In the stratified survival analysis, STC2 was found to be linked with an unfavorable prognosis in HNSCC patients, whereas CCL2, CTSG, CD19, RBP5, ZAP70, and TNFRSF4 were associated with a favorable prognosis in these patients (Figure 3C). This evidence concerns the gene ZAP70 and head and neck squamous cell carcinoma.