[Ultrastructural and radioautographic study of bronchial biopsy in pulmonary tuberculosis during endobronchial laser therapy].

Structural and metabolic changes were explored in 68 main bronchial mucosal biopsy specimens from 31 patients with fibrocavernous pulmonary tuberculosis. It was shown that He-Ne laser endobronchial therapy induced proliferative and metabolic processes (as judged from the level of DNA and RNA syntheses) in the damaged epithelium, which restored its structure and differentiation into celiary and goblet cells with normal ultrastructure having undergone a number of transitional forms. The proliferative and metabolic activity of endotheliocytes and stromal cells increased in the intrinsic layer of the mucosa, which was accomplished by formation of soft fiber connective tissue.