Keywords: LS, Lichen sclerosus; VAAD, vulvar acanthosis with altered differentiation; acitretin; dVIN, Differentiated vulvar intraepithelial neoplasm; lichen sclerosus; vLS, vulvar lichen sclerosus; vSCC, vulvar squamous cell carcinoma; vulvar lichen sclerosus; vulvar squamous cell carcinoma.