Hone your clinical reasoning and diagnostic skills with a new series of case-based topic-specific studies. This compilation of 20 neurology-related cases includes presenting clinical manifestations and a discussion of the broad range of possible diagnoses, with a reveal of the actual diagnosis at the end. Case highlights include ataxia, cerebellar tumor, heavy metal poisoning, rare genetic disorders, Guillain-Bare syndrome, vitamin deficiency, periodic paralyses, autoimmune disorder, myasthenia gravis, autoimmune encephalitis, and neurological dysfunction due to cancer in another organ.