A man in his late 20s presented with mildly itchy, erythematous plaques of 3 months’ duration on both legs. The lesions started to appear on the left pretibial region as small papules, which gradually increased in size and coalesced to form bigger plaques. No history of local trauma, prolonged standing, and occupational exposure to mineral dust or recent drug intake was recollected. He was not diabetic. On examination, large, ill-defined, erythematous plaques were present on the pretibial areas extending onto the lateral aspect of both legs. The plaques were surmounted by multiple, discrete atrophic scars. The periphery of the plaques showed increased vascularity in the form of telangiectasias and venous prominences, along with atrophy of the overlying skin (Figure, A). There were no lesions elsewhere on the body. A skin biopsy sample was obtained from the plaque and sent for histopathological examination (Figure, B and C).

一名20多岁的男子双腿出现持续3个月的轻度瘙痒，红斑。病变开始出现在左前庭区域，呈小丘疹，逐渐变大并合并形成更大的斑块。没有发现局部创伤，长时间站立，职业接触矿物粉尘或近期吸毒的历史。他不是糖尿病患者。经检查，在胫骨前缘区域延伸到双腿外侧的部位出现大的，模糊不清的红斑。斑块被多个离散的萎缩性瘢痕所覆盖。斑块的周围表现为以毛细血管扩张和静脉突出的形式增加的血管，以及上面的皮肤萎缩（图A）。身体其他部位没有病变。