A 3-year-old boy presents with intermittent abdominal pain, currant jelly stools, and a palpable abdominal mass. Ultrasound shows a 'target sign' or 'doughnut sign.' On contrast enema, there is a coiled-spring appearance in the right upper quadrant. This condition is most commonly caused by which lead point in this age group?
- A Meckel diverticulum
- B Hypertrophied Peyer patch (idiopathic) ✓
- C Intestinal polyp
- D Lymphoma
Correct answer: B. Hypertrophied Peyer patch (idiopathic)
Explanation
In children aged 3 months to 3 years, intussusception is most commonly idiopathic, caused by hypertrophied Peyer patches in the terminal ileum (often following a viral illness). Meckel diverticulum, polyps, and lymphoma are lead points more commonly seen in older children or adults. The coiled-spring sign on contrast enema reflects barium trapped between the intussuscipiens and intussusceptum.
Reference: Pediatric Radiology, Swischuk, 4th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.