Graphical Abstract (IMAGE) Walter and Eliza Hall Institute Caption After successful surgery to remove a bowel cancer this new blood test can detect small fragments of cancer DNA in the blood in a small percentage of patients with stage 2 colon cancer, which indicate the presence of otherwise undetectable cancer cells (micrometastases) in the body, which will grow into metastatic cancers if not treated with chemotherapy Credit WEHI Usage Restrictions N/A License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.