The new edition of this book updates an established text written for trainees and practicing trainers in Endovascular Neurosurgery and Interventional Neuroradiology. The content is based on the curriculum of the MSc course in Endovascular Neurosurgery at Oxford University and its tutorial system of teaching. The tutorial is a learning episode focused on a particular subject, which introduces and guides the student through background literature, highlights relevant research data, and provides insights from an experienced practitioner on treatment. The book is presented as a series of chapters (tutorials), with each covering a different topic to provide a complete review of the subspecialty and its theoretical basis. It is intended to equip the reader with a foundation of knowledge on which to build their clinical practice and a reference base for further study. Its practical approach to foundation knowledge will help the reader to understand developments in this rapidly expanding field of medicine.