CD68	Cluster of differentiation 68 (pan-macrophage marker)
CD80	Cluster of differentiation 80 (M1 macrophage marker)
CD163	Cluster of differentiation 163 (M2 macrophage marker)
DAB	3,3′-Diaminobenzidine
DOI	Depth of invasion
FFPE	Formalin-fixed, paraffin-embedded
HPF	High-power field
HRM	Histologic risk model (Brandwein–Gensler classification)
IFG	Infiltration/growth pattern (Bryne’s classification)
IHC	Immunohistochemistry
IQR	Interquartile range
LHR	Lymphocytic host response
M0	Undifferentiated (non-polarized) macrophage
M1	Classically activated macrophage
M2	Alternatively activated macrophage
OL	Oral leukoplakia
OPMD	Oral potentially malignant disorder
OSCC	Oral squamous cell carcinoma
PD-L1	Programmed death-ligand 1
PNI	Perineural invasion
STAT1	Signal transducer and activator of transcription 1
TAM	Tumor-associated macrophage
Th1	T helper type 1
Th2	T helper type 2
TMA	Tissue microarray
TME	Tumor microenvironment
WHO	World Health Organization
WPOI	Worst pattern of invasion