PMC5554959_01
Chest CT showed a 6mm polypoid lesion at the right lateral aspect of the proximal trachea.
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CT scan. CT results showed mild centrilobular emphysema and a 6-mm polypoid lesion in the right wall of the proximal trachea (Fig. 1).
White light videobronchoscopy revealed a polypoid lesion with withish pink mucosa.
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Flexible bronchoscopy revealed a polypoid lesion with a pink mucosa and firm consistency in the right lateral wall of the proximal trachea (Fig. 2).
a) Scanning photograph of sagittal section of polyp showing a long stalk and marked papillary or finger-like projections of nodule (H & E stain, x 2). Low-power and high-power photomicrographs shows that polyp consists of fibrovascular stroma with scattered lymphocytes, plasma cells and erythrocytes and lined by normal respiratory epithelium with ciliated pseudostratified columnar epithelia and stratified squamous epithelia (H & E stain, x 40, Fig. 3a; x20, Fig. 3b; x 10 Fig. 3c).
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The nodules consisted of fibrovascular stroma with scattered lymphocytes, plasma cells, and erythrocytes, and lined by normal epithelium with ciliated pseudostratified columnar epithelia and stratified squamous epithelia. (Fig. 3a-d) Complementary analyses using protein C, which is reactive for human papillomavirus (HPV) 6 and 11, were negative.