Stuart J. Schnitt, M.D. is the Chief of Breast Oncologic Pathology for the Dana-Farber Brigham Cancer Center, Associate Director of the Dana-Farber Cancer Institute/Brigham and Women’s Hospital Breast Oncology Program, co-leader of the Dana-Farber Harvard Cancer Center Breast Program, Senior Pathologist at Brigham and Women’s Hospital, a Professor of Pathology at Harvard Medical School and an internationally recognized expert in breast pathology. Dr. Schnitt did his internship and residency in Anatomic and Clinical Pathology at Beth Israel Hospital in Boston followed by a fellowship in surgical pathology, also at Beth Israel Hospital. He was a faculty member in the Beth Israel Hospital/Beth Israel Deaconess Medical Center Department of Pathology from 1984-2017, including 11 years as Director of Anatomic Pathology and subsequently Vice Chair for Anatomic Pathology. He has published over 340 original articles, review articles, editorials, commentaries, and book chapters, primarily in the area of breast diseases. He has authored a popular breast pathology textbook entitled “Biopsy Interpretation of the Breast”, now its third edition. The first two editions of this book were also published in Chinese. In addition, he is one of the editors of the 4th Edition of the “World Health Organization Classification of Tumours of the Breast”, published in 2012. Dr. Schnitt is a Past President of the United States and Canadian Academy of Pathology (2010-2011). Other notable honors include the Arthur Purdy Stout Society of Surgical Pathologists Annual Prize (1999), the Albany Medical College Distinguished Alumnus award (2014), the Lynn Sage Distinguished Lecturer (2014) and the Maude Abbot Lecture at the United States and Canadian Academy of Pathology Annual Meeting (2016). He is particularly proud to have been involved in the training of 35 breast pathology fellows since 1995. He has lectured extensively around the world. His research interests and contributions to our understanding of benign breast diseases and breast cancer have been broad, but have largely focused on risk factors for local recurrence in patients with invasive breast cancer and ductal carcinoma in situ treated with breast conserving therapy, benign breast disease and breast cancer risk, and stromal-epithelial interactions in breast tumor progression.