“…However, some surgeons have objections about this aggressive treatment because of the low rate of malignant transformations for small-to-medium divided nevi. 17 , 18 In consideration of the malignant transformation, unsettled cosmesis problems, and other pathological change after incomplete excision, 19 , 20 we insist that prophylactic complete surgical removal of the lesion is exceedingly important. In this study, the rapid change of the lesions in patients 1 and 5, the recurrent lesion in patient 2, and the postoperative pathologic examination of patients 1, 4, and 6 provide sufficient evidence for complete ablation.…”