Sloane P D, Tardell R
Am Fam Physician. 1986 Apr;33(4):197-200.
Palpable purpura is a clinical finding that represents antigen-antibody deposition along small cutaneous vessels, resulting in extravasation of blood cells into the interstitium. The most common cause of palpable purpura is leukocytoclastic vasculitis, a disease involving cutaneous postcapillary venules. Although often idiopathic, leukocytoclastic vasculitis has been associated with numerous infections, drugs, rheumatic diseases and malignancies.
可触及性紫癜是一种临床体征，表现为抗原抗体沿皮肤小血管沉积，导致血细胞渗入间质。可触及性紫癜最常见的病因是白细胞破碎性血管炎，这是一种累及皮肤毛细血管后小静脉的疾病。虽然白细胞破碎性血管炎通常为特发性，但它与多种感染、药物、风湿性疾病及恶性肿瘤有关。
