esophageal squamous cell carcinomaesophageal squamous cell canceresophageal carcinoma treatmentsquamous vs nonsquamousesophagus inflammation treatmentesophagus esophagitisirritated esophagusesophagus dysmotilityesophageal inflammation treatmentesophageal eosinophiliaeosinophilic esophagitisesophageal infection