Dave Fredrickson, Executive Vice President, Oncology Business Unit, AstraZeneca, said: “Historically, patients with breast cancer who have tumours with low levels of HER2 expression have been classified as HER2-negative, giving them limited treatment options beyond chemotherapy. This approval reinforces the important role Enhertu may have for patients with HER2-low disease and highlights the need to evolve the way breast cancer is treated to improve patient outcomes.”