Eosinophilic Esophagitis — Trachealization and Furrows

A 24-year-old man with a 10-year history of asthma and atopic dermatitis presents with a 1-year history of intermittent solid-food dysphagia and two episodes of food bolus impaction requiring endoscopic disimpaction. He reports heartburn unresponsive to high-dose PPI therapy. Upper endoscopy reveals concentric esophageal rings ("trachealization"), longitudinal linear furrows, scattered white plaques, pale mucosa, and decreased caliber. Esophageal biopsies from proximal and distal esophagus show ≥15 eosinophils per high-power field with eosinophil microabscesses, basal zone hyperplasia, and lamina propria fibrosis. The endoscopic findings marked **C** in the diagram are consistent with which diagnosis?