DPYSL5 and Parkinson disease: Patients with a positive CRMP-5 antibody may have other symptoms, including dementia, seizures, anosmia, ageusia, dysphagia, limb weakness, Parkinsonism, myoclonus, chorea, hemiballismus, dyskinesia, akathisia, ataxia, early satiety, constipation/diarrhea, dry mouth, nausea, and weight loss [5].