Pigmented nail with atypical melanocytic hyperplasia |
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Authors: | KWANG HYUN CHO&dagger ,BANG SOON KIM&dagger ,SEUNG HO CHANG&dagger ,YOO SHIN LEE&dagger ,KWANG JOONG KIM |
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Affiliation: | Department of Dermatology, Seoul National University College of Medicine, Korea. |
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Abstract: | We report two cases showing black discoloration of the thumb nail which were histologically found to be acral lentiginous melanoma (ALM) in situ. A pigmented subungual lesion is more frequently malignant than benign and it is generally believed that diagnosis of subungual melanoma during the radial-growth phase is very difficult. Our cases are particularly interesting because atypical melanocytic hyperplasia was confined to the epidermis despite the lesion being present for a long time. |
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