Ultrastructure of the bronchial epithelium in children with cystic fibrosis.

The ultrastructure of the bronchial epithelium in 3 children with cystic fibrosis 
was described. In 2 of them a developed squamous metaplasia with 
many signs of pathological alteration of the epithelial cells was observed. 
In the third patient severely injured pseudostratified epithelium with remnants of 
ciliary border is preserved. 