1病例资料患者,女,18岁,因“左下肢乏力、跛行半年,疼痛10d”入院。患者半年前无明显诱因出现左下肢乏力、跛行,伴左髋关节活动轻度受限,无疼痛。10余天前出现左大腿近端疼痛,行走10 min需休息,休息后可缓解。查体:左侧跛行步态,左大腿近端前外侧稍肿胀,皮肤无发红、破溃。左股骨大转子附近压痛,局部皮温正常,未能触及明显包块。左 1 case data patient, female, 18 years old, due to “left lower limb fatigue, limp six months, pain 10d ” admission. No obvious incentive to patients six months ago, left leg weakness, claudication, mild left-hip joint activity limited, no pain. More than 10 days before the emergence of proximal left thigh pain, walking 10 min need to rest, rest can be alleviated. Physical examination: left limp gait, left thigh proximal lateral swelling slightly, the skin without redness, rupture. Left femur near the greater trochanter tenderness, local skin temperature was normal, failed to reach the obvious mass. left