Squamous Cell Papilloma


Squamous cell papillomas are located in the nasal vestibule and are formed by keratinising stratified squamous epithelium of the skin surface [122]. They are exophytic and consist of a thickened layer of differentiated squa-mous epithelium, without evidence of atypia or mitoses, which is supported by arborescent stalks of fibrovascu-lar stroma. Varying degrees of keratinisation are present and either hyperkeratosis, parakeratosis or both may be seen. They are benign, rarely recur after simple excision. Its main differential diagnosis is the exophytic schneide-rian papilloma.

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