Since the first edition of this book, the impressive development of neuroendoscopy has dramatically changed the surgical approach to hydrocephalus, the main pathology pediatric neurosurgeons worldwide have to deal with. This revised and updated second edition, written by worldwide leaders in the field, fully reflects this progress: not only existing chapters have been  reviewed whenever required, but new ones have been added   thus taking into consideration every aspect of hydrocephalus, even when associated with the rarest pathologies. The general part include now more data on history, biomechanics, circulation and molecular basis. Special consideration for fetal surgery has been added, whereas the section on neonatal hydrocephalus has been further developed. Section 4, on the different pathologies associated with hydrocephalus, has been significantly expanded. and is now amazingly detailed, as well as the section on shunt treatment.