Department of Dermatology, Celal Bayar University, Manisa, Turkey.
Australas J Dermatol. 2009 Nov;50(4):301-2. doi: 10.1111/j.1440-0960.2009.00566.x.
A 61-year-old woman was referred to our dermoscopy unit for a pigmented lesion that had been present on her left arm for 8 years. The patient did not notice any enlargement or change in colour. On dermoscopy, homogeneous blue pigmentation was seen. The lesion was excised with the pre-operative diagnosis of melanoma, blue naevus and dermatofibroma. Histopathological examination showed a trichilemmal cyst in the mid-dermis. Although homogeneous blue pigmentation on dermoscopy is the hallmark of blue naevus, it may be seen in metastatic melanoma and exceptionally in hemosiderotic and cellular types of dermatofibroma. Trichilemmal cyst should be borne in mind also in the dermoscopic differential diagnosis.
一位 61 岁女性因左臂上存在 8 年的色素性皮损而被转诊至我们的皮肤镜检查单位。患者未注意到皮损有任何增大或变色。皮肤镜下可见均匀蓝色素沉着。术前诊断为黑色素瘤、蓝色痣和皮肤纤维瘤，病变被切除。组织病理学检查显示真皮中部有一个毛鞘囊肿。虽然皮肤镜下均匀蓝色素沉着是蓝色痣的特征性表现，但也可见于转移性黑色素瘤，极少数情况下也可见于含铁血黄素性和细胞性皮肤纤维瘤。在皮肤镜鉴别诊断中也应考虑毛鞘囊肿。
