Márcio Debiasi, MD., Ph.D., is a medical oncologist specializing in breast cancer at the Champalimaud Foundation's Breast Unit in Lisbon, Portugal. In this role, he is actively involved in both clinical care and research, with a focus on advancing treatments for aggressive forms of breast cancer.

Dr. Debiasi has contributed to several significant studies, including the KeyPARTNER trial, which aims to optimize the use of chemotherapy in combination with immunotherapy for treating triple-negative breast cancer—a particularly aggressive subtype. His research interests encompass breast cancer management, immunotherapy, and medical oncology.
Prior to his current position, Dr. Debiasi served as a Senior Global Medical Affairs Leader at a pharmaceutical company from 2019 to 2021. He has authored multiple peer-reviewed publications and collaborates with international experts in oncology.