Esophageal carcinoma is an aggressive disease with a poor prognosis. Surgical resection remains the basic method of management of this malignancy. Although different approaches have been described for the surgical resection of esophageal cancer, there is no statistical evidence based on large scale prospective randomized trials with regard to the issue that which is the optimal surgical approach for esophageal cancer. The purpose of this study is to test two different approach of transthoracic esophagectomy (Right Side Thoracotomy plus Midline Laparotomy Approach: Ivor-Lewis Procedure and Left Side Thoracotomy Approach: Sweet Procedure) in middle or lower third intrathoracic esophageal cancer. This research is being done to see whether one approach is superior than the other approach with better long-term outcome and acceptable postoperative short-term outcome or not.