Professor Karol Sikora is Chief Medical Officer of Proton Partners International. He was the founder of Cancer Partners UK which has created UK’s largest independent UK cancer network with private equity. He was Professor and Chairman of the Department of Cancer Medicine at Imperial College School of Medicine and is still honorary Consultant Oncologist at Hammersmith Hospital,London.  He was seconded to be Director of the WHO Cancer Programme in 2000.


Known as the Positive Professor, Professor Karol Sikora has stormed Twitter reaching over 250k followers after only two months of joining. With a messaging aim to avoid the fear created by relentless negative news and misunderstanding, he seeks positive realism and clarity with relatable advice across the wider medical landscape, mental health and his specific area of expertise Cancer care.


He’s hugely respected positive voice that has become a Twitter phenomenon and appeared on This Morning, Sky News, Good Morning Britain, LBC News and Talk Radio. Sikora also has a column in the Daily Express.


He is Dean and Professor of Medicine at Britain’s first independent Medical School at the University of Buckingham and a Fellow of Corpus Christi College, Cambridge. He has published over 300 papers and written or edited 20 books including Treatment of Cancer – the standard British postgraduate textbook, now going to its seventh edition. His new book The street-wise patients guide to surviving cancer has just been published.