Professor Mary O’Brien is a consultant medical oncologist at the Royal Marsden Hospital in London treating patients with thoracic malignancies.

She is also Professor or Practice in Medical Oncology at the Imperial College London.

Professor O’Brien has a long history of clinical trials in all aspects of lung cancer diagnosis and treatment and lectures widely, has many mentees and students and over 250 peer reviewed publications.

She has recently edited the 1st and now the 2nd edition of ‘Fast Fact in Non Small cell lung cancer’ – a book for all health care professionals.

She conceived and has been principal investigator for the Keynote 091/Pearls trial – a positive trial of adjuvant immunotherapy – on behalf of the international investigators, ETOP and EORTC and now presents it and have written the manuscript.

Professor O’Brien was awarded a life time achievement award in Jan 2022 by the British Thoracic Oncology Group.