Professor Tiit Mathiesen was a neurosurgeon at the Karolinska Institute in Sweden prior to receiving his chair as professor at the University of Coenhagen in Denmark. He has a remarkable expertise in the care of patients with meningioma and skull base surgery. This, coupled with a significant contribution to meningioma research, enables him to provide a unique insight into their care and treatment. He has published over 200 articles and authored numerous book chapters in neurosurgery. He is the Chairman of the WFNS ethics committee and is editor-in-chief of the major European neurosurgery journal, Acta Neurochirurgica.