Oxygen-Boosting injection may help rectal cancer patients avoid surgery

This study tests whether injecting a special solution (KRC-01) into rectal tumors before radiation can make the radiation work better. The solution increases oxygen inside the tumor, which helps radiation kill cancer cells. About 24 adults with advanced rectal cancer that hasn't spread will receive this treatment along with standard chemoradiotherapy. The goal is to see if more patients can achieve a complete response and possibly avoid surgery.