Comparison of Postoperative Anal Function Between Parks and Bacon Techniques in Low Rectal Cancer

This study is comparing two surgical techniques used in low rectal cancer operations — the Parks technique and the Bacon technique — to see which one leads to better bowel and anal function after surgery. The cancer must be very close to the anal opening (within 3 cm of the dentate line). **You may be eligible if...** - You are between 18 and 75 years old - You have been diagnosed with rectal cancer (confirmed by pathology) - Your tumor is within 3 cm of the dentate line (as seen on MRI) - Your cancer has no local complications like blockage or severe invasion - You are considered suitable for bowel-preserving (anal-sparing) surgery - Your organ function is adequate for surgery and anesthesia **You may NOT be eligible if...** - You have a history of other colorectal cancers - You have an emergency complication like a bowel blockage or severe bleeding - Your cancer has already spread to other parts of the body - You have had prior rectal surgery or radiation to the pelvis Talk to your doctor to see if this trial is right for you.