先证者，女，９岁。３天前无明显诱因出现双侧鼻出血，在我院门诊行前后鼻孔油纱填塞后出血停止并收住院。该患儿自２岁起反复出现鼻出血，轻微外伤后皮下瘀斑及出血不止。每年鼻出血３～５次，曾４次因鼻出血不止而住院治疗。查体见面色苍白，血压１４／１８ｋＰａ（１ｋ... Proof, female, 9 years old. 3 days ago there was no obvious incentive for bilateral epistaxis, bleeding in front of nostril oil gauze in our hospital stopped and admitted to hospital. The children from the age of 2 repeated episodes of epistaxis, minor traumatic ecchymosis and bleeding more than. Epistaxis 3 to 5 times a year, had 4 times due to epistaxis and hospitalization. Physical examination see pale, blood pressure 14 / 18kPa (1k ...