HPI: This 17 yo boy has had 2 - 3 mm papules on chest, abdomen and neck slowly progressive since age 10. Occasionally the lesions become iflamed.
OE: Scores of 2 - 3 mm somewhat cystic lesions in above areas. Some are slightly greyish
Within the dermis there is a cyst lined by squamous epithelium with a granular layer and containing laminated keratin and numerous vellus hairs.