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BioDr. Mengni Guo is a medical oncologist in the Division of Oncology at Stanford University School of Medicine and a member of the Stanford Breast Cancer Program. She specializes in the care of patients with breast cancer, from active treatment through long-term survivorship. Dr. Guo emphasizes an individualized, team-based approach, working closely with patients and multidisciplinary specialists to develop treatment plans that reflect each patient’s clinical needs, personal values, and long-term quality of life.

Dr. Guo’s research focuses on breast cancer survivorship, particularly metabolic health during and after cancer treatment and the prevention and management of long-term treatment effects. She also uses large real-world datasets to study breast cancer treatment patterns and outcomes and to identify strategies to improve long-term health after cancer therapy. Her research has been presented at national meetings, including the American Society of Clinical Oncology (ASCO) Annual Meeting.