<unk>  is defined as chronic symptoms due to damage to the esophageal mucosa as a result of  abnormal<unk>  of acidic stomach contents into the esophagus.  This is commonly due to transient or permanent changes in the barrier between the esophagus and the stomach. This can be due to incompetence of the lower esophageal sphincter (LES), transient LES relaxation, impaired expulsion of gastric<unk>  from the esophagus, or a hiatal hernia.  Chronic<unk>  is associated with an increased risk of Barrett's esophagus which is a premalignant condition of the esophageal mucosa which is in turn associated with an increased risk of adenocarcinoma of the esophagus.
Gastroesophageal reflux disease
Peanut allergy
Odynophagia electrocardiogram
Helicobacter pylori infection
Esophageal candidiasis
Esophageal motility disorder
Atrophic gastritis
Barrett's esophagus