Livedoid vasculitis - リベド血管炎https://ja.wikipedia.org/wiki/リベド血管炎
リベド血管炎 (Livedoid vasculitis) は、主に若年から中年の女性に見られる慢性皮膚疾患です。その特徴を説明するために使用される頭字語の 1 つは、「下肢の網状パターンを伴う痛みを伴う紫斑性潰瘍」(PURPLE) です。慢性静脈高血圧症や静脈瘤など、多くの病気と関連しています。

  • 痛みを伴うこともあります。
    References Livedoid vasculopathy: A review with focus on terminology and pathogenesis 36285834 
    NIH
    Livedoid vasculopathy は、下肢に再発し続ける痛みを伴う潰瘍を特徴とするまれな皮膚疾患です。
    Livedoid vasculopathy (LV) is a rare thrombotic vasculopathy of the dermis characterized by painful, relapsing ulcers over the lower extremities. Diagnosis is challenging due to the overlap in clinical appearance and nomenclature with other skin disorders. Treatment selection is complicated by poor understanding of the pathogenesis of LV and lack of robust clinical trials evaluating therapy efficacy. The terminology and pathophysiology of LV are reviewed here, along with its epidemiology, clinical and histologic features, and treatment options. A diagnostic pathway is suggested to guide providers in evaluating for comorbidities, referring to appropriate specialists, and choosing from the available classes of therapy.
     Livedoid vasculopathy: A review of pathogenesis and principles of management 27297279
    Livedoid vasculopathy は、下肢に再発性の潰瘍を引き起こし、白萎縮として知られる淡い傷跡を残すまれな皮膚疾患です。正確な原因はまだ不明ですが、血液凝固の増加 (hypercoagulability) が主な要因であり、炎症は二次的な役割を果たしていると考えられています。凝固に寄与する要因には次のようなものがあります - deficiencies in proteins C and S, genetic mutations like factor V Leiden, antithrombin III deficiency, prothrombin gene mutations, high levels of homocysteine 。生検では、この状態では血管内の血栓、血管壁の肥厚、瘢痕化が見られます。治療には、抗血小板薬、抗凝血薬、線溶療法などの薬物療法による血栓の予防に重点を置いた多角的なアプローチが必要です。この皮膚の状態にはさまざまな薬が使用できます - colchicine and hydroxychloroquine, vasodilators, immunosuppressants 。
    Livedoid vasculopathy is a rare skin condition that causes recurring ulcers on the lower legs, leaving behind pale scars known as atrophie blanche. While the exact cause is still unclear, it's believed that increased blood clotting (hypercoagulability) is the main factor, with inflammation playing a secondary role. Factors contributing to clotting include as follows - deficiencies in proteins C and S, genetic mutations like factor V Leiden, antithrombin III deficiency, prothrombin gene mutations, high levels of homocysteine. In biopsies, the condition shows blood clots inside vessels, thickening of vessel walls, and scarring. Treatment involves a multi-pronged approach focusing on preventing blood clots with medications like anti-platelet drugs, blood thinners, and fibrinolytic therapy. Various drugs can be used for this skin condition - colchicine and hydroxychloroquine, vasodilators, immunosuppressants.
     Livedoid Vasculopathy 32644463 
    NIH
    Livedoid vasculopathy は、両脚に病変が発生する稀な症状です。小さな血管内での血栓の形成は、血管内層の損傷に加えて、凝固の増加と血栓の分解の減少によって引き起こされると考えられています。女性、特に 15 ~ 50 歳の女性によく見られます。禁煙、傷の手当て、抗凝血薬や抗血小板薬などの薬剤の使用が効果的です。
    Livedoid vasculopathy is a rare vasculopathy that is typically characterized by bilateral lower limb lesions. Increased thrombotic activity and decreased fibrinolytic activity along with endothelial damage are believed to be the cause of thrombus formation in the capillary vasculature. It is 3 times more common in females than in males, especially in patients between the ages of 15 to 50 years. There is no definite first-line treatment, but general measures like smoking cessation, wound care, and pharmacological measures like anticoagulants and antiplatelets have shown good results.