DFS	Disease-free survival
ECM	Extracellular matrix
EMT	Epithelial-mesenchymal transition
HNSCC	Head and neck squamous cell carcinoma
MMP	Matrix metalloproteinase
MMP8	Matrix metalloproteinase 8
MMPI	Matrix metalloproteinase inhibitor
OS	Overall survival
OSCC	Oral squamous cell carcinoma
OTSCC	Oral tongue squamous cell carcinoma
PMN	Polymorphonuclear neutrophils
RFS	Recurrence- or relapse-free survival
SCC	Squamous cell carcinoma
SNP	Single nucleotide polymorphism
TGF-β1	Transforming growth factor β1
TIMP-1	Metalloproteinase inhibitor 1
VEGF-C	Vascular endothelial growth factor C