Linear verrucous epidermal nevus (also known as a "Linear epidermal nevus," and "Verrucous epidermal nevus"[1]) is a skin lesion characterized by a verrucous skin-colored, dirty-gray or brown papule.[2]:771[3]:633 Generally, multiple papules present simultaneously, and coalesce to form a serpiginous plaque.[3]:633 When this nevus covers a diffuse or extensive portion of the body's surface area, it may be referred to as a systematized epidermal nevus, when it involved only one-half of the body it is called a nevus unius lateris.[2]:771