Thoracoabdominal aortic aneurysm in Cogan's syndrome

Cogan's syndrome is an autoimmune disease of unknown etiology, clinically m anifested as non-syphilitic interstitial keratitis and audiovestibular symp toms. Increasing evidence suggests that Cogan's may be a systemic vasculiti s. In this report, we review the vascular manifestations of Cogan's syndrom e and report two cases of thoracoabdominal aortic aneurysm in patients with this disorder.