During the period 1961–70,283 patients in the Glasgow region have been studied with regard to the outcome of 418 surgical procedures performed for Crohn's disease.
Resection was followed by an overall recurrence rate of 33 per cent, but in disease confined to the large bowel the rate was 18 per cent.
Exploratory operations and bypass procedures were followed by a recurrence rate of 70 per cent. Evidence is provided that recurrence following bypass procedures for small bowel disease and ileocolitis occurs at a later stage than after exploratory operations alone.
By the end of the study period 77 per cent of patients in this series had required one or more resections.