Resende Cristina, Araújo Catarina, Vieira Ana Paula, Brito Celeste
Department of Dermatology and Venereology, Hospital de Braga, Braga, Portugal.
BMJ Case Rep. 2013 May 30;2013:bcr2013009746. doi: 10.1136/bcr-2013-009746.
Dermal melanocytoses include a variety of congenital and acquired melanocytic lesions characterised by the presence of multiple spindle-shaped dendritic melanocytes in the dermis. These lesions are commonly found in the skin of Asians, but they can also appear in Caucasians. The Mongolian spot, nevi of Ota and Ito are the most common morphological forms. We report a case of a 24-year-old Caucasian woman presented with a 10-months history of progressive darkening of the right side of her upper back. Cutaneous examination revealed a macular blue-grey hyperpigmentation of the right side of her upper back. Biopsy specimen from the macule showed multiple darkly pigmented, spindle-shaped dendritic melanocytes in the superficial dermis, interstitially arranged between collagen bundles. The diagnosis of nevus of Ito was established. Our patient is maintaining vigilance in dermatology consultation.
皮肤黑素细胞增多症包括多种先天性和后天性黑素细胞病变，其特征是真皮内存在多个梭形树突状黑素细胞。这些病变常见于亚洲人的皮肤，但也可出现在白种人身上。蒙古斑、太田痣和伊藤痣是最常见的形态学类型。我们报告一例24岁白种女性病例，其右上部背部渐进性变黑已有10个月病史。皮肤检查发现其右上部背部有斑片状蓝灰色色素沉着。该斑片的活检标本显示，在浅表真皮中存在多个色素沉着深的梭形树突状黑素细胞，间隙性排列于胶原束之间。诊断为伊藤痣。我们的患者正在皮肤科会诊中保持警惕。
