Retrograde flow of gastric juice (GASTRIC ACID) and/or duodenal contents (BILE ACIDS; PANCREATIC JUICE) into the distal ESOPHAGUS, commonly due to incompetence of the LOWER ESOPHAGEAL SPHINCTER.

Synonyms: Gastro-Esophageal Reflux Reflux, Gastro-Esophageal Acid Reflux, Gastric Esophageal Reflux Gastro-oesophageal Reflux Gastroesophageal Reflux Reflux, Gastroesophageal Gastro Esophageal Reflux Reflux Disease, Gastro-Esophageal Reflux, Gastro-oesophageal GERD Reflux, Gastric Acid Gastro oesophageal Reflux Gastroesophageal Reflux Disease Gastro-Esophageal Reflux Diseases Gastro Esophageal Reflux Disease Gastric Acid Reflux Disease Gastro-Esophageal Reflux Disease Gastric Acid Reflux