Objective Response Rate

This study is a prospective, single-arm, phase II exploratory clinical trial. The primary endpoint of this study is to evaluate the pathological complete response (pCR) rate after surgery and to assess the safety of neoadjuvant therapy with adebrelimab combined with platinum-based chemotherapy in patients with locally advanced resectable esophageal squamous cell carcinoma (ESCC) at the Second Qilu Hospital of Shandong University. The primary endpoint of this clinical trial is the pathological complete response (pCR) rate, defined as the absence of residual viable tumor cells in the resected specimen, including lymph nodes (ypT0N0M0). Secondary endpoints include the major pathological response (MPR) rate, objective response rate (ORR), treatment-related adverse events (TRAEs) and immune-related adverse events (irAEs), as well as quality of life (QOL) assessments during neoadjuvant immunochemotherapy (nICT). MPR is defined as less than 10% residual viable tumor cells in the primary tumor bed following neoadjuvant therapy and resection. ORR represents the percentage of patients achieving complete response (CR) or partial response (PR). Other secondary measures include the tumor downstaging rate, surgery rate, R0 resection rate (defined as no residual tumor at the resection margins), and perioperative complication rate. Furthermore, overall survival (OS) and relapse-free survival (RFS) are considered exploratory endpoints in this study. By evaluating these diverse endpoints, the investigators aim to comprehensively assess the efficacy, safety, and overall impact of the nICT approach in patients with locally advanced resectable ESCC. Additionally, it is planned to construct 20 pairs of esophageal squamous cell carcinoma and adjacent normal esophageal squamous epithelial organoids, laying the groundwork for future in-depth exploration of the mechanisms underlying esophageal carcinogenesis and progression, as well as functional studies of specific genes.

This prospective, single-arm, Phase II clinical trial aims to evaluate the efficacy and safety of tislelizumab combined with chemotherapy as neoadjuvant therapy and postoperative adjuvant immunotherapy in patients with skull base-invading head and neck squamous cell carcinoma. The primary objectives are to address the following questions: * What are the objective response rate and pathological response of tislelizumab combined with chemotherapy as neoadjuvant therapy in patients with skull base-invading head and neck squamous cell carcinoma? * Can neoadjuvant therapy convert unresectable skull base-invading head and neck squamous cell carcinoma into a resectable condition? * Can adjuvant immunotherapy after neoadjuvant therapy prolong patients' recurrence-free survival and overall survival? The researchers will administer neoadjuvant therapy (tislelizumab combined with chemotherapy) and adjuvant immunotherapy to patients with skull base-invading head and neck squamous cell carcinoma and assess the treatment's efficacy and safety. Participants will: * Receive neoadjuvant therapy every 3 weeks (tislelizumab 200mg on Day 1, nab-paclitaxel 260mg/m² on Day 1, cisplatin 75mg/m² on Days 1-3) for 3 cycles. * Undergo surgical treatment within 3 weeks after completing neoadjuvant therapy. * Receive (chemo)radiotherapy 4-6 weeks after surgery. * Receive adjuvant immunotherapy (tislelizumab 200mg) every 3 weeks after (chemo)radiotherapy for 8 cycles.