Lower esophageal web.
D003251:Constriction, Pathologic; D003679:Deglutition; D003680:Deglutition Disorders / Q000209:etiology*; D004935:Esophageal Diseases; D004940:Esophageal Stenosis; D004947:Esophagus; D006801:Humans; D006965:Hyperplasia; D006984:Hypertrophy
DEGLUTITION DISORDERS/etiology and pathogenesis; ESOPHAGUS/stenosis; HYPERTROPHY AND HYPERPLASIA