Abstract
目的 探讨儿童臀肌挛缩症的CT表现.方法对61例经CT诊断为臀肌挛缩症,并经手术病理证实的患儿进行研究,并与20例正常臀肌的CT表现作对照.结果在61例臀肌挛缩症中,57例(93.4%)是双侧挛缩,4例(6.6%)是单侧;CT主要表现:(1)臀肌体积缩小,118侧(100.0%)臀大肌体积缩小,16侧(13.6%)臀中肌体积缩小;12侧(10.2%)梨状肌体积缩小;4侧(3.4%)臀小肌体积缩小;4侧(3.4%)髋关节后方关节囊挛缩.(2)注射点区臀肌钙化、坏死.95侧(80.5%)臀肌有钙化,24侧(20.3%)臀肌有斑片状坏死.(3)条索状挛缩带,81条位于臀大肌外侧,从臀大肌外上缘到髂筋束,36条位于臀大肌骶骨侧.(4)肌间隙增宽,轻度38侧(32.2%),中度 53侧(44.9%),重度27侧(22.9%).结论 CT扫描能正确诊断臀肌挛缩症,明确病变范围及程度,对术前评估有重要价值。
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