NSUN4 and squamous cell lung carcinoma: Meanwhile, based on the degree of tumor immune cell infiltration and different m5C regulators, it has been discovered that NSUN3 is closely related to CD8+ T cells, while NSUN4 is closely related to neutrophils, confirming that m5C can regulate the tumor immune microenvironment to predict the prognosis of lung squamous cell carcinoma (67).