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Spontaneous regression of acquired melanocytic nevus without peripheral halo
( So Young Jung ) , ( Hanyeong Wang ) , ( Wonkyung Lee ) , ( June Eun Seol ) , ( Hyojin Kim )
프로그램북 67권 1호 342-342(1pages)
UCI I410-ECN-0102-2015-500-002013669
이 자료는 4페이지 이하의 자료입니다.

Halo nevus is a pigmented nevus surrounded by depigmented patch clinically and it can be seen aroundacquired or congenital melanocytic nevus, blue nevus, Spitz nevus, dysplastic nevus or melanoma. Rarely halo nevus without halo can occur. In that case, nevus shows identical histologic features to those seen in halo nevus but without presenting a halo clinically. A 41 year-old male presented with hyperpigmented macule on the back. The lesion occurred and had been darkened since 6 months before. On physical examination, 1.5 X 1.5 cm sized hyperpigmented plaque was seen on the back, however, there was no depigmentation around the plaqueor other parts of body. Histopathologic findings of the lesion revealed dense lichenoid infiltration with nevoid cell nests in upper dermis, which was compatible with halo nevus. Halo nevus is related with spontaneous regression of the nevus that we decided to observe the lesion withoutany treatment. One year later, it disappeared without depigmentation. Herein, we report a case of histologically proven halo nevus without halo showing spontaneous regression.

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