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Sigurdis Haraldsdottir, MD, PhD

Medical Oncology

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  • Physician

Clinical Interests

  • DNA damage repair mutations
  • Lynch syndrome
  • Microsatellite unstable tumors

Contact Information

  • Office Phone Number617-582-7777
  • Fax617-582-8807


Dr. Sigurdis Haraldsdottir, MD, PhD, received her medical degree and master's degree in medical sciences from the University of Iceland. She did her Internal Medicine training at Boston University Medical Center and training in Medical Oncology at the Ohio State University, before serving on faculty at Stanford University 2015-2019. Her clinical and research focus is in cancer genetics and gastrointestinal malignancies with a focus on mismatch repair deficient cancers, particularly colorectal cancer. She has conducted population-based research on Lynch syndrome - an inherited cancer syndrome - and recently completed a nation-wide study on Lynch syndrome in Iceland. She received her Ph.D. in Medical Sciences in 2017 from the University of Iceland. Her interests also focus on investigating colorectal cancer genomics, and their effect on outcomes and treatment implications.

Board Certification:

  • Internal Medicine, 2011
  • Medical Oncology, 2014


  • Ohio State University


  • Boston University Medical Center

Medical School:

  • University of Iceland


Dana-Farber Cancer Institute
450 Brookline Avenue
Boston, MA 02215
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