Dr Simon O'Connor

Consultant Histopathologist MB BCh BAO FRCPathMB

Specialism: Haemato-oncology, Pathology

Available at: Chelsea, Sutton


Dr Simon O'Connor has both a private and an NHS practice at The Royal Marsden. He is a consultant histopathologist with a special interest in haematological malignancies and bone marrow pathology.

He qualified in University College Dublin and trained in pathology in Ireland, the UK and USA, going on to lead a regional haematopathology service based in Nottingham for 12 years prior to his appointment at The Royal Marsden in 2014.

He has a keen interest in improving the role pathology plays in the delivery of high quality health care and has worked towards service improvement nationally as National Lead for Histopathology on the National Laboratory Medicine Catalogue (NLMC, a standardised national pathology test formulary), as Royal College of Pathologists Coordinator for Patient Pathways (identifying areas where lab tests can be more effectively integrated into care pathways), and member of the RCPath Working Group on Cancer Services (responsible for national cancer guidelines and cancer reporting datasets).

At The Royal Marsden, he works as part of the Haematological Malignancy Diagnostic Service (HMDS). The HMDS is based in The Centre for Molecular Pathology and as well as serving The Royal Marsden provides a national and international referral service for cases of lymphoma and leukaemia. In addition, it helps progress the translation of new technologies into effective, validated and reproducible tests for day-to-day clinical diagnostics.

Clinical units