[Paroxysmal hemicrania. Post-stenotic dilatation of the subclavian artery].

A 50 year-old women presented with a history of increasingly frequent bouts of cervicofacial pain over the last 18 months, and a pulsatile tumor in the supraclavicular region. Angiography showed a stenosis of the left subclavian artery with post-stenotic dilatation related to a cervical rib. No further pain was experienced after removal of the rib. The probable rate of the autonomic nervous system in the physiopathology of this painful syndrome is discussed.