CCA	Cholangiocarcinoma
CHCC-CCA	Combined hepatocellular-cholangiocarcinoma
DCCA	Distal cholangiocarcinoma
FFPE	Formalin fixed paraffin embedded
HCC	Hepatocellular carcinoma
ICCA	Intrahepatic cholangiocarcinoma
MIF	Multiplex Immune Fluorescence
NFD	Nerve fib er density
OS	Overall survival
PCCA	Perihilar cholangiocarcinoma
PD-1	Programmed Death receptor
PD-L1	Programmed Death Ligand 1
PD-L2	Programmed Death Ligand 2
PGP 9.5	Protein gene-product 9.5
PNI	Perineural invasion
RFS	Recurrence-free survival
ROI	Region of interest
TME	Tumor microenvironment