患儿 ,女 ,10月。因全身皮肤瘀斑伴发热、咳嗽、腹泻 15ｄ入院。无惊厥、鼻衄、便血等症。平素常患腹泻及呼吸道感染 ,磺胺为家中常用药。母乳喂养 ,未添加任何辅食。父母健康 ,家族中无出血性疾病史。查体 :营养差 ,神萎烦躁 ,皮肤无黄染 ,散在瘀斑块 ,颈软 ,心肺无异常 ,肝右 Children, women, October. Due to systemic skin ecchymosis with fever, cough, diarrhea 15d admission. No convulsions, epistaxis, hematochezia embolism. Often often suffering from diarrhea and respiratory tract infections, sulfonamides commonly used drugs at home. Breastfeeding, did not add any complementary food. Parents healthy, no history of hemorrhagic disease in the family. Physical examination: poor nutrition, atrophy, irritation, yellow skin, scattered in the ecchymosis, neck soft, no abnormal heart and lung, right liver