title: Picture quiz: a young patient with a severe headache. Horners syndrome.
authors: Respiratory registrar, Salisbury district hospital, UK.
authors: V
authors: V
authors: Joshi
authors: D
authors: D
authors: Walters
mesh_terms: D000328:Adult; D002533:Cerebral Angiography / Q000379:methods*; D003937:Diagnosis, Differential; D005260:Female; D006261:Headache / Q000175:diagnosis / Q000209:etiology*; D006732:Horner Syndrome / Q000150:complications / Q000175:diagnosis*; D006801:Humans; D018810:Magnetic Resonance Angiography / Q000379:methods*