Novartis’s Kisqali (rivociclib), a latecomer CDK4/6 inhibitor used in metastatic breast cancer, is taking on an unexplored path, away from other CDK4/6 inhibitors. The drug has demonstrated efficacy in aggressive forms of breast cancer, which had not been attempted by other CDK 4/6 inhibitors. Aggressive breast cancers appear relatively often in Korea where the proportion of younger aged patients is large, but the patients’ only available option was to use highly toxic chemotherapy.

In a recent interview with Dailypharm, Seock-Ah Im, Professor of Hemato-Oncology at Seoul National University Hospital said, “Younger breast cancer patients have a higher probability of accompanying visceral metastasis beca