A 7-year-old girl presented with a history of prolonged diarrhoea of 10 weeks that progressed to frank haematochezia 2 weeks later. She also presented with abdominal pain and weight loss of over 8 weeks duration. Stool was initially watery, not offensive or mucoid. Bowel motions were about 10 times per day. There was no vomiting, fever, jaundice, mouth ulcer or joint pains. The abdominal pain was crampy, diffusely localized to the umbilical and supra-pubic regions.

It was neither aggravated nor relieved by any known factors. Pain did not radiate elsewhere nor, disturb the patient from sleep, associate with tenesmus or abdominal distension. The symptoms were however associated with a significant weight loss despite good appetite and adequate feeding. There were no associated respiratory and urinary symptoms. PMH: Investigated and treated for dysentery with a course of metronidazole,…