1　病　例女 ,37岁 ,头痛、恶心、呕吐 2小时 ,于 2 0 0 0年 11月下午 3∶0 0入院。病人患特发性血小板减少性紫癜 (ＩＴＰ) 5年 ,口服强地松维持治疗 ,2个月前停药。 2天前病人左足扭伤 ,来院发现双下肢、上腹部皮肤有紫癜、瘀斑 ,未作特殊处理回家 ,2小时后 ,病人突然头痛、 A female patient, 37 years old, had a headache, nausea and vomiting for 2 hours and was admitted at 3:03 in November 2000. Patient suffering from idiopathic thrombocytopenic purpura (ITP) for 5 years, oral prednisone maintenance treatment, withdrawal 2 months ago. 2 days before the patient left foot sprained, to the hospital found that both lower extremities, upper abdominal skin purpura, ecchymosis, without special treatment home, 2 hours later, the patient suddenly headache,