1　临床资料　患者 ,男 6 9岁。 10ａ前出现多饮、多食、多尿、消瘦、乏力。在其系统医院查血糖 12 4ｍｍｏｌ Ｌ ,尿糖( ) ,确诊为Ⅱ型糖尿病。此后经控制饮食、服用降糖药物等治疗 ,效果不显。 2月前出现双足趾刺痛、麻木 ,间歇性跛行 ,双足趾及右足底皮肤变黑 ,不能行走 , 1 clinical data patients, male 6 9 years old. 10a before drinking, eating more, more urine, weight loss, fatigue. In its system of hospital blood glucose 12 4mmol L, urine (), diagnosed with type II diabetes. Since then controlled diet, taking drugs such as hypoglycemic treatment, the effect is not significant. Two months ago there are two-toed toe sting, numbness, intermittent claudication, double toe and right foot skin dark, can not walk,