【单选题】【消耗次数：1】
下列关于正常阑尾的CT表现，错误的是（）
①
阑尾直径小于6mm
②
阑尾壁厚度不大于2mm
③
阑尾腔内可以见少量气体
④
阑尾腔内的高密度就是粪石
⑤
阑尾可以表现位结节状或细线状
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关于阑尾炎的CT征象的说法错误的是（）
①
阑尾直径大于6mm可确诊阑尾炎
②
直径6-9mm之间，如果间断含气或对比剂，可以是正常阑尾
③
阑尾炎最有力证据是阑尾周围渗出
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急性阑尾炎可并发髂窝及腹膜后脓肿
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化脓性阑尾炎，行阑尾切除术
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单纯性阑尾炎，行阑尾切除术
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术中发现阑尾周围脓肿，必须切除阑尾
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