Carotid artery aneurysm as the initial presentation of Behçet's disease: A case report.

Behçet's disease is a rare systemic vasculitis that may involve arteries and veins. Carotid artery aneurysms are extremely uncommon and can be the initial manifestation. We report a 48-year-old man presenting with a painless pulsatile cervical mass. Imaging revealed a right common carotid artery aneurysm, surgically resected with a reversed saphenous vein graft. Histopathology suggested vasculitis, and subsequent evaluation confirmed Behçet's disease. This case highlights the importance of considering Behçet's disease in isolated arterial aneurysms and the need for combined surgical and immunosuppressive therapy.