Tumor Local Excision +Postoperative Adjuvant Chemoradiotherapy for T1-2N0M0 Low/Ultra-Low Rectal Cancer

This study is for people with early-stage rectal cancer (stage I) who are located low in the rectum and want to avoid a major operation that would remove the rectum entirely. The study tests whether a less invasive local surgery (removing just the tumor) followed by radiation and chemotherapy can effectively treat the cancer while preserving the patient's bowel. **You may be eligible if...** - You are 18 years or older - You have been diagnosed with stage I rectal cancer (limited to the rectal wall, no spread to lymph nodes or elsewhere) - Your tumor is located within 8 cm of the anal opening - You strongly prefer to avoid removal of the rectum (abdominoperineal resection) - Your surgeon has confirmed a local removal is technically possible **You may NOT be eligible if...** - You have significant cognitive issues or psychiatric conditions - You are unable to tolerate radiation and chemotherapy - You refuse to sign informed consent Talk to your doctor to see if this trial is right for you.