Background. Seborrheic keratosis (SK) is a common benign epidermal tumor, affecting both men and women, especially those over 50 years of age, the incidence increases with age. The cause of SK is not yet known with certainty. However, many factors can cause SK. Lesions often appear in areas exposed to sunlight, exposure to sunlight is thought to have an important role in the incidence of SK. Ob…