PMC7155231_01
Left blue arrows indicate the lesions and right the convex probe endobronchial ultrasound indicates the depth of the lesions and surrounding vessels. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
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Fig. 1.
Hematoxylin/Eosin x 40, Among the bronchial mucus producing epithelium, revealed a exophytic polyloid structure of multilayerd squamous epithelium.
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Fig. 2, Fig. 3, Fig. 4, Fig. 5.
Hematoxylin/Eosin x 400, In the acanthotic layer there were numerous cells with small, sringed nucleus sorrounden by perinuclear halo and evidence of coilocytic atypia.
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Fig. 2, Fig. 3, Fig. 4, Fig. 5.
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Left lesion in the trachea, right lesion in the left main stem bronchus.
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Fig. 6.
Hematoxylin/Eosin x 200, This is a polypoid villoglandular bronchial structure, composed of long columnar respiratory type cells. There is no cytoplasmic or nuclear atypia but prominent microvilli.
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Fig. 7, Fig. 8.
From left to right; STORZ rigid bronchoscope with 12mm outer rim and 11mm inner rim, argon plasma coagulation system (APC), cryotherapy system, YAG-laser system.
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Fig. 9, Fig. 10.