摘要
目的：探讨肝脏孤立性坏死结节（SNN）的MRI表现。方法：收集我院2009年11月至2014年9月行MRI检查并经手术病理证实的SNN共40例,回顾性分析该病影像特征。结果：单结节病灶26例、多结节病灶14例。病灶最大径0.7~5.6cm（2.42±0.98cm）,30例≤3cm、10例〉3cm;分别位于肝右叶34例、肝左叶4例、中肝叶2例,病灶分布于肝缘下35例、肝脏深部5例;病灶呈圆形或椭圆形18例、葫芦状14例、蚯蚓状8例。T1WI示所有病灶均为低/等信号,T2WI示病灶呈稍高/等信号32例、稍低信号8例,增强后病灶实质均无强化,病灶周缘均可见薄环状强化,环壁厚0.87~3.05mm（2.09±0.52mm）,14例病灶内见间隔线强化。结论：肝脏孤立性坏死结节多见于肝右叶肝缘下,通常最大径≤3cm,MRI增强表现为周缘薄环状强化,典型表现可以提示SNN的诊断。
Purpose： To evaluate the MR findings of solitary necrotic nodule （SNN） of the liver. Meth- ods： From Nov. 2009 to Sep. 2014, forty patients with histologically confirmed solitary necrotic nodule of the liver who underwent MR examination at our institution were retrospectively analyzed. MR findings were correlated with histopathology results. Results： The lesions were uni-nodular in 26 cases and multi- nodular in 14 cases. The long diameter range of the cases was 0.7-5.6 cm （2.42＋0.98cm）, thirty cases were less than or equal to 3.0 cm and 10 cases were larger than 3.0 cm. Thirty-four cases were located in the right lobe of the liver, four in the left lobe and two in the middle lobe. Thirty-five lesions were found in the subcapsular region, while five lesions were located within the hepatic parenchyma. On TlWI, solitary necrotic nodule of the liver appeared hypo-intense or iso-intense in all cases. On T2WI, 32 cases were hyper-intense or iso-intense, 8 were hypo-intense. After injection of gadopentetate dimeglumine, all lesions showed no enhancement. The capsule showed delayed enhancement in all lesions, the thickness of capsule was 0.87-3.05mm （2.09＋0.52mm）, and fourteen lesions showed delayed septa enhancement on MR images. Conclusion： SNN is usually in the subcapsular region of the right hepatic lobe, and the long diameter is not larger than 3.0 cm. The capsule enhancement may be the most characteristic feature of solitary necrotic nodule of the liver on MR images, which is valuable for the diagnosis.
出处
《中国医学计算机成像杂志》
CSCD
北大核心
2015年第3期241-245,共5页
Chinese Computed Medical Imaging
基金
上海市卫生局青年科研项目No.20134y120~~
