Achievement of duodenal ulcer remission by vedolizumab in children with eosinophilic gastroenteritis.

Eosinophilic gastrointestinal disorders (EGIDs) are treated with corticosteroids and food allergen elimination. However, treatment for refractory cases is not standardized. We demonstrate the efficacy of vedolizumab, an anti-α4β7 integrin agent, in 2 children with duodenal ulcers developed by non-eosinophilic esophagitis EGIDs. In both, vedolizumab was used continuously without side effects, and long-term remission has been durable. Duodenal ulcers associated with EGIDs are increasing. Vedolizumab has potential as a treatment for even upper gastrointestinal lesions in refractory EGIDs.