Lichen Sclerosus

Lichen sclerosus is a chronic skin condition that mainly affects the genital and anal areas. It causes thin, white patches of skin that can be itchy and uncomfortable. The affected skin may become fragile and tear easily, leading to pain and sometimes bleeding. This condition primarily involves the skin and mucous membranes, impacting daily activities and quality of life. It is more common in women but can affect men and children as well. The exact cause is unknown, but it is thought to involve an autoimmune reaction. Without treatment, it can lead to scarring and changes in the skin's appearance.

Lichen sclerosus is a chronic inflammatory dermatosis characterized by epidermal atrophy, dermal sclerosis, and a band-like lymphocytic infiltrate. It predominantly affects the anogenital region but can involve extragenital sites. The pathogenesis is believed to be autoimmune, with associations to other autoimmune diseases and presence of autoantibodies. Clinically, it presents with white, atrophic plaques, often accompanied by pruritus, pain, and dyspareunia. Histopathology shows hyperkeratosis, epidermal thinning, basal cell degeneration, and homogenization of collagen in the upper dermis. The condition is significant due to its potential for scarring, architectural distortion, and a small risk of progression to squamous cell carcinoma.