Although exome or whole genome sequencing performed in 19 patients did not detect any protein-altering variants in both NT5C1A and NT5C1B genes[44], the genes encoding for the cN1A protein and a functionally related protein, respectively, are still important genetic candidates for understanding the relationship between sIBM autoimmunity and myofiber degeneration, and worth further genetic investigation. The gene discussed is NT5C1A; the disease is Autoimmunity.