ICD-11 definition : Lichen sclerosus is a chronic inflammatory dermatosis of unknown aetiology. It affects
both women and men of all ages. It is characterized by the development of white, smooth,
atrophic plaques on vulval and perianal skin in females and on the prepuce and glans
penis in males. It often results in scar formation leading to a narrow introitus or
phimosis with impairment of urinary and sexual function. The risk of anogenital squamous
cell carcinoma is slightly increased. Less commonly other sites of the skin are affected,
either independently or in conjunction with anogenital involvement.;
Lichen sclerosus is a chronic inflammatory dermatosis of unknown aetiology. It affects
both women and men of all ages. It is characterized by the development of white, smooth,
atrophic plaques on vulval and perianal skin in females and on the prepuce and glans
penis in males. It often results in scar formation leading to a narrow introitus or
phimosis with impairment of urinary and sexual function. The risk of anogenital squamous
cell carcinoma is slightly increased. Less commonly other sites of the skin are affected,
either independently or in conjunction with anogenital involvement.