UCL Queen Square Institute of Neurology


Benign and Malignant Tumours Speaker Profiles

Dr Jeremy Rees, PhD FRCP

Dr Jeremy Rees

Dr Jeremy Rees qualified in 1988 from University College and Middlesex Medical School with distinctions in Medicine, Surgery and Therapeutics. After postgraduate training, including a spell at Memorial Sloan Kettering Hospital, New York, in 1999 he was appointed as Honorary Senior Lecturer in Neuro-oncology and Consultant Neurologist at the National Hospital for Neurology and Neurosurgery. He specializes in the management of low-grade brain tumours and neurological complications of cancer.

Having been the Clinical Lead for the Brain Tumour Unit at UCLH and the Pathway Director for Brain Cancer at London Cancer, he is now a member of the NICE Guidelines Committee for writing national guidelines on the treatment of brain tumours. He leads a research team investigating the role of multimodality imaging in the management of Low Grade Gliomas, has edited a textbook on Neuro-oncology, written numerous peer-reviewed research papers and chapters on Neuro-oncology and lectures extensively to different professional groups.

Dr Hani Marcus

Mr Hani Marcus is a Consultant Neurosurgeon at the National Hospital for Neurology and Neurosurgery and Honorary Associate Professor at the UCL Queen Square Institute of Neurology.

He specialises in treating patients with pituitary adenoma, and related skull base tumours. His expertise lies in the use of “keyhole” endoscopic approaches, completing fellowships in Calgary, Zurich, and London before his appointment. In 2020, he cofounded the British Neuroendoscopy Society to drive the advancement of endoscopic techniques and led the largest prospective study of patients undergoing pituitary surgery worldwide, including 866 patients across 30 centres in the United Kingdom and Ireland. He has also authored international guidelines on pituitary surgery through the Pituitary Society, where he serves on the education committee.

Liam Welsh, PhD, FRCR
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 leading to the award of an MD(res) degree. 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

Michael Kosmin

Dr Michael Kosmin is a consultant clinical oncologist at University College London Hospital and the National Hospital for Neurology and Neurosurgery. He specialises in the use of radiotherapy and chemotherapy for the management of tumours of the central nervous system. He has a particular interest in advanced radiotherapy techniques including stereotactic radiotherapy and proton beam therapy.

Jon Martin

Jon is a consultant in palliative medicine and the clinical lead for the palliative care service, Central and North West London NHS Foundation Trust; he leads on the provision of palliative care at the National Hospital for Neurology & Neurosurgery, part of the University College Hospitals London NHS Foundation Trust.
His clinical interests include people with neurological and neuro-oncological disease, non-cancer respiratory disease, advance care planning and psycho-spiritual care. He has a long-standing interest in the interface between medical ethics and medical law and is a mindfulness-based meditation practitioner.

Yen-Ching Chan     

Dr Yen-Ching Chang has been a Consultant at University College London Hospital (UCLH) and Great Ormond Street Hospital for Children since 2005. Her areas of expertise are paediatric radiotherapy (brain tumours, haematological malignancies and technical radiotherapy) and late effects following treatment for childhood cancers. She is an active member of the Children’s Cancer and Leukaemia Radiotherapy Group. 
She has been the clinical lead of the UCLH proton project since its inception in 2007.