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©2013 UpToDate ® Print Email AJCC regions of the esophagus The American Joint Committee on Cancer (AJCC) divides the esophagus into four areas. The cervical esophagus extends from the lower border of the cricoid cartilage to the thoracic inlet. The upper thoracic esophagus extends from the thoracic inlet to the tracheal bifurcation. The mid-thoracic esophagus extends from the tracheal bifurcation to a level approximately 32 cm from the incisors. The lower thoracic and abdominal esophagus extends from the mid-thoracic esophagus to the EG junction, approximately 40 cm from the incisors. Data from: Esophagus. In: AJCC Cancer Staging Manual, 6th edition, 2002.