Actinic keratosis

Actinic keratosis (AK) is a pre-cancerous skin disease. It is considered a pre-cancerous disease because, for some patients, the disease will change over time into a type of skin cancer called squamous cell carcinoma. It is made up of abnormal keratinocytes in a layer of the skin called the epidermis. What causes actinic keratosis? Actinic …
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