HIV-1 primary skin disorders. A) Patient with seborrheic dermatitis showing a papulosquamous disorder patterned on the sebum-rich areas of the scalp and face. B) Representative section (H&E 20x) shows focal parakeratosis, moderarte acanthosis, spongiosis related to hair follicles and scarce neutrophils. C) Patient with atopic dermatitis with lesions ranging from weeping crusted areas to lichenified plaques. D) Representative section (H&E 20x) shows acanthosis, mild spongiosis, and dermal infiltrate composed of lymphocytes, monocytes and few eosinophils. E) Patient with psoriasis, characterized by symmetric raised inflamed lesions covered with a silvery white scale in both lower limbs. F) Representative section (H&E 10x) shows hyperkeratosis, parakeratosis, acanthosis, spongiosis, absence of granulosum layer and neutrophil infiltrates (Munro's microabscess). G) Patient with eosinophilic folliculitis featured by follicular pustular papules on the upper part of the chest. H) Representative section (H&E 20x) shows perifollicular and perivascular infiltrate with eosinophils.