title: A new headache syndrome? Headache resembling cluster headache (Horton's headache), with recurring bouts of homolateral retrobulbar neuritis, partial factor XII deficiency, bleeding tendency and a heterolateral convulsive episode.
mesh_terms: D000328:Adult; D001778:Blood Coagulation Disorders; D005174:Factor XII; D005260:Female; D006261:Headache / Q000175:diagnosis*; D006801:Humans; D009902:Optic Neuritis; D012640:Seizures; D013577:Syndrome; D014653:Vascular Headaches / Q000175:diagnosis*
chemical_list: D005174:Factor XII