A Prospective Randomized Study for Efficacy of Uncovered Double Bare Metallic Stent Compared to Uncovered Single Bare Metallic Stent in Malignant Biliary Obstruction

Our study is the prospective randomized study for efficacy of uncovered double bare metallic stent compared to uncovered single bare metallic stent in malignant biliary obstruction

Inclusion Criteria:

• The patients who had malignant biliary obstruction

Exclusion Criteria:

• The patients who had resectable biliary malignancy
• The patients who had hilar obstruction
• The patients who had duodenal obstruction
• The patients who had other malignancy which is not related to biliary obstruction
• The patients who had uncontrolled infection
• The patients who had poor performance (ECOG =3 or 4)
• The patients who were not acquired informed consent
• The patients who had technically difficult structure for ERCP