ABRCC: The Academic Breast Cancer Consortium


About Us


Peter Kabos M.D.
Director of ABRCC

Dr. Peter Kabos is Assistant Professor, Division of Medical Oncology at University of Colorado Cancer Center. Dr. Kabos joined the UCD faculty in July 2009 and was a member of the breast oncology program there. He spent four years as a post-doctoral research fellow at Cedars-Sinai Medical Center studying the biology of normal and cancer stem cells in gliomas. He completed his Internal Medicine residency training at USC Keck School of Medicine in Los Angeles and a fellowship in Hematology/Oncology at the University of Colorado Denver. He received his MD from Comenius University, Slovakia.

His research focus is in translating preclinical findings into novel treatments for patients with breast cancer. The Kabos Lab at the university focuses on the role of breast cancer stem cells and tumor microenvironment in treatment resistance.

His specialties and certifications include: Internal Medicine, Board Certification (2006); Internal Medicine - Medical Oncology, Board Certification (2009). His awards and honors include the ASCO Young Investigator Award and a Spore Seed Grant for Breast Cancer.


John S. Macdonald, M.D.
John S. Macdonald, M.D.
Senior Medical Advisor for the Oncology Consortia of Criterium

John S. Macdonald, MD, is Senior Medical Advisor for Criterium Inc. He served as Medical Director and Chief of Gastrointestinal Oncology at St. Vincent’s Comprehensive Cancer Center in New York City from 1998-2007. Dr Macdonald is Board certified in internal medicine and oncology. In addition to his responsibilities at the Saint Vincent’s Cancer Center from 1998 to 2007, Dr. Macdonald served as Chief of Medical Oncology at St. Vincent's Hospital and Medical Center, and Professor of Medicine at the New York Medical College.

Dr. Macdonald was named as the first recipient of an endowed professorship, the Lynn Wood Neag Distinguished Professor of Gastrointestinal Oncology, in 1999. He is recognized as a leading educator in Medical Oncology and has received numerous forms of recognition for his skills in medical education including being honored as Outstanding Clinical Attending Physician by the Department of Medicine at Georgetown University in 1977 and serving as a member of the Medical Oncology Section of the American Board of Internal Medicine from 1987 to 1993. Dr Macdonald served as Chair of the Gastrointestinal Cancer Committee of the Southwest Oncology Group between 1985 and 2000.

A leader in his field and a specialist in gastrointestinal cancer, Dr. Macdonald has authored more than 400 articles, abstracts and book chapters and has been published in many medical journals, including The New England Journal of Medicine, Cancer; Recent Results in Cancer Research; Advances in Medical Oncology, Research, and Education; and Medscape Hematology-Oncology. In addition to his writing he has served as editor of multiple journals including Cancer Treatment Reports, Journal of Clinical Oncology, and the Manual of Oncologic Therapeutics. In 2007 he served as editor of Advances in the Management of gastric Cancer.

Dr. Macdonald is a member of numerous professional organizations including the American College of Physicians, American Association for Cancer Research and American Society of Clinical Oncology. He has made over 400 presentations both nationally and internationally.

Dr. Macdonald received his medical degree from Harvard Medical School. He then went on to complete an internship and residency in internal medicine at the Beth Israel Hospital in Boston, and was awarded a fellowship in oncology at the National Cancer Institute. He was awarded an American Cancer Society Junior Faculty Fellowship. Dr. Macdonald was named a Fellow of the American Collage of Physicians in 1979.

Dr. Macdonald has received numerous awards and distinctions including being named in the Best Doctors in America listing in Good Housekeeping’s “Best 300 Doctors in America.” He has been named one of New York Magazine’s “Best Doctors in New York” over a seven year period.