Traumatized recurrent melanocytic naevus with typical starburst pattern on dermoscopy.
نویسندگان
چکیده
A 47-year-old Japanese woman presented with a 3month history of a black spot on a brown nodule. She had noticed a small nodule on her right arm during childhood. She noticed a black spot at the centre of the lesion after scratching, and therefore visited our department for evaluation of the lesion. On physical examination, a 2-mm diameter black spot was observed in the centre of a 4-mm diameter soft nodule, which was relatively uniform in colour (Fig. 1). Dermoscopic examination revealed a typical starburst pattern (black diffuse pigmentation with regular radial streaks at the periphery) situated in the whitish pink scar-like area at the centre and surrounded by a thin light-brown pigment network at the periphery (Fig. 2). The lesion was surgically excised under local anaesthesia. Histopathological examination showed hyperkeratosis and marked proliferation of melanocytes with large amounts of melanin pigments in the epidermal basal layer. Some melanocytes showed mild atypia, but no mitotic figures were found. Abundant melanin granules were distributed up to the horny layer, which seemed to correspond to the dermoscopic feature of starburst pattern. In addition, there was infiltration of lympho cytes and melanophages in the upper dermis with mildtomoderate fibrosis, and nests of roundshaped naevus cells were observed in the mid-dermis (Fig. 3). Traumatized Recurrent Melanocytic Naevus with Typical Starburst Pattern on Dermoscopy
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ورودعنوان ژورنال:
- Acta dermato-venereologica
دوره 88 4 شماره
صفحات -
تاریخ انتشار 2008