CD8A and lichen sclerosus et atrophicus: A histopathological study by Harvell et al. examined the CD4/CD8 ratio in various dermatoses (psoriasis, spongiotic dermatitis, PLEVA, lichen planus, lichen sclerosus, herpetic dermatitis, erythema annulare centrifugum, urticaria, normal skin) [36].