An MAA, anti-Ro-52, is associated with ILD in children with JDM [63]; children positive for ILD also have increased levels of neopterin [16] which should prompt the use of high-resolution computerized tomography (CT) or ultrasound—to scan the lungs—as well as pulmonary function testing, if over the age of 6. The gene discussed is TRIM21; the disease is interstitial lung disease.