To Observe the Benefit of Adding Brachytherapy After CCRT on Resectable Esophageal Cancer Patients Without Surgery

Brachytherapy protocol starts within 2 weeks after consolidative EBRT, subjects who are enrolled will receive brachytherapy with specified balloon applicator. High-dose-rate (HDR) brachytherapy system will be used in the treatment, 5-Gy per fraction is delivered to the pre-treatment esophageal length of primary tumor(s), second treatment if applicable will be finished within 2 weeks after the first one, a total of 5-10Gy in 1-2 fractions will be delivered.

The device is intended for use with commercially available afterloader during brachytherapy. The purpose of the device is for delivery of radioactive source to the esophagus. This device is sterile, disposable and single-use.