We have observed five children with cystic fibrosis, who presented ove
r 2 months, with meconium ileus equivalent that failed to respond to m
edical management. At surgery, four had a stricture in the ascending c
olon, and all had histopathological changes of post-ischaemic ulcerati
on repair, with mucosal and submucosal fibrosis. The only common chang
e in the management of these children was a switch from conventional e
nteric-coated pancreatic enzymes to high-strength products 12-15 month
s before presentation.