What is extrinsic compression in the gastroesophageal junction?

Extrinsic compression in the gastroesophageal junction refers to the pressure exerted on the esophagus from surrounding structures, which can hinder the normal passage of food and liquids into the stomach. This compression may be caused by conditions such as tumors, lymphadenopathy, or anatomical abnormalities. Symptoms can include difficulty swallowing (dysphagia), chest pain, and regurgitation. Diagnosis often involves imaging studies and endoscopy to identify the source of the compression.