Cristina Saura Manich, MD, PhD, Vall d’Hebron Institute of Oncology, Barcelona, Spain, presents results from the TULIP study, a Phase III trial comparing trastuzumab duocarmazine to physicians choice treatment in patients with pre-treated HER2-positive, locally advanced or metastatic breast cancer. In this trial, treatment with trastuzumab duocarmazine significantly improved progression-free survival in comparison to physians choice. This interview took place at the European Society for Medical Oncology (ESMO) 2021 congress.