Lesions observed by cholangioscopy Lesions n Rate% Stone 99 92, 5 Stone + ascaris lumbricoides 3 2, 8 Stone lived in a biliary sac 1 0, 9 Cholangitis 28 26, 2 Biliary Stenosis 6 5, 6 There were 4 cases, stones were extracted fulfilled immediately by Mirizzi, so there was no stone when performed cholangioscopy.