NovelSMAD3Mutation in a Patient with Hypoplastic Left Heart Syndrome with Significant Aortic Aneurysm

摘要

Aneurysms-osteoarthritis syndrome (AOS) caused by haploinsufficiency ofSMAD3is a recently described cause of syndromic familial thoracic aortic aneurysm and dissection (TAAD). We identified a novelSMAD3mutation in a patient with hypoplastic left heart syndrome (HLHS) who developed progressive aortic aneurysm requiring surgical replacement of the neoaortic root, ascending aorta, and proximal aortic arch. Family screening for the mutation revealed that his father, who has vascular and skeletal features of AOS, and his brother, who is asymptomatic, also have the pathogenic mutation. This is the first case report of aSMAD3mutation in a patient with hypoplastic left heart syndrome. This case highlights the importance of genetic testing for known causes of aneurysm in patients with congenital heart disease who develop aneurysmal disease as it may significantly impact the management of those patients and their family members.