Percutaneous endoscopic jejunostomy (PEJ) is a minimally invasive procedure used to provide long-term enteral nutrition directly into the jejunum, bypassing the stomach and duodenum. It is typically indicated for patients who have functional gastrointestinal tracts but are unable to consume food orally due to conditions such as severe gastroesophageal reflux, gastric outlet obstruction, or pancreatitis.