Gastroesophageal Junction Cancer is a type of cancer that occurs at the area where the esophagus meets the stomach. This region is known as the gastroesophageal junction. The cancer can develop in the cells lining this area and may affect swallowing and digestion. Symptoms often include difficulty swallowing, weight loss, and chest pain. Risk factors for this cancer include chronic acid reflux, obesity, and smoking. Diagnosis typically involves imaging tests and biopsies. Treatment options may include surgery, chemotherapy, and radiation therapy, depending on the stage of the cancer and the patient's overall health.