title: A 67-year-old man with painful diplopia: question.
authors.forename: Anthony
authors.initials: A
authors.lastname: Fok
authors.forename: Catriona A
authors.initials: CA
authors.lastname: McLean
authors.forename: Ronil V
authors.initials: RV
authors.lastname: Chandra
authors.forename: Udaya
authors.initials: U
authors.lastname: Seneviratne
mesh_terms: D000368:Aged; D001921:Brain / Q000473:pathology; D003937:Diagnosis, Differential; D004172:Diplopia / Q000209:etiology / Q000473:pathology*; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D010146:Pain / Q000209:etiology / Q000473:pathology*; D012507:Sarcoidosis / Q000150:complications / Q000175:diagnosis* / Q000473:pathology*