Dr Peter Osin

Consultant Histopathologist FRCPath DM

Specialism: Breast, Pathology

Available at: Chelsea

Special interests:

  • breast pathology
  • general cytopathology
  • head, neck and thyroid cytopathology


Dr Peter Osin is a Consultant Histopathologist/Cytopathologist with a special interest and expertise in breast pathology. He qualified from Novosibirsk Hospital Medical School, Russia, with Diploma Cum Laude in 1989. His postgraduate training in histopathology was based at the Institute of Pathology, University of Jerusalem; St George’s Hospital, London; and University College Hospital, London.

Dr Osin is a Fellow of the Royal College of Pathologists, and was awarded the Gilbert Fellowship in 1997 and The Breakthrough Cancer Research Fellowship in 1999. Dr Osin has a Doctor of Medicine degree from the University of London (2001).

Dr Osin was appointed Consultant Histopathologist at The Royal Marsden in 2001 as a specialist Breast Histopathologist/Cytopathologist. His areas of clinical expertise and research interest are early breast cancer, familial breast cancer and the molecular pathology of breast cancer.

Dr Osin has experience in translational aspects of national and international breast cancer trials involving The Royal Marsden and The Institute of Cancer research (HERA trial, IMPACT, ISLAND, etc). He has over 30 publications in peer-reviewed journals including

The Lancet, Oncogene, Cancer Research, Journal of Pathology, International Journal of Cancer, Cytopathology and British Journal of Cancer, and has made numerous presentations at international scientific meetings.

Clinical units