Acquired melanocytic nevi due to topical immunosuppression.

Abstract

Case report. A 12-year-old boy with segmental vitiligo of the right lower limb dating from 2 years practiced topical corticosteroids with clobetasol propionate 0.05% for 9 months, from October, 2010 to June, 2011. For the presence of striae distensae (Fig. 1, circled) clobetasol was suspended despite a moderate repigmentation and natural phototherapy with 4% khellin was started and continued till September 2011, when tacrolimus 0.03%, was applied till December, 2011. At follow up visit in December about fifteen acquired melanocytic nevi varying in size from 2 to 7 mm (Fig. 2, 3) were visible on the right leg, on normal or repigmented skin, whereas no one was visible on the left leg; the dermoscopic examination showed uneven pigmentation and peripheral streaks (Fig. 3, inset). The final diagnosis was acquired melanocytic nevi due to topical immunosuppression; all treatments were suspended and continuous monitoring was programmed.