Intussusception of the initial jejunum secondary to adenoma in the third and fourth portions of the duodenum: A case report.

Adult intussusception is a rare condition and is typically asymptomatic, although it can manifest as bowel obstruction, posing diagnostic challenges. Gastrointestinal tumors are a significant etiology for adult intussusception, predominantly affecting the ileocecal segment and ileum. To the best of our knowledge, the occurrence of intussusception in the initial jejunum vicinity near the Treitz ligament is exceedingly rare. The current study presents a case of initial jejunum intussusception, characterized by persistent epigastric pain but no palpable masses and normal bowel sounds. Abdominal computed tomography and magnetic resonance imaging revealed evidence of left upper abdominal intestinal obstruction, prompting surgical intervention for symptom alleviation and diagnostic confirmation. The current report aims to raise awareness of this unusual anatomical location of intussusception and to emphasize the importance of timely imaging and surgical intervention in achieving accurate diagnosis and effective management.