Diagnosis of RPILD in patients with anti MDA5 antibodies. *Combined therapy with glucocorticoids and calcineurin antagonists is recommended specially if some risk factors are present (>60 years old, hyperferritinemia >500 nm/mL, C reactive protein > 1 mg/dl). HRCT, High Resolution CT Scan. PFT, Pulmonary Function Tests. RP-ILD, Rapidly Progressive Interstitial Lung Disease. GGO, Ground Glass Opacity.