Diseases of the esophagus.
D000375:Aging; D004935:Esophageal Diseases / Q000503:physiopathology; D004947:Esophagus / Q000294:innervation / Q000502:physiology / Q000648:ultrastructure; D006801:Humans; D009092:Mucous Membrane / Q000502:physiology; D012106:Research