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简介：AbstractIntroduction:Trichofolliculoma characterized clinically by the presence of acentral dilated pore with tufted hairs and corresponds histologically to a central primary follicle and many secondary vellus hair follicles originating from it. Thus far, dermoscopy description of trichofolliculoma has been lacking.Here, we describe a typical case of trichofolliculoma, particularly the special manifestation under the dermoscopy.Case presentation:A 29-year-old man complained a five-year history of a nodule containing a central whitish hair plug on his left tempus. Dermoscopic examination revealed a well-defined, yellow macule with a central whitish hair plug surrounded by dilated capillaries, and histopathological analysis was consistent with trichofolliculoma.Discussion:The findings of dermoscopy were also vary, which may be affected by the origin of the disease, various phases of the hair cycle, depth of the lesion, and even external stimulus.Conclusion:Diagnosis of trichofolliculoma is sometimes difficult because the presence of the central crater and visible hairs is low, and dermoscopy examination may be a potentially useful diagnostic tool.

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简介：目的探讨“DERMOSCOPY-Ⅱ皮肤镜图像诊断工作站”（简称“工作站”）对某些色素性皮肤肿瘤和白癜风的临床诊断价值。方法收集色素性皮肤肿瘤和白癜风患者共76例。首先，临床肉眼判断，后经“工作站”检查分析，最终组织病理验证，白癜风皮损经伍德氏灯检查验证，进行统计学处理和分析。结果经“工作站”诊断，符合73例，不符合3例，分别是表皮囊肿、色素性日光角化病和色素性鲍温氏病；其平均诊断符合率达96．05％，比临床肉眼判断提高了29．94％；色素性皮肤肿瘤良、恶性灵敏度93．75％、特异度95．45％。结论“工作站”对某些色素性皮肤肿瘤的良、恶性诊断和白癜风判断具有较好的辅助性和临床应用价值。