Abstract
This article describes migraine without aura since childhood in a patient with bilateral cervical ribs. In addition to usual migraine triggers, symptoms were triggered by neck extension and by arm abduction and external rotation; paresthesias and pain preceded migraine triggered by arm and neck movement. Suspected thoracic outlet syndrome was confirmed by high-resolution bilateral magnetic resonance imaging (MRI) and magnetic resonance angiography (MRA) of the brachial plexus. An unsuspected aberrant right subclavian artery was compressed within the scalene triangle. The aberrant subclavian artery splayed apart the recurrent laryngeal and vagus nerves, displaced the esophagus anteriorly, and effaced the right stellate ganglia and the C8-T1 nerve roots. Scarring and fibrosis of the left scalene triangle resulted in acute angulation of the neurovascular bundle and diminished blood flow in the subclavian artery and vein. A branch of the left sympathetic ganglia was displaced as it joined the C8-T1 nerve roots. Left scalenectomy and rib resection confirmed the MRI and MRA findings; the scalene triangle contents were decompressed, and migraine symptoms subsequently resolved.
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