【摘要】 太田痣是一种良性的、色素增多性皮肤病，皮损好发于面部，一般表现为单侧褐色至蓝色斑片。虽然该病通常情况下是良性的，但可能合并其他色素增多性疾病甚至恶变为黑素瘤。我们报道一例3岁男孩在左脸出现蓝色斑片和分散分布的蓝色斑点，经过几次激光治疗后，眼眶周围的蓝色斑块颜色逐渐加深，组织病理检查发现真皮可见多数双极树突状细胞，胞浆内含有色素颗粒，组化结果为S100(+),SOX-10(+),Melan-A(+),P16(+),HMB-45(+),Ki-67 <5%。最后，诊断为太田痣合并蓝痣。因此，对于激光治疗效果不佳的太田痣，应怀疑可能同时存在其他疾病，需要进一步随访。更多还原

【Abstract】 A 3-year-old boy presented with bluish patch and scattered blue spots on the left side of his face.After several sessions of laser treatment,the azury patch in the periorbital area became even darker.Histopathology showed many bipolar,pigment-laden dendritic cells scattered in the papillary and upper reticular dermis.Immunohistochemically,these cells were positive for S100,SOX-10,melan-A,P16,and HMB-45.The positive rate of Ki-67 was less than 5%.Finally,the lesion was diagnosed with nevus of Ota concurrent with common blue nevus.Therefore,for cases of the nevus of Ota with poor response to laser treatment,the possible coexisting diseases should be suspected.更多还原