Other sarcomeric mutations, such as those in troponin proteins, are linked to varied phenotypes—TNNI3 (troponin I) mutations are associated with altered cardiac shape but low SCD risk, while TNNT2 (troponin T) mutations carry a high SCD risk despite mild hypertrophy [5,14,24,27]. This evidence concerns the gene TNNI3 and Schnyder corneal dystrophy.