Gastroesophageal Reflux, also known as gerd, is related to hernia, hiatus and esophagitis, and has symptoms including abdominal pain, constipation and diarrhea. An important gene associated with Gastroesophageal Reflux is CHAT (Choline O-Acetyltransferase), and among its related pathways/superpathways are GPCR downstream signalling and Signal Transduction. The drugs Acetylsalicylic acid and Zinc cation have been mentioned in the context of this disorder. Affiliated tissues include lung and tongue, and related phenotypes are esophageal neoplasm and gastroesophageal reflux