This series, sponsored by the European Association of Neurosurgical Societies, has already become a classic. In general, one volume is published per year. The Advances section presents fields of neurosurgery and related areas in which important recent progress has been made. The Technical Standards section features detailed descript of standard procedures to assist young neurosurgeons in their post-graduate training. The contributions are written by experienced clinicians and are reviewed by all members of the Editorial Board.

Advances: Endoneurosurgery: Endoscopic Intracranial Surgery (H. B. Griffith) ? Evoked Potential Monitoring in Neurosurgical Practice (L. Symon, F. Momma, K. Schwerdtfeger, P. Bentivoglio, I. E. Costa e Silva, A. Wang) ? The Biological Role of Hypothalamic Hypophysiotropic Neuropeptides (K. von Werder)Technical Standards: Sphenoidal Ridge Meningioma (D. Fohanno, A. Bitar) ? Congenital Spinal Cord Tumors in Children (H. J. Hoffman, R. W. Griebel, E. B. Hendrick) ? Controversial Views of Editorial Board on the Intraoperative Management of Ruptured Saccular Aneurysms