The presence of malignancy was not associated with gender, TPOAbs, TgAbs, APCA, family history for thyroid autoimmunity or coexistence of other autoimmune diseases, but individuals with a malignant disease were older than those without (54.2 ± 15.4 versus 49.6 ± 14.4 years, p = 0.006). The gene discussed is CACNA1A; the disease is autoimmune disease.