What Do I Do Now? Patients with neuroimmunological syndromes pose many clinical challenges for the attending physician. Even experienced clinicians occasionally arrive at the point where diagnostic, work-up, treatment, or prognostic thinking becomes blocked. Neuroimmunology is a practical and accessible guide for both common and not-so-common neuroimmunological syndromes. Comprised of a collection of thirty short case vignettes, the information is presented in an easily digestible format that consists of a discussion highlighting the topic in questionas well as an answer and advice section. These discussions are followed by a brief "take home" message emphasizing the clinical, diagnostic, and therapeutic pearls of the case. Neuroimmunology is the go-to resource for primary care physicians, neurologists and subspecialists who encounter centraland peripheral demyelinating diseases, vasculitis, and other immune system related neurological disorders.