Oedema of the ileum: a possible manifestation of food allergy.

The mechanisms whereby adverse reactions to food cause gastrointestinal symptoms are poorly understood. In most cases of food allergy there are no reliable radiological, histological, or immunological abnormalities on which to base the diagnosis, which depends on subjective improvement of symptoms on withdrawal of the offending agent with or without a subsequent positive reaction to challenge. We report a case ofpresumed food alergy with clear cut reversible radiological changes in the mucosa of the small bowel.