title: Gastrointestinal disease
context: Oesophageal diseases include a spectrum of disorders affecting the oesophagus. The most common condition of the oesophagus in Western countries is gastroesophageal reflux disease,[2] which in chronic forms is thought to result in changes to the epithelium of the oesophagus, known as Barrett's oesophagus.[3]:863–865
question: What is the most common gastrointestinal disorder in the U.S.?
answers: gastroesophageal reflux disease