IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-10-4-34647 Original Research Paper Retrograde Duodenojejunal intussusception caused by duodenal polyp - a rare case report Anuradha Chaudhary Dr. Dr Devendra Chaudhary Dr. Dr Arvind Rai Dr. April 2021 10 4 01 02