The book is intended for practicing oncologists, neurologists, neurosurgeons and radiation oncologists as well as internists who treated patients with cancer. Our attempt was to write a book that would assist oncologists in understanding neurologic problems and neurologists in understanding oncologic problems. The book is also intended for physicians training to specialize in any of the above areas. It includes a practical approach to the diagnosis and management of patients with neurologic disease who are with known to have cancer or in whom cancer is suspected.