OBJECTIVE: The study evaluates the efficacy of METHODS: In this prospective study, we compared the parameters of 63 patients with LA-HNSCC who underwent RESULTS: The SUVmean and TBRblood of the primary tumor were significantly lower in the responding group than in the non-responding group. Receiver operating characteristic (ROC) curve analysis identified SUVmean (area under the curve (AUC) = 0.931, p = 0.001) and TBRblood (AUC = 0.894, p = 0.001) as significant predictors of neoadjuvant chemoimmunotherapy efficacy. The study found that SUVmean, TBRblood, age, and Eastern Cooperative Oncology Group (ECOG) scores significantly correlated with short-term efficacy, while SUVmean was an independent predictor. CONCLUSION: In