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. 2023 Aug 14;16:3447–3455. doi: 10.2147/IJGM.S418394

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© 2023 Liu et al.

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Histopathological findings of TO illustrateTracheal mucosa intact. (A) Nodular cartilaginous tissue with calcification; (B) Nodular cartilaginous tissue and mature bone tissue with calcification; (C) Squamous epithelial metaplasia of the tracheal mucosa and nodular mature cartilage and bone tissue were seen in the interstitium.