Keratosis
| Keratosis | |
|---|---|
| Upper arm showing keratosis pilaris | |
| Specialty | Dermatology, medical genetics | 
Keratosis (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 keratosis (also known as solar keratosis), a premalignant condition
- chronic scar keratosis
- hydrocarbon keratosis
- keratosis pilaris (KP, also known as follicular keratosis)
- seborrheic keratosis, not premalignant