SBRT Followed by Chemoimmunotherapy of Toripalimab Plus Docetaxel and Cisplatin for Larynx Preservation in Patients with Locally Regionally Advanced Squamous Cell Carcinoma of the Larynx and Hypopharynx

All participants will receive SBRT (18Gy/3 fractions, QOD ) to gross tumor and metastatic lymph nodes, followed by neoadjuvant chemoimmunotherapy of Toripalimab (240mg) Plus Docetaxel (75mg/m2, q3w) and Cisplatin (75mg/m2, q3w) for 3 cycles. If tumor has complete or partial response at 2 weeks after the last course of neoadjuvant chemotherapy, participants will then receive intensity modulated radiotherapy (54Gy/27 fractions). If tumor is stable or progressive, participants will receive radical resection with or without postoperative intensity modulated radiotherapy when necessary.