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See subtypes below: Fungiforminvertedoncocytic

General
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Treatment
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Case reports
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Clinical images
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Squamous papilloma

Gross description
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Micro description
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Micro images
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Thickened nonkeratinizing squamous epithelium
overlying fibrovascular core

Carcinoma arising in papilloma


a/b - small cell carcinoma undermining epithelium of overlying papilloma
c/d - sinonasal undifferentiated carcinoma mixed with carcinoma in situ and dysplastic epithelium

Differential diagnosis
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Additional references
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Fungiform

General
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Treatment
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Gross description
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Micro description
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Micro images
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Exophytic growth without surface keratinization, scattered goblet cells

Differential diagnosis
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Inverted

General
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Treatment
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Gross description
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Gross images
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Inverted papilloma

Micro description
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With focal verrucoid hyperplasia:

Micro images
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Endophytic growth with epithelial islands well demarcated from stroma

Glycogenated squamous cells, lined by thin and delicate basement membrane

Downward growth into preexisting mucosal glands

Differential diagnosis
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Oncocytic

General
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Treatment
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Gross description
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Micro description
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Micro images
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Oncocytic cells with intraepithelial mucin
filled cysts containing neutrophils

Differential diagnosis
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End of Nasal cavity > Other tumors > Papilloma



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