Vertebral Artery Compression by the Greater Cornu of the Thyroid Cartilage.

A case of symptomatic unilateral vertebral artery compression by the greater cornu of the thyroid cartilage is described. Imaging shows ossification of the greater cornu of the thyroid cartilage with compression of an aberrant vertebral artery that enters the transverse foramen at the level of C4. Diagnostic workup and surgical treatment are described. Laryngoplasty with a transverse cervical approach and resection of the greater cornu of the thyroid cartilage resulted in resolution of symptoms.