Surgery · UKMLA & AKT

Intussusception

A free high-yield preview for the UKMLA Applied Knowledge Test. Below are the key points to recognise intussusception — the full SA Note notes add investigations, management, complications and 10 practice questions.

Key high-yield points

  • Proximal bowel (intussusceptum) telescopes into distal bowel (intussuscipiens) causing obstruction and vascular compromise
  • Most common in infants aged 3 months - 2 years; peak 5-9 months; 2x more common in boys
  • Majority idiopathic (hypertrophy of Peyer's patches post-viral); beyond age 2, pathological lead point more likely
  • Most common site: ileocolic (ileocaecal junction)
  • Pathological lead points: Meckel's diverticulum (most important), polyps, lymphoma, HSP submucosal haematoma

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