Dr. Mariana Chavez MacGregor is a medical oncologist with a clinical practice dedicated to the care of patients with breast cancer. After finishing medical school at the Universidad Nacional Autónoma de México, she obtained a Master in Sciences degree in Clinical Epidemiology at the Netherlands Institute of Health and Sciences. She completed her Clinical Residency in Internal Medicine at Barnes-Jewish Hospital/Washington University School of Medicine followed by a Clinical Fellowship in Medical Oncology at The University of Texas MD Anderson Cancer Center. She is an Associate Professor at The University of MD Anderson Cancer Center, holding a primary appointment in the Health Services Research Department, and a joint appointment in the Breast Medical Oncology Department. In addition of being an active and compassionate clinician, Dr. Chavez MacGregor is committed to an academic a career. She has received a number of awards including the SWOG Young investigator award and the Multinational Association of Supportive Care in Cancer (MASCC) Young Investigator of the Year award. She received the Achievement in Clinical Research Award and was recently honored with the MD Anderson Faculty Scholar Award. She holds leadership positions within ASCO, currently serving as the past-chair of the Clinical Practice Guidelines Committee. Dr. Chavez MacGregor research focuses on breast cancer outcomes and disparities research. She has extensive experience evaluating patterns of care, toxicities and complications of cancer treatment. In addition, she has been involved in the planning, design and implementation of clinical trials and is an active member of SWOG. She has written more than 100 articles, review articles, invited commentaries, and book chapters on breast cancer.