purpura hemorrhagica nodularis

例句：

1. 1.The patient had a purpura hemorrhagica on her left leg that required immediate medical attention.
   患者左腿上有一个紫癜，需要立即医疗关注。
2. 2.The doctor diagnosed the patient with purpura hemorrhagica and prescribed medication to help reduce inflammation.
   医生诊断患者患有紫癜并开了药来帮助减轻炎症。
3. 3. In some cases, purpura hemorrhagica can be caused by an autoimmune disorder, which requires specialized treatment.
   在一些情况下，紫癜可能是自身免疫疾病引起的，需要进行专门的治疗。