Statistical analysis has shown that the new cases and deaths worldwide for oral cancer ranked 18th and 15th among all malignant tumors in 2018 (Bray et al., 2018). As one of the most common and representative types of oral cancer, oral squamous cell carcinoma (OSCC) has become a growing health concern. The survival outcome of OSCC is remaining poor, and existing reports show that its 5-year survival is about 50% (Zhang et al., 2015). Even in the early stage (cT1-2N0), OSCC patients are prone to occur local-regional recurrence and distant metastasis, which may lead to poor prognosis (Zhan et al., 2018). It has been reported that the 5-year survival rate for early-stage OSCC after surgery is approximately 70% (Ellis et al., 2017;Sowder et al., 2017). To improve patient survival, it is necessary to investigate new noninvasive and easily accessible biomarkers for predicting the prognosis of cT1-2N0 OSCC and guiding their treatment.In 1863, Rudolf Virchow firstly explained the relationship between inflammation and cancer. Over the past few decades, we had an understanding of the inflammatory microenvironment of malignant tissues and utilized the link between cancer and inflammation for tumor prevention and treatment (Balkwill & Mantovani, 2001).