"A new predictive tool that could help patients with breast cancer and certain lung cancers decide whether follow-up treatments are likely to help is being developed by researchers. The findings offer insight into helping patients assess treatment risk. Radiation therapy and chemotherapy that can destroy tumors also can damage surrounding healthy tissue. So with an appropriate test, patients could avoid getting additional radiation or chemotherapy treatment they may not need."
Editor's note: This study was performed in mice, so it will be several years before patients can benefit from it. However, doctors are already using molecular testing to guide treatment decisions, often for patients with advanced lung cancer. For early-stage patients, the Pervenio test can help determine whether lung cancer is likely to return after surgery, which can let doctors know to consider preventive ("adjuvant") treatments.