Dr Liam Welsh

Consultant Clinical Oncologist, Neuro-oncology Unit MA PhD MBBS MSc MRCP FRCR

Specialism: Neuro-oncology

Available at: Chelsea, Sutton

Special interests:

  • primary and secondary central nervous system tumours
  • chemotherapy and radiotherapy for central nervous system tumours
  • stereotactic radiotherapy and radiosurgery for brain tumours
  • functional brain imaging


Dr Liam Welsh is a Consultant Clinical Oncologist specialising in the treatment of adults with central nervous system tumours.

Dr Welsh read Natural Sciences at Cambridge University, specialising in Physics, and then stayed on at Cambridge to complete a PhD in Biophysics in 1997. Following a period of post-doctoral research in the Biochemistry Department in Cambridge, Dr Welsh attended medical school and graduated from the Guy’s, King’s and St. Thomas’ School of Medicine, University of London in 2004, and was proxime accessit to the University of London gold medal.

After completing general medical training in London, he trained in clinical oncology at The Royal Marsden NHS Foundation Trust and Guy’s and St. Thomas’ Hospitals. During his clinical oncology training Dr Welsh obtained an MSc in Oncology from The Institute of Cancer Research, London in 2012, graduating with distinction, and then undertook a two-year period of research in functional imaging in head and neck cancer, also at The Institute of Cancer Research. He gained the Fellowship of the Royal College of Radiologists (FRCR) in 2011, and completed specialist training in 2015.

Dr Welsh joined the Neuro-Oncology Unit of The Royal Marsden as a Consultant in Clinical Oncology in 2015. He is a member of the EORTC Brain Tumour Group, and is a co-investigator in a number of national and international trials in neuro-oncology. He has a special interest in stereotactic radiosurgery for brain metastases, and other intra-cranial tumours.

Clinical units