患儿女,9岁,因“皮疹1个月,右侧肢体无力3 h”于2006年10月20日入院。入院前1个月无诱因出现双下肢反复红色皮疹,伴瘙痒,有少许渗液,未治疗。入院前12 d出现发热,家长见左侧腹股沟处1个1 cm×1 cm 包块伴肿痛,在当地医院抗感染治疗1周后热退,左侧腹股沟处肿痛缓解。但患儿左侧下肢肿胀逐渐明显,于入院前4 d 在当地医院住院,查血常规:白细胞15×10~9/L～12×10~9/L,中性分类0.80,血红蛋白83g/L,血小板50×10~9/L～70×10~9/L,D-二聚体增高,两次 B 超声提示左下肢深静脉血栓形成,腹部未见异常。急诊生化及凝血四项正常,单纯疱疹病毒 IgM 及 Children, 9 years old, because of “rash 1 month, right limb weakness 3 h ” was admitted on October 20, 2006. One month before admission, there was no incentive to appear double lower extremity repeated red rash, with itching, a little exudate, untreated. Fever occurred 12 d before admission. Parents showed a 1 cm × 1 cm mass with swelling and pain in the groin at the left side. After a week of anti-infective treatment in a local hospital, the patient returned to heat and the swelling of the left groin was relieved. However, the left lower extremity swelling in children was gradually obvious, and was admitted to the local hospital 4 days before admission. Blood routine tests were as follows: leukocyte 15 × 10-9 / L ~ 12 × 10-9 / L, neutral classification 0.80, hemoglobin 83g / L , Platelets 50 × 10 ~ 9 / L ~ 70 × 10 ~ 9 / L, D-dimer increased, twice B ultrasound prompted deep left venous thrombosis, abdomen no abnormalities. Emergency biochemistry and coagulation of four normal, herpes simplex virus IgM and