MRI angiography of a patient before and during alcohol-induced cluster headache.

A 25-year-old man, subject to bouts of left supraorbital cluster headache on an annual basis over the previous 8 years, volunteered for MRI angiography during an active period. Studies were conducted before and during a typical cluster headache attack induced by alcohol. MRI angiography failed to show dilatation of the ophthalmic artery on either the symptomatic side, or the non-symptomatic side during headache, nor was there observed any dilatation of the anterior cerebral arteries on either side.