Dysplastic nevus associated with seborrheic keratosis
A 38-year-old woman presented a dark coloured papule at physical examination measuring 9\nmm on the upper right back (). Dermoscopy\nrevealed asymmetrical shape, comedo-like openings, milia-like cysts, bluish veil, and\ngranulation (). Date of lesion appearance\nwas not known. The following hypotheses were formulated: Seborrheic keratosis, lichen\nplanus-like keratosis, melanoma, and atypical nevus. Exeresis with a 2mm margin was\nindicated and histological study revealed hyperkeratosis, horny pseudocysts, basaloid\ncells, presence of fusion of nests along the sides of rete ridges, concentric\nfibroplasia, atypical melanocytes, melanophages and discrete perivascular lymphocytic\ninfiltrate. From this description the conclusion was seborrheic keratosis associated\nwith dysplastic nevus ( e ).