Fibroepithelial sinonasal polyp
The patient had the left nasal polyp/lesion biopsied.
MICROSCOPIC DESCRIPTION: Sections show non keratinizing stratified squamous mucosa with underlying stroma. There is mild spongiosis, scattered intraepithelial neutrophils and reactive atypia. The stroma contains a mixed acute and chronic inflammatory cell infiltrate. There is no evidence of dysplasia or malignancy. A PAS stain is negative for fungal micro-organisms.
FINAL DIAGNOSIS: Fibroepithelial polyp with acute inflammation.