文档介绍：16层螺旋CT对直肠间质瘤的影像诊断
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作者:高德培王关顺封俊李鹍张莹李云峰
【摘要】目的探讨直肠间质瘤在16层螺旋CT影像上的表现和诊断。方法回顾性分析17例经手术病理证实的直肠间质瘤的16层螺旋CT表现。使用Siemens sensation 16层螺旋CT检查,17例均行平扫和增强。结果(1)盆腔内直肠壁或直肠周围软组织肿块,大小不等,肿块与直肠壁关系密切;(2)直肠不同程度的受压、变窄,肿块主要向直肠腔外生长,对周围组织产生推挤压迫;(3)径线在5cm以下肿瘤平扫时密度稍低,但均匀,增强时表现为中等度均匀强化,无坏死;径线在5cm以上10例肿块密度平扫时呈稍低密度且不均匀,CT值25-35Hu,增强时较大的肿瘤边缘带中等度结节样强化,CT值50-60Hu,肿块中心部分无强化,呈坏死样改变。结论直肠间质瘤在16层螺旋CT影像上有一定影像特征,可帮助术前定位、定性和分级。
【关键词】直肠; 间质瘤; 螺旋CT
[Abstract] Objective To investigate 16-slices spiral CT manifestations and diagnosis in rectal interstitialom. Methods 16-slices spiral CT finding of 17 cases with rectal interstitialoma by surgically and pathologically confirmed were analyzed retrospectively. All cases performed noncontrast and contrast-enhanced CT images with Siemens sensation 16-slices spiral CT. Results CT showed a intrapelvic mass of rectal wall or surrounding soft tissue with inequality of size, relation closeness with intestinal wall; rectall wall different pression and narrowing,and extruding surrounding 5cm tumor density were slightly reduced,but symmetrical. Exceed 5cm tumor moderately enhanced, but asymmetrical. CT value of major mass were 25-35Hu, with boundary zone nodule enhancement, contrast-enhanced CT value 50-60Hu, and centricity necrosis. Conclusion Rectum interstitialoma has some features in 16-slices spiral CT imaging, w