In the past few years nucleic acids technologies have grown into a powerful analytical and also increasingly therapeutic tool. It has been applied not only to the uncovering of gene functions in many organisms, but also to pathogenetic analysis and recently also for the treatment of human diseases. The book discusses in depth the potential of these innovative methods in the broad field of central nervous system and brain tumours particularly. Whereas there is currently no comprehensive overview on potential and challenges of nucleic acids technologies for basic brain tumours and for the clinical management of patients with brain tumours, this book does explicitly cover the many other aspects of the "RNA World" (pathogenic and therapeutic potential of microRNAs, aptamer technology, etc.), too. With this significantly broadened scope as compared to currently existing books it appears to be an urgently needed new publication.