We assume that application of endobiliary RFA to the malignant stricture which results in considerable charring of the tumor would result in prolongation of Self-expandable metal Stent (SEMS) patency by decreasing tumor in-growth and overgrowth. It is further speculated that prolonged stent patency will improve the quality of life of these patients, prevent cholangitis and optimize chemotherapy. A further outcome may be an improvement in the survival.