Intussusception is one of the commonest causes of intestinal obstruction in infants and accounts for about 700 hospital admissions each year in England and Wales. Improved results of treatment have followed recent technological developments, which include ultrasonographic imaging and pneumatic reduction techniques. Most intussusceptions can be reduced successfully without the need for operation but close cooperation between surgeon and radiologist is essential. Mortality and morbidity rates from the condition have progressively declined in recent decades but avoidable deaths still occur.