A 21-year-old female student with a 3-month history of mild psoriasis (erythematosquamous plaque on the elbows and nail pitting on the nails of the hand) was referred to our Department. One month earlier, suddenly appearance of erythematous, smooth, clearly demarcated plaques was observed on the labia majora, the mons pubis, the perineal and perianal region together with a brownish hyperkera-totic papule on the pubic region (Figure 1, a-b). The patient underwent excisional biopsy at the Department of Surgery, and the pathohistological finding was unavailable to us. The elbows were treated with corticosteroid-keratolytic preparation, whereas the anogenital lesions were treated with moderately potent topical corticosteroids. In addition to anogeni-tal erythema, on clinical examination we noticed an erythematosquamous plaque on the site of excision with a hyperkeratotic verrucous papule on the edge of the lesion (the Koebner phenomenon on the site of skin injury). In the pubic region, we noticed two hyperkeratotic papules and a few verrucous papules on labia majora. Localized dermatophyte or candida infection were excluded with a KOH test and scrapings culture. Serology for syphilis, HIV, and hepatitis were negative. Cervical Pap smear was normal. Biop-sy of erythematosus lesion from the mons pubis was conclusive for psoriasis, and of the keratotic papule with the genital wart with positive HPV 6 and 11. The patient’s older sister had chronic plaque psoriasis