<unk>  (also termed<unk> , or siadochiectasis) is cystic dilation of the ducts of salivary glands. It may be caused by salivary duct strictures or stones (sialolithiasis). It can also rarely be congenital.
Sialectasis
Bronchomalacia
Malacia
Tracheobronchomalacia
Bronchiectasis
Tracheal tumor
Eosinophilic bronchitis
Reactive airway disease