Fig. 2

Multimodal CT evaluation of MKS (Case 4). A–C Axial, sagittal, and coronal views demonstrating pantracheobronchial dilation. D 3D airway reconstruction reveals main bronchial dilatation with pathognomonic features: multiple diverticula and cystic bronchiectasis. E, F Coronal oblique MIP images confirming bilateral mainstem bronchus dilation. Abbreviations: MKS: Mounier–Kuhn syndrome; MIP, maximum intensity projection; CT, computed tomography