FBN1 and Schnyder corneal dystrophy: However, the scarce studies of SCD do not use current criteria of Marfan syndrome [9], [10], they do not document presence of causative FBN1 mutations [9]–[12], and they do not investigate the role of different types of FBN1 mutations on the risk of ventricular arrhythmia and SCD [9]–[12].