title: Clinical Reasoning: A 28-year-old man with progressive gait disturbance and encephalopathy.
authors.affiliation: From the Department of Neurology, Hospital of the University of Pennsylvania (A.M.M.); and the University of Pennsylvania (A.P.), Philadelphia. allie.massaro@uphs.upenn.edu.
authors.forename: Allie M
authors.initials: AM
authors.lastname: Massaro
authors.affiliation: From the Department of Neurology, Hospital of the University of Pennsylvania (A.M.M.); and the University of Pennsylvania (A.P.), Philadelphia.
authors.forename: Amy
authors.initials: A
authors.lastname: Pruitt
mesh_terms: D000328:Adult; D001921:Brain / Q000473:pathology; D001927:Brain Diseases / Q000175:diagnosis* / Q000188:drug therapy / Q000473:pathology / Q000503:physiopathology; D003937:Diagnosis, Differential; D020234:Gait Ataxia / Q000175:diagnosis* / Q000188:drug therapy / Q000473:pathology / Q000503:physiopathology; D006801:Humans; D016403:Lymphoma, Large B-Cell, Diffuse / Q000175:diagnosis* / Q000188:drug therapy / Q000473:pathology; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male