Chronic paroxysmal hemicrania: a disabling headache syndrome responding to indomethacin

A 57-year-old man experienced daily episodes of unilateral headache accompanied by homolateral partial Horner syndrome and rhinorrhea for more than 40 years. Treatment with indomethacin eliminated these headaches. The patient's illness is best classified as "chronic paroxysmal hemicrania" as described by Sjaastad and Dale.