Tumour treating fields (TTFields)

Patients with newly diagnosed glioblastoma who are fit and under about 70 receive six weeks of radiotherapy with daily temozolomide followed by six monthly cycles of temozolomide; this is still the backbone of treatment two decades later. Testing MGMT methylation identifies who benefits most and guides decisions in older patients. Median survival with the regimen remains only around 15-20 months, and no drug since has clearly improved on it, which is why glioblastoma is a priority for new approaches.