 After identification of eosinophilic inflammation of the esophagus - differentiation between GERD and eosinophilic esophagitis via pHMII-measurements or PPI-trial - High-resolution manometry HRM for evaluation of esophageal motility in patients with eosinophilic esophagitis exclusion of GERD-patients- initiation of budesonide-therapy - after eight weeks of therapy reevaluation of esophageal motility by HRM 