Painful, debilitating and potentially dangerous: treating cancer metastases in the lungs through conventional methods is fraught with challenges. A new treatment, however, promises to revolutionise the process by using a remote, robotically controlled system to deliver a catheter into delicate areas of the lungs, where it can destroy the cancer cells precisely and effectively using microwave energy. Entirely non-invasive and in most cases pain-free, the system has delivered impressive results in early trials, successfully treating several patients with multiple lung metastases.