[THE CONTRACTILE RING OF THE HIATAL ESOPHAGUS. (WITH THE PRESENTATION OF A CASE ASSOCIATED WITH A FOREIGN BODY)].
D004935:Esophageal Diseases; D004940:Esophageal Stenosis; D004941:Esophagitis; D004945:Esophagoscopy; D004947:Esophagus; D005547:Foreign Bodies; D006801:Humans; D010336:Pathology; D013902:Radiography, Thoracic
ESOPHAGEAL DISEASES; ESOPHAGEAL STENOSIS; ESOPHAGITIS; ESOPHAGOSCOPY; ESOPHAGUS; FOREIGN BODIES; PATHOLOGY; THORACIC RADIOGRAPHY
EL ANILLO CONTR'ACTIL DEL ES'OFAGO HIATAL. (CON LA PRESENTACION DE UN CASO ASOCIADO A CUERPO EXTRA NO)