Randomized Controlled Study of Plasma ctDNA Methylation-Guided Adjuvant Chemotherapy in Stage I/Low-Risk Stage II Colorectal Cancer

Exclusion Criteria

• •1. Receipt of neoadjuvant therapy prior to surgery;
• •2. Blood transfusion during surgery or within 2 weeks prior to surgery;
• •3. Pregnant or breastfeeding women, or individuals of reproductive potential who are not using adequate contraception;
• •4. History of other malignancies within the past 5 years, except for adequately treated carcinoma in situ of the cervix or non-melanoma skin cancer;
• •5. Uncontrolled primary brain tumors or central nervous system metastases, or presence of significant intracranial hypertension or neuropsychiatric symptoms;
• •6. Presence of severe or uncontrolled comorbidities, including but not limited to:Severe cardiac disease that remains unstable despite treatment, including myocardial infarction, congestive heart failure, unstable angina, symptomatic pericardial effusion, or unstable arrhythmia within 6 months prior to enrollment; Clearly diagnosed neurological or psychiatric disorders, including dementia or seizure disorders;Severe or uncontrolled infections;Active disseminated intravascular coagulation (DIC) or significant bleeding tendency;Significant impairment of major organ function; Any other condition that, in the opinion of the investigator, would make the patient unsuitable for participation in this study.