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1病历简介患者，男，2岁。左下肢较对侧明显细且发育短小2年。体检：左下肢较对侧明显变细，肌肉萎缩，小腿和足也较对侧明显短小。左膝关节不能全伸且有15°屈膝畸形并有10°外翻。左踝关节活动受限不能背伸。左下肢比对侧短缩8cm，左足20°外翻。患儿母亲在妊娠早期有先兆流
1 medical records patient, male, 2 years old. Left lower extremity was significantly thinner than the contralateral and the development of short 2 years. Physical examination: left lower extremity was significantly thinner than the contralateral, muscle atrophy, lower leg and foot than the contralateral was significantly shorter. The left knee can not be fully extended and has 15 ° knee flexion and 10 ° valgus. Left ankle joint activity can not dorsiflexion. Contralateral left lower limb shortened 8cm, left foot 20 ° valgus. Children with mothers have threatened in early pregnancy