Both studies reported 100% clearance within 10-24 days following the procedure. Determination of clearance in both studies was based on clinical criteria and, in cases deemed necessary by the supervising dermatologist, by histological criteria. Biopsies showed only slightly thinned epidermis and mild superficial fibroplagia of the papillary dermis.46,47 Recurrence rates varied between 0% at 84 months47 to 20% (one of five patients) at 5 months. (After retreatment by electrodesiccation and curettage, no recurrence was observed at

20 months.)46 The disparate recurrence rates may be related to differences in energy settings and in the width of clinically normal margins included in the treatment area. No impairment in digital function was noted in either study.

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