Aneurysm of the left subclavian artery: infrequent cause of upper pulmonary mass

Subclavian artery aneurysm is an uncommon condition. Usually is arteriosclerotic in origin. Its clinical features are scarce and generally are due to compression of the neighbourhood structures or ischemic, embolic or, less frequently, rupture of it. Diagnosis is performed by an arteriography or a computed tomography scan. Treatment includes the surgical reaction or the embolization. We report the case of a patient with a left subclavian artery aneurysm and review the most important clinical features of this entity.