Increased expression of NAIP [RFS: HR = 2.14 (1.01–4.55), P = 0.043], BIRC2 [RFS: HR = 3.81 (1.53–9.49), P = 0.0021], and BIRC7 [RFS: HR = 2.09 (0.99–4.43), P = 0.048] was related to unfavorable RFS in HNSCC patients (Figure 4B). Here, NAIP is linked to head and neck squamous cell carcinoma.