Intra-luminal Radiofrequency Ablation for Inoperable Malignant Biliary Stenosis

The HabibTM EndoHPB (EMcision Ltd., UK) catheter which was used for the endobiliary radiofrequency ablation (RFA) treatment is an endoscopic bipolar catheter designed to ablate tissue in malignant tumors within luminal structures. HabibTM EndoHPB has Food and Drug Administration (FDA) and European Conformity approval for such indications. It has also approved by Ministry of Health and Welfare in 2016. In this study, the investigators will perform intra-luminal RFA for 20 inoperable patients with malignant biliary stenosis. HabibTM EndoHPB will be deployed via an endoscopic retrograde cholangiopancreatography (ERCP) route. By using radiofrequency energy to heat the tissue in the duct prior to insertion of the stent, the surrounding tissue becomes coagulated and this may delay tumor growth and the time before the stent lumen becomes occluded. If stent occlusion occurs in a participant during the follow up period, the participant will be reassessed and investigations will be used to determine cause of stent occlusion and whether it is appropriate to repeat RFA treatment. The aim will be to detect an improvement in survival and safety in the treated patients compared to patient receiving palliative treatment recorded in literatures.