APPARENTLY first announced from West Africa by Majekodunmi in 1948, and discussed by Joly and Thomas from Ibadan in 1954, caecocolic intussusception was the second commonest abdominal emergency treated between 1958 and 1962 at this hospital, not much less often seen than strangulated hernia. This intussusception was a curious kind; it affected young people, mostly beyond the age associated with the infantile type, but at the same time younger than those usually afflicted by the large-bowel types, and always without the organic cause responsible in 80 per cent of the latter in temperate lands. With experience of the disease the clinical pattern has become distinct; and being very different from the picture that the word ' intussusception ' brings to mind outside the tropics, the details of IOO patients are considered here.
SERIES REPORTSex and Age.-Of the IOO cases, 52 patients were female, and the majority were under 15 years old.The average age of the females was 17
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