| Bismuth classification |
| Clinical manifestation | Methods | cases |
| Type I | Low CBD stricture, with a length of the common hepatic duct stump of >2 cm. | Abdominal pain, fever, jaundice | Ultrasound or CT | 9 |
| Type II | Proximal CBD stricture-hepatic duct stump < | Abdominal pain, fever, jaundice | Ultrasound or CT | 12 |
| Type III | Hilar stricture, no residual CBD, but the hepatic ductal confluence is preserved. | Bileleakageor bile peritonitis | ERCP or PTC | 4 |
| Type IV | Hilar stricture, with involvement of confluence and loss of communication between right and left hepatic duct. | Bile leakage or bile peritonitis | ERCP or PTC | 3 |
| Type V | Involvement of aberrant right sectoral hepatic duct alone or with concomitant stricture of the CBD. | Reccurent cholangitisor bile peritonitis | ERCP | 3 |