Livedo reticularis - 網狀青斑
網狀青斑 (Livedo reticularis) 是一種常見的皮膚表現，由斑駁的網狀血管圖案組成，表現為皮膚的花邊狀紫色變色。受冷可能會加重這種情況，最常發生在下肢。變色是由於供應皮膚毛細血管的小動脈血流量減少引起的，導致脫氧血液呈現藍色變色。這可能是由高血脂、微血管血液學或貧血狀態、營養缺乏、高免疫性疾病和自體免疫疾病以及藥物/毒素引起的。
嚴重腎下主動脈狹窄所致的病變。
References
Livedo reticularis (LR) 是一種皮膚狀況，其特徵是暫時或持久、斑駁、紅藍色到紫色的網狀圖案。它主要影響中年女性，通常無症狀。另一方面， livedo racemosa (LRC) 是一種更嚴重的形式，通常與抗磷脂抗體症候群有關。
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.
