Kazan medical journalKazan medical journal0368-48142587-9359Eco-Vector7698310.17816/kazmj76983Research ArticleOccupational pneumoconiosis (Labor Hygiene, 1924, No. 5)MiloslavskyV.info@eco-vector.com151019242088808802807202128072021Copyright © 2021, Miloslavsky V.2021<p>Despite the gross anatomical changes in pneumoconiosis (sometimes the lung can contain up to 24% silicic acid and be so hard that it does not lend itself to a knife), the latter occupy an insignificant place in the clinic of pulmonary diseases.</p>Kazan Medical archiveКазанский медицинский архив