[New treatment options in systemic therapy for breast cancer and associated new side effects].

Introduction: Breast cancer today has a significantly better prognosis than two to three decades ago. Treatment options have improved significantly. However, new systemic therapy has also resulted in side effects that clinicians must first become familiar with in order to be able to treat them optimally. This article gives an overview of the most important innovations in the last 10 years in the field of systemic therapy in breast cancer and also shows the most important side effects and their management.