“…Diagnosis is based on clinical background, symptoms, clinical signs, and the appearance of skin lesions in the genital area or elsewhere in the body [19, 23, 33, 34]. However, in cases where genital lesions are the only clinical finding, skin biopsy might be an option, showing the same classical histopathological characteristics of non-genital plaque psoriasis, such as Kogoj’s and Munro-Sabouraud’s collections of neutrophils, thickening of the Malpighian layer, hypogranulosis, hyperkeratosis, parakeratosis, and elongation of the papillae [3, 5, 16, 17, 35], but with the slight difference that this findings may be less evident in vulvar and penile psoriatic lesions [17, 29].…”