Focal lymphoid hyperplasia of the terminal ileum mimicking Crohn's disease.

Focal lymphoid hyperplasia of the terminal ileum is a rare cause of terminal ileitis. We describe the case of a 13-year-old boy with a stricture of the terminal ileum that was diagnosed as Crohn's disease on barium meal and follow through. This failed to resolve on steroid therapy and the boy eventually required resection of his terminal ileum. Pathology of the terminal ileum showed focal lymphoid hyperplasia and not Crohn's disease.