Livedo reticularis - 网状青斑
网状青斑 (Livedo reticularis) 是一种常见的皮肤表现，由斑驳的网状血管图案组成，表现为皮肤的花边状紫色变色。受冷可能会加重这种情况，最常发生在下肢。变色是由于供应皮肤毛细血管的小动脉血流量减少引起的，导致脱氧血液呈现蓝色变色。这可能是由高脂血症、微血管血液学或贫血状态、营养缺乏、高免疫性疾病和自身免疫性疾病以及药物/毒素引起的。
严重肾下主动脉狭窄所致的病变。
References
Livedo reticularis (LR) 是一种皮肤状况，其特征是暂时或持久、斑驳、红蓝色到紫色的网状图案。它主要影响中年女性，通常无症状。另一方面， livedo racemosa (LRC) 是一种更严重的形式，通常与抗磷脂抗体综合征有关。
Livedo reticularis (LR) is a cutaneous physical sign characterized by transient or persistent, blotchy, reddish-blue to purple, net-like cyanotic pattern. LR is a benign disorder affecting mainly middle-aged females, whereas livedo racemosa (LRC) is pathologic, commonly associated with antiphospholipid antibody syndrome.
Livedo reticularis (LR) is a cutaneous physical sign characterized by transient or persistent, blotchy, reddish-blue to purple, net-like cyanotic pattern. LR is a benign disorder affecting mainly middle-aged females, whereas livedo racemosa (LRC) is pathologic, commonly associated with antiphospholipid antibody syndrome.
