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Definition of Loeys-Dietz syndrome
Medically reviewed by Min Clinic Staff | Updated: January 2026
Loeys-Dietz syndrome: An inherited syndrome characterized by aortic aneurysms and other blood vessel abnormalities in children. The condition is often associated with other birth defects. The aortic aneurysms of Loeys-Dietz syndrome are prone to rupture at a smaller size than other aneurysms, with early identification of the condition and surgical intervention critical for survival.