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男性,40岁,不慎从约三米高处坠下,足部先着地,伤后膝部明显瘀肿,疼痛,功能障碍,无昏迷史,检查:见膝部外翻畸形,下肢干力消失,侧向试验阳性,抽屉试验阳性。最有可能的诊断是:A、胫腓骨骨折
B、髌骨骨折
C、胫骨髁骨折
D、股骨髁间骨折
E、跟骨骨折
下列哪项检查最有助于诊断:A、行足纵轴叩击
B、测量双下肢长度
C、膝关节镜检查
D、膝部X线照片
E、神经系统的检查
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