论文部分内容阅读
目的探讨脾脏硬化性血管瘤样结节性转化(SANT)的MRI特征。方法回顾性分析10例经手术病理证实的脾脏SANT患者的MRI资料,总结其影像特征。10例均行MR平扫及多期增强扫描,其中7例行扩散加权成像(DWI)及双回波同反相位磁共振成像(IP/OP)。结果 (1)单发9例,均为类圆形肿块,4例(44.4%)见假包膜;T1WI呈等或低信号;T2WI呈不均匀低信号8例(88.9%),不均匀稍高信号1例(11.1%);动态增强扫描均为向心性、渐进性强化,其中辐条轮状强化7例(77.8%),明显结节样强化2例(22.2%),延迟期呈等或高信号,内均见裂隙;7例DWI检查中,低信号6例(85.7%),等信号1例(14.3%);病灶内出血2例(22.2%),均未见坏死囊变。(2)多发1例,表现为脾内弥漫分布的类圆形小结节(>10个),T1WI均为等信号,T2WI为高信号,增强扫描渐进性强化。结论单发脾SANT的MRI表现有一定的特征性,特别是病灶周围假包膜有助于本病的诊断;多发SANT与脾脏其他脉管性肿瘤鉴别困难。
Objective To investigate the MRI features of splenic sclerosing hemangioma-like nodular transformation (SANT). Methods MRI data of 10 splenectomized SANT patients confirmed by surgery and pathology were retrospectively analyzed, and their imaging features were summarized. All 10 patients underwent MR scan and multi-phase enhanced scan. Among them, 7 patients underwent diffusion-weighted imaging (DWI) and double-echo MRI with inverted phase contrast imaging (IP / OP). Results: (1) Nine cases were single, all of which were round lumps. Forty cases (44.4%) had pseudomembranous occlusion. T1WI showed equal or low signal intensity. There were 8 cases (88.9% One case of high signal (11.1%); dynamic contrast-enhanced scanning were concentric, progressive enhancement, of which spoke spoke round enhancement in seven cases (77.8%), nodular enhancement in two cases (22.2% There were 6 cases (85.7%) with low signal and 1 case with equal signal (14.3%) in 7 cases of DWI and 2 cases (22.2%) with intracerebral hemorrhage in high signal. (2) Multiple recurrent cases were found in 1 case, with small circular nodules (> 10) diffusely distributed in the spleen. T1WI was equal signal, T2WI was high signal, and enhanced scan enhanced gradually. Conclusions Single splenic SANT has certain MRI features, especially the pseudocapsule around the lesion, which is helpful for the diagnosis of this disease. Multiple SANT is difficult to differentiate from other vasculature of the spleen.