Neoadjuvant Sacituzumab Govitecan Plus Tagitanlimab for Resectable Head and Neck Squamous Cell Carcinoma

The goal of this clinical trial is to evaluate the anti-tumor activity, safety and tolerability of the combination of Sacituzumab govitecan and Tagitanlimab as neoadjuvant therapy in patients with resectable head and neck squamous cell carcinoma (HNSCC). It will also explore potential biomarkers related to the efficacy of this combined therapy. The main questions it aims to answer are: Does the combination of Sacituzumab govitecan and Tagitanlimab improve the major pathological response rate (MPR) in patients with resectable HNSCC? What adverse reactions (side effects) do participants experience when receiving this combined neoadjuvant therapy? Does this combined therapy improve participants' objective response rate (ORR), survival time and quality of life? This is a single-arm, open-label, prospective Phase II clinical study conducted at West China Hospital of Sichuan University. A total of 30 eligible patients will be enrolled, and no placebo control will be used. The study will evaluate the efficacy and safety of the combined therapy by monitoring clinical indicators, pathological results and adverse events throughout the trial. Participants will: Receive Sacituzumab govitecan (5mg/kg) and Tagitanlimab (900mg) intravenously every 2 weeks, for a total of 2 treatment cycles. Patients will undergo surgical resection 3-6 weeks after completion of neoadjuvant therapy. Adjuvant therapy (concurrent chemoradiotherapy or radiotherapy alone) will be administered according to pathological risk factors, together with 15 cycles of Tagitanlimab as adjuvant immunotherapy. Visit the clinic regularly for physical examinations, laboratory tests (such as blood routine, liver and kidney function), imaging examinations (such as head and neck MRI/CT) and safety checkups according to the study schedule. Provide biological samples (peripheral blood, tumor tissue, saliva, feces) at specified time points for biomarker detection. Complete quality-of-life questionnaires (such as E