Blood test may personalize chemo for colorectal cancer patients

This study tests whether using a blood test that detects tumor DNA can help doctors decide how long chemotherapy should last for people with certain types of colorectal cancer. About 340 adults with stage II or low-risk stage III colorectal cancer will be randomly assigned to standard chemo for 3 months or a personalized plan based on their blood test results. The goal is to see if the personalized approach improves the chance of staying cancer-free for 2 years.