报道２例儿童自发性下肢动脉血栓形成病例．病例病例１，女孩，６．５岁．多次突发严重右足疼痛３周。疼痛持续２０～３０分钟，同时局部温度明显下降．患儿无其他疾病史、外伤史以及家族史．入院体检唯一的体征是右足后胫部和足背无脉搏搏动，且温度降低。右下肢超声波示动脉 Two cases of spontaneous lower extremity arterial thrombosis in children were reported. Case 1, girl, 6.5 years old. Multiple sudden severe right foot pain for 3 weeks. Pain lasting 20 to 30 minutes, while local temperature decreased significantly. Children with no other disease history, history of trauma and family history. The only physical signs of admission were pulse-free pulsation of the shins and dorsalis of the right foot, and decreased temperature. Right lower extremity ultrasound showed artery