Wiktionary
keratocyst
n. (context pathology English) An odontogenic cyst composed of keratinized squamous epithelial tissue
Wikipedia
Keratocyst
A keratocyst is a type of cutaneous cyst. They appear similar to epidermoid cysts; however, are not limited to a specified location on the body. Keratocyst are most often reported in persons with nevoid basal cell carcinoma syndrome.