UCN2 and polymyositis: The negative results of screening of our patient for these antibodies represent an additional argument against a diagnosis of autoimmune polymyositis, although anti-Jo-1 antibodies are found in 18% to 55% of these patients, anti-Mi-2 antibodies are found in 4% to 9%, anti-SRP antibodies are found in 4.8% to 11% of patients with autoimmune polymyositis, and anti-PM-Scl antibodies are found in 25% of patients with concomitant polymyositis and scleroderma [8-10].