PHC	Perihilar cholangiocarcinoma
AJCC	American Joint Committee on Cancer
TNM	tumor node metastasis
HPB	hepato-pancreato-biliary
CT	computed tomography
MRI	magnetic resonance imaging
MRCP	magnetic resonance cholangiopancreatography
EBD	Endoscopic biliary drainage
PTBD	Percutaneous transhepatic biliary drainage
PVE	portal vein embolization
CLR	caudate lobe resection
ASA	American Society of Anesthesiologists
CEA	carcinoembryonic antigen
CA	Cancer Antigen
IQR	interquartile range
ANOVA	Analysis of variance
OS	overall survival
HR	hazard ratio
CI	confidence interval
AUC	Area under the curve
ROC	Receiver operating characteristic curve
PVR	Portal vein resection
LN	Lymph node
MLN	Metastasic lymph node
HLT	Hoshmer-Lemeshow test
UICC	International Union Against Cancer