<unk>  (WCS) is a disease of the airways where cartilage in the bronchi is defective. It is a form of congenital cystic bronchiectasis. This leads to collapse of the airways and bronchiectasis. It acts as one of the differential to allergic bronchopulmonary aspergillosis. WCS is a deficiency of the bronchial cartilage distally.
Williams–Campbell syndrome
Keppen–Lubinsky syndrome
Avellis syndrome
DeSanto-Shinawi syndrome
Hecht Scott syndrome
Williams syndrome
Pelger–Huët anomaly
Shprintzen–Goldberg syndrome