Pathology The congenital abnormality of the ileum illustrated below A Is present in approximately 20% of normal persons B Is lined by heterotopic gastric mucosa in less than 2% of cases C Often shows mucosal ulceration D Is related to persistence of the vitellointestinal duct 💡 Explanation The congenital abnormality of the ileum illustrated below ✓ Correct Answer: D. Is related to persistence of the vitellointestinal duct