A<unk>  is a keratinized structure found in regions where abnormal squamous cells form concentric layers. Also called an epithelial<unk> , due to a location among squamous cells of the epithelium, this type of structure is sometimes seen with squamous cell carcinoma.
Keratin pearl
Pseudopolyps
Hyperkeratinization
Sebaceous hyperplasia
Subepidermal calcified nodule
Clear cell acanthoma
Keratin implantation cyst
Lobulation