Keratosis
（重定向自Keratose）
Keratosis (from keratinocyte, the prominent cell type in the epidermis, and -osis, abnormal) is a growth of keratin on the skin or on mucous membranes. More specifically, it can refer to:
Actinic keratoses are pre-malignant growths. Seborrheic keratoses are not pre-malignant.