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lunette ray ban CT扫描对&#

 
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PostPosted: Tue 12:17, 15 Mar 2011    Post subject: lunette ray ban CT扫描对&#

CT扫描对早期宫颈癌的诊断价值
。本组总分期正确率为69.6%(71/102例),高估分期15。7%(16/102例),低估分期7.8%(8/102例),未分期6.9%(7/102例)。其错误原因是缺乏组织对比,不能正确估计肿瘤大小,不能正确判断阴道受侵情况,与国外报道的情况相符。4.CT扫描对淋巴结的价值:宫颈癌的治疗及预后与宫颈癌的分期及淋巴结转移情况密切相关。虽然宫颈癌按FIGO分期淋巴结情况未包括在内,但术前判断淋巴结转移情况,是影像学检查的重要内容。腹盆腔淋巴结的影像检查方法有CT、MRI、B超等,每种方法均有其局限性,而最重要的问题是不能发现小转移淋巴结,以及不能区分肿大的淋巴结是否是转移淋巴结。CT显示区域淋巴结转移的正确率为65%~80%(>1cm标准)。淋巴结转移的发生率与肿瘤的大小密切相关,肿瘤<lcm,淋巴结转移发生率为1l%;肿瘤>4cm,淋巴结转移发生率为59%。Yu等¨指出,应将淋巴结大小(>1cm)作为确定良恶性的标准,根据淋巴结内密度改变不能区分良恶性,但若淋巴结内有中心坏死,则对确定良恶性有价值。本组102例中有11例淋巴结转移,[link widoczny dla zalogowanych],占10.8%。其宫颈病灶全部>1cm,病期≥Ib1期。11例中CT检出7例,占63.6%,淋巴结最大径≥1.5cm3例,≤1cm4例。转移的淋巴结呈圆形或椭圆形软组织结节,其中2例呈中心低密度、边缘厚壁环状强化,l例中心有坏死(图5、12)。我们认为这些表现是转移淋巴结的特征性表现,与国外文献报道一致。综上所述,我们认为,宫颈增大,[link widoczny dla zalogowanych],密度低且不均匀,[link widoczny dla zalogowanych],或内有低、高密度结节,是宫颈癌的常见及典型表现;肿大淋巴结伴有中心低密度或坏死、边缘环状强化,是转移淋巴结的特征表现;CT扫描能够检出≥Ibl期宫颈癌,并可提供较正确的侵犯深度;CT对宫颈癌分期总正确率为69.6%,能够检出转移淋巴结,[link widoczny dla zalogowanych],检出率可达63.6%;螺旋CT薄层扫描加矢状重建图像可提高宫颈病变的检出率,有利于观察病变及阴道受侵的范围,[link widoczny dla zalogowanych]。对于<Ib期的宫颈癌可不必行CT扫描。
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