The epidermal nevus is due to an overproduction of the epidermis (the upper layer of the skin). Lesions are present in 50% of cases at birth or may develop during childhood and especially in the first years of life.
There are different types of epidermal nevus, which are distinguished by the type of epidermal cells involved. The skin in these nevi mainly consists of a type of cell called a keratinocyte. They may be flat or protruding. Their color can be dark or brown. Over time, the lesions become thicker and darker and look like a group that is colloquially called “moles”. The removal of epidermal nevus is done surgically or using co2 laser.