jejunojejunal intussusception with hematemesis that reported in the literature following classical gastric bypass surgery. Clinicians should suspect the presence of intussusception after bariatric surgery even with fresh upper gastrointestinal bleeding presentation