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This study examines pre-surgery (neoadjuvant) Tislelizumab combined with chemotherapy in patients with locally advanced, microsatellite stable (MSS) rectal cancer. It enrolls patients aged 18-70 who have not received prior anti-tumor treatment. The study is in Phase 2 and is currently recruiting participants.
The summary above is a plain-language rendering of the official record. The original English title is shown for reference.
Criteria are reproduced from the ClinicalTrials.gov record in the original English. Only the trial team can determine eligibility.
Inclusion Criteria: * Age ≥18 years old and ≤70 years old. * Pathologically diagnosed MSS ((confirmed by microsatellite stable detection or next-generation target sequencing) or (confirmed by immunohistochemistry)) colon adenocarcinoma. * The lower edge of the tumor is less than 12cm from the anus as measured by colonoscopy and MRI,or TRUS. * It was confirmed by magnetic resonance imaging (MRI) or intracavitary ultrasound of the rectum as T3-4 or N+, and M0 by enhanced CT. * The ECOG physical status score is 0-1. * Life expectancy is expected to be more than 1 year. * First diagnosis, no previous anti-tumor treatment received, and no chemotherapy contraindications. * Appropriate organ function is defined as follows: Hemoglobin level ≥ 90g/L, Neutrophil count ≥ 1.5×10\^9/L, Platelet count ≥ 75×10\^9/L, Serum total bilirubin ≤ 1.5× the upper limit of normal (UNL), Aspartate aminotransferase (AST) ≤ 2× UNL, Alanine aminotransferase (ALT) ≤ 3× UNL, Serum creatinine ≤ 1.5× UNL. * Informed consent, able to understand the study protocol and willing to participate in the study, and will provide written informed consent. Exclusion Criteria: * Early rectal cancer (T1-2N0M0); The lower margin of the tumor was less than 5cm from the anus and T4. APR(combined abdominal perineal resection) is required; * Multifocal colorectal cancer. * Tumor obstruction or high risk of obstruction, bleeding, and/or perforation requiring emergency surgery or stent placement. * Cannot tolerate chemotherapy or immunotherapy, such as but not limited to bone marrow suppression. * History of malignant tumors, except for basal cell carcinoma, papillary thyroid carcinoma, and various in situ cancers. * Acute exacerbation of important organ diseases (such as but not limited to COPD, coronary heart disease, and renal insufficiency) and/or severe acute infectious diseases (such as but not limited to hepatitis, pneumonia, and myocarditis), ASA score \> 3 points. * Mental disorders, illiteracy, or language communication barriers that prevent the understanding of the study protocol. * Peripheral sensory neuropathy, unable to receive oxaliplatin-based chemotherapy. * Continuous use of glucocorticoids for more than 3 days within 1 month prior to signing the informed consent form, or having comorbidities requiring the use of glucocorticoid therapy. * Unable to undergo enhanced CT examination * Pregnancy or lactation. * Refused to participate in this study. * Other situations in which the researcher deems unsuitable for this study.