A 68-year-old man presented at Pacific institute of medical sciences emergency department in May 2023 with pain in the epigastric region. Physical examination revealed no pertinent findings. Blood and urine tests were normal, and erect abdominal x-ray revealed a distended small intestine. CT scan shows ileo-colic intussusception. During laparotomy a large mass of 5x5 cm in size was detected in the caecum. It is very important to do CT scan for patients with long- standing abdominal pain and vomiting to achieve a definitive diagnosis of intussusception.