Arterial tortuosity syndrome (ATS) is a rare autosomal recessive connective tissue disorder chiefly characterized by elongation and tortuosity of the large and medium sized arteries and anomalies of the vascular elastic fibers, and a propensity for arterial and aortic aneurysm formation with vascular dissection, caused by mutations in SLC2A10 [1, 2]. The gene discussed is SLC2A10; the disease is Andersen-Tawil syndrome.