Coarctation of the aorta associated with aneurysm of the left subclavian artery.

Coarctation of the thoracic aorta is not often diagnosed after childhood. The combination of subclavian artery aneurysm in association with coarctation of the aorta is even less frequent. A review of the literature elicited only seven previously reported cases of such an association. Presented herein is a case of a young adult with coarctation of the aorta and secondary left subclavian artery aneurysm, diagnosed incidentally. We discuss the incidence of these rare conditions and possible causes for their co-existence.