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Hematoxylin and eosin (HE) staining of tumors in the nasal septum (A), middle turbinate (B), nasopharynx (C), oropharynx (D), and aryepiglottic fold (E). The nasal septum and middle nasal turbinate tumors showed inverted papilloma, whereas the others presented squamous epithelial papilloma. All images are at 100× magnification. The scale bar for each image represents 250 μm.
