Claire Harrison

Professor of myeloproliferative neoplasms and clinical director


Claire Harrison became a consultant at Guy's and St Thomas' NHS Foundation Trust in 2001, where she is also now a clinical director.

She has influenced major advances in her field including the description of key mutations and designing/leading global clinical trials, for example the first JAK inhibitor trial in Europe. Claire is the chief investigator for several other international and national clinical trials.

Claire has strong international collaborations in France, Germany, Spain and the USA amongst others. She contributes to British Society of Haematology and the European Haematology Association.

She has worked with enthusiastic patients to create a patient charity MPNvoice, and also works with other patient charities such as Blood Cancer UK and MPN research foundation.

Claire is an international expert in her field.

Education and training

  • Oxford University
  • University College Hospital
  • Great Ormond Street

Research interests

  • Myeloproliferative neoplasms
  • Essential thrombocythaemia
  • Polycythaemia Vera
  • Myelofibrosis
  • Eosinophilia and nuetrophilia
  • MPN/MDS overlap
  • Clinical trials
  • Thrombosis and disease progression


  • NIHR clinical researcher achievement, 2017 and 2018
  • Dunhill Medical Fellowship



Claire has authored many papers in peer-reviewed journals such as the New England Journal of Medicine and Blood.

Last updated: January 2023

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