Oral Viscous Budesonide in Anastomotic Stricture After Esophageal Atresia Repair (OVB in EA)

Inclusion Criteria: * Children aged \> 1 month to 3 years * Operated for an esophageal atresia of all types except pure TEF. * Presence of an anastomotic stricture defined according to experts recommendations : * a relative esophageal narrowing at the level of the anastomosis, * demonstrated by a contrast study and/or an endoscopy * with significant functional impairment and associated symptoms requiring dilation. * Symptoms include: feeding or swallowing difficulties, coughing and choking during feeds, food impaction, regurgitation/vomiting of undigested food, drooling. In very young patients: apnea and food refusal. * Receiving an ongoing treatment by PPI 1 to 2 mg/kg die * Informed parental consent Exclusion Criteria: * Known immune deficiency * Acute respiratory or intestinal infection * Severe respiratory, cardiac or neurological condition precluding OVB or placebo swallowing * Child fed exclusively via nasogastric tube or gastrostomy * Absence of parental consent