Fig. 1

Multimodal CT evaluation of MKS (Case 1). 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. G–I Posttracheostomy CT images revealing an inadequate cuff seal with air leakage, measured at the residual tracheal lumen.Abbreviations: MKS: Mounier–Kuhn syndrome; MIP, Maximum Intensity Projection; CT, computed tomography