Intermittent, paroxysmal episodes of severe colicky abdominal pain (in early disease the child may appear well in between episodes). In infant populations episodes may be observed as a distressed inconsolable child and there may be drawing up of the legs. Vomiting which is often bilious. Mucus per rectum or the typical ‘redcurrant jelly stools’. Peritonism, signs of sepsis, and shock are features of late disease and are suggestive of perforation.
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