<unk>  is a disease of the airways where cartilage in the bronchi is defective. This leads to collapse of the airways and bronchiectasis.<unk>  is deficiency of the bronchial cartilage distally.
Williams-Campbell syndrome
Williams syndrome
Foster Kennedy syndrome
Loken Senior syndrome
Avellis syndrome
Tome-Brune-Fardeau syndrome
Jervell and Lange-Nielsen syndrome
Cowden syndrome