NEW YORK (Reuters Health)—Immunotherapy appears to yield neurological improvements in some patients with autoimmune cerebellar ataxia, especially those with nonparaneoplastic disorders, researchers report. “I was surprised that so many patients responded to immunotherapy (steroids, intravenous immunoglobulin (IVIg), and plasma exchange) and remained ambulatory,” Dr. Andrew McKeon from Mayo Clinic in Rochester, Minn., told Reuters Health…