Modern Pathology

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Schneiderian Papillomas and Nonsalivary Glandular Neoplasms of the Head and Neck

Leon Barnes

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FIGURE 1 - Unfortunately we are unable to provide accessible alternative text for this. If you require assistance to access this image, please contact help@nature.com or the author

FIGURE 1.

Fungiform papilloma. Note the exophytic growth, absence of surface keratinization, and presence of a few scattered intraepithelial mucous cells (clear cells).

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FIGURE 2.

Inverted papilloma removed intact via a lateral rhinotomy and medial maxillectomy. Papillary structures are opaque and will not transilluminate.

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FIGURE 3.

Inverted papilloma, low magnification. Note the endophytic growth and that the epithelial islands are well demarcated from the stroma.

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FIGURE 4.

Inverted papilloma composed of 'glycogenated' squamous cells. Basement membrane is thin and delicate.

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FIGURE 5.

Oncocytic Schneiderian papilloma. Observe the multilayered oncocytic epithelium and intraepithelial mucin-filled cysts and microabscesses.

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FIGURE 6.

Respiratory epithelial adenomatoid hamartoma frequently mistaken for an inverted papilloma. Lesion composed of numerous glands lined by ciliated respiratory epithelium.

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FIGURE 7.

Respiratory epithelial adenomatoid hamartoma. Note that each gland is surrounded by a thick, eosinophilic basement membrane. Compare with Figure 4.

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FIGURE 8.

Intestinal-type adenocarcinoma. Papillary tubular cylinder cell-I variant (papillary type).

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FIGURE 9.

Intestinal-type adenocarcinoma. Papillary tubular cylinder cell-II variant (colonic type).

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FIGURE 10.

Intestinal-type adenocarcinoma. Alveolar-goblet cell variant (mucinous type).

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FIGURE 11.

Papillary adenocarcinoma of the nasopharynx. The tumor is composed of both papillae and glands and arises from the mucosa of the nasopharynx.

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FIGURE 12.

Low-grade papillary adenocarcinoma of the middle ear. The glands contain colloid-like secretions.

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TABLE 1 - Distribution of Schneiderian Papillomas - Unfortunately we are unable to provide accessible alternative text for this. If you require assistance to access this image, please contact help@nature.com or the author

TABLE 1 - Distribution of Schneiderian Papillomas.

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