摘要
目的探讨肝脏局灶性结节增生(FNH)的CT、MRI征象和病理特点。方法回顾性分析经手术切除病理证实为FNH病例15例,其中7例术前行多层螺旋CT平扫及多期增强扫描,另8例行MR平扫及多期增强扫描。结果15例病灶多呈类圆形、椭圆形,少数呈分叶状;病灶直径3.0～8.0cm;病灶的边界在平扫时显示模糊,增强后显示清楚;CT平扫病灶多呈稍低或等密度,中心部分瘢痕结构呈更低密度,增强后动脉期病灶实质部分多明显均匀强化,瘢痕结构未见强化,门静脉期和延迟期实质部分强化程度下降呈稍低或等密度,瘢痕结构延迟强化,其中4例瘢痕结构可见;MRI平扫病灶呈稍长或等T1WI及T2WI信号,瘢痕结构于T2WI上呈特征性高信号,增强后三期信号变化特点类似CT三期增强特点,其中5例瘢痕结构可见;9例增强后病灶内或周围可见增粗、扭曲的动脉,在T2WI上表现为血管流空。结论熟悉FNH多种影像征象,可提高FNH术前诊断率。CT和MRI能够反映FNH病理特点及血供血管情况,可为临床选择手术方案提供重要参考。
Objective To analyze the CT/MRI features and pathology characteristics of hepatic focal nodul hyperplasia（FNH）. Methods CT/MRI images in 15 cases with confirmed FNH were retrospectively analyzed. Seven cases were performed CT examination in normal and contrast, other 8 cases were scaned with MRI. Results Of 15 cases,most of the lesions appeared rounded/ ellipse, less were lobular; the diameter ranged from 3 cm to 8 era; the margins of lesions were indistinct on prt-contrast images, and distinct in post-contrast images; all the lesions were obviously enhanced,the central scars were low dense or hypointensity, and delayed enhanced in portal vein and delayed phases,4 cases CT and 5 cases MRI; the central scars appeared hyperintensity on T2WI; Nine cases appeared thick and twist arteries beside the lesions, on T2WI appeared cavity flow. Conclusion Diagnostic rate can be increased when knowing well with FNH and CT/MRI can provide the information about pathology characteristics and blood supply of FNH,and so as to improve preoperative diagnosis rate.
出处
《肝脏》
2009年第2期119-122,共4页
Chinese Hepatology
