<unk>  (from kerat- + -osis) is a growth of keratin on the skin or on mucous membranes stemming from keratinocytes, the prominent cell type in the epidermis. More specifically, it can refer to: * actinic<unk>  (also known as solar<unk> , a premalignant condition * chronic scar<unk>  * hydrocarbon<unk>  *<unk>  pilaris (KP, also known as follicular<unk>  * seborrheic<unk> , not premalignant
Keratosis
Leukoplakia
Acrogeria
Median nail dystrophy
Onychauxis
Lamellar ichthyosis
Keratoderma
Dyskeratosis