We studied six patients with SUNCT, a unilateral headache syndrome with shortlasting attacks and ipsilateral autonomic phenomena with orbital phlebography and MRI. All but one orbital phlebogram showed abnormalities on the headache side (in one patient bilaterally), involving the superior ophthalmic vein or/and the cavernous sinus. No systematic changes were demonstrated on MRI. The phlebography findings were similar to those observed in the Tolosa-Hunt syndrome and in cluster headache.
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