Locally advanced esophageal cancer presents a challenge to medical, surgical, and radiation oncologists. The current AJCC staging now classifies cancers of the esophagus as including tumors involving the cervical and thoracic esophagus, the gastroesophageal junction (GEJ), and GEJ cancers with up to 5 cm extension into the stomach
http://journals.lww.com/oncology-times/blog/HowDoITreat/pages/post.aspx?PostID=19