Common | |
Venous | |
Arterial | |
Neuropathic | |
Uncommon | |
Physical | Thermal burns, cold injury, radiation, trauma, factitial |
Bites | Spider |
Infection | Bacterial, fungal, spirochete, protozoal |
Vasculopathies | Livedoid vasculopathy, Buerger's disease |
Hypercoagulable states (inherited and acquired) | Factor V Leiden, antiphospholipid antibody syndrome, protein C and S deficiency, anti-thrombin III deficiency, prothrombin G20210A mutation, hyperhomocysteinemia and methylenetetrahydrofolate reductase (MTHFR) polymorphism |
Vaso-occlusive disorders | Calciphylaxis, cholesterol emboli, type I cryoglobulinemia, cryofibrinogenemia, oxalosis |
Vasculitis (small and medium-sized vessel) | Henoch-Schönlein purpura, rheumatoid vasculitis, mixed cryoglobulinemia, polyarteritis nodosa, granulomatosis with polyangiitis, lupus erythematosus |
Pyoderma gangrenosum | |
Necrobiosis lipoidica | |
Panniculitis | Alpha-1-antitrypsin deficiency, pancreatic fat necrosis, erythema induratum (nodular vasculitis) |
Neoplastic conditions | Squamous cell carcinoma, basal cell carcinoma, cutaneous T and B cell lymphoma, Kaposi's sarcoma |
Systemic sclerosis | |
Hematologic disease | Hemoglobinopathies, thrombocytosis |
Drugs | Hydroxyurea, warfarin, heparin |
Metabolic | Calcinosis cutis, gout, prolidase deficiency, leukocyte adhesion deficiency, Werner syndrome |
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