Squamous papillomas are composed of finger-like or frond-like projections of squamous mucosa, containing thin fibrovascular cores. Secondary or tertiary branching of papillae may be present. Keratosis is minimal. Frequently, parabasal cell hyperplasia, usually extending up to the mid-portion with a perpendicular orientation of the cells to the basement membrane, is seen. Mitotic features may be prominent within this area. Koilocytosis is occasionally evident {2066}. Premature and abnormal keratinizing individual cells (dyskeratosis) if present, contributes to a disorganized appearance. Premalignant changes are not commonly observed, and should be reported when present {1253}.

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10 Ways To Fight Off Cancer

10 Ways To Fight Off Cancer

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