Localized narrowing of esophagus

Common: Achalasia; Aortic knob; Congenital esophageal atresia; Congenital esophageal stenosis; Duplication cyst; Esophageal carcinoma; Esophageal leiomyosarcoma; Esophageal stricture; Fundoplication; Gastrointestinal stromal tumor; Inferior esophageal sphincter; Left main stem bronchus; Leiomyoma; Lipoma; Lower esophageal spasm; Muscular ring; Normal sling fibers of diaphragm; Postgastrectomy alkaline reflux esophagitis; Repair of esophageal atresia; Repair of hiatal hernia; Right aortic arch; Schatzki ring; Thoracic aortic aneurysm; Thoracic aortic tortuosity; Web or diaphragm of esophagus
Uncommon: Actinomycosis; Allergic reaction to nasogastric tube; Behçet disease; Benign mucous membrane pemphigoid; Candidiasis; Cartilaginous ring; Crohn disease; Endoscopic perforation; Eosinophilic esophagitis; Epidermolysis bullosa; Esophageal varices; Graft-versus-host disease; Herpes simplex; Histoplasmosis; Intramural esophageal pseudodiverticulosis; Mallory-Weiss syndrome; Metastasis or direct spread from adjacent malignancy; Peptic esophageal ulcer; Postinstrumentation stricture; Sclerotherapy of esophageal varices; Syphilis; Tuberculosis; Tylosis; Zollinger-Ellison syndrome