This study investigated the association between AAA and the thoracic aneurysm genes ACTA2, COL3A1, EFEMP2, FBN1, MYH11, MYLK, SMAD3, TGBF2, TGFBR1, TGFBR2, and MTHFR (p.Ala222Val). Here, MTHFR is linked to triple-A syndrome.