Lichen planus (LP) is a chronic inflammatory and immune-mediated disease that affects the skin, nails, hair, and mucous membranes

Lichen sclerosus (LS) is a chronic, inflammatory skin disease of unknown cause, commonly appearing as whitish patches on the genitals

Lipodermatosclerosis is a form of lower extremity panniculitis, an inflammation of the layer of fat under the epidermis.