Lichen sclerosus

Lichen sclerosus (LS), and also known as lichen sclerosus et atrophicus (LSetA) [also termed, incorrectly, "Lichen sclerosIs et atrophicus"] is a disease of unknown cause that results in white patches on the skin, which may cause scarring on and around genital or sometimes other skin. There is a bimodal age distribution in the incidence of LS. It occurs in females with an average age of diagnosis of 7.6 years in girls and 60 years old in women. The average age of diagnosis in boys is 9–11 years old.