Fig. 20
A 62-year-old man with acute respiratory failure. He referred Gottron papules and acral cutaneous ulcerations one month previously; laboratory exams revealed increased Creatine-Phosphokinase levels (800 u/l) and presence of Anti-melanoma differentiation-associated gene 5 (MDA5) antibodies. Diffuse ground-glass opacifications (white asterisks in A–C) and small consolidations (white arrows in A, C) are depicted, suggesting HRCT features of diffuse alveolar damage