Among the nine patients who had calcinosis cutis, seven patients (anti‐NT5C1A antibody seropositive (n = 4) and anti‐NT5C1A antibody seronegative (n = 3)) were tested for anti‐NXP2 antibody and anti‐SAE antibody through myositis panel test. This evidence concerns the gene NT5C1A and myositis disease.