All patients will subjected to the followings: patients were selected by randomization method, full history taking, Complete physical examination, laboratory investigations (complete blood picture, liver and kidney functions, coagulation profile, tumor marker tests, serum electrolytes), patients were assessed radio-logically by abdominal x- ray , abdominal ultrasound, pelvic and abdominal CT. For patients in EG, we began with assessment of the site \& lenght of stricture . In this study, we used fully covered self expanded metallic biliary stent. For patients in SG, we usually did gastrotomy feeding tube, excision and re-anastomosis, or did esophageal replacement surgery
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incidence of recurrence of stenosis
Timeframe: within one week after the endoscopy