26-years old female with cystic fibrosis and NTMLD (cavitary form). Evolution of chest CT changes from 2018 (a–c) to 2020 (d–f). (a–c) Chest CT scans (lung window, axial and coronal view) demonstrating bronchiectasis of the large and smaller airways (black arrows), centrilobular nodules (white arrows) and bronchial wall thickening predominating in the upper lobes. (d–f) Chest CT images (lung window, axial and coronal view) demonstrate progression of changes—bronchiectasis has worsened, inflammatory changes became larger, thick wall cavities have appeared (black arrows) which can indicate pulmonary infection caused by NTM.