The sphincter that is a sphinx.
D000818:Animals; D004285:Dogs; D004941:Esophagitis / Q000209:etiology / Q000503:physiopathology; D004943:Esophagogastric Junction / Q000503:physiopathology*; D005764:Gastroesophageal Reflux / Q000209:etiology / Q000503:physiopathology; D006548:Hernia, Diaphragmatic / Q000503:physiopathology* / Q000601:surgery; D006801:Humans; D008365:Manometry; D008722:Methods; D009119:Muscle Contraction; D009130:Muscle, Smooth / Q000503:physiopathology