摘要
目的评估磁共振成像(MRI)对肝局灶结节性增生(focal nodular hyperplasia,FNH)的诊断价值。方法前瞻性分析15例经病理证实 FNH 的 MRI 平扫、多时相动态增强表现和诊断。结果 13例为单发病灶,1例8个病灶,1例10个病灶。T_1WI 上26个病灶为稍低或等信号、5个病灶为稍高信号,T_2WI 上28个病灶呈稍高信号、1个病灶等信号、2个病灶稍低信号;29个病灶在注射Gd-DTPA 后动脉期明显增强、门静脉期和延迟期增强的程度下降;2个病灶无增强。14个病灶检出瘢痕,T_1WI 呈低信号、T_2WI 高信号,动脉期无增强、门静脉期或延迟期增强。2例少血供和2例多发病灶在应用超顺磁氧化铁之后 T_2WI 的信号明显降低。14例准确诊断为 FNH,1例诊断为良性病变。结论 MRI 能显示 FNH 的特征性改变并在术前正确诊断多数 FNH。
Objective To determine the value of MRI for diagnosis of focal nodular hyperplasia （FNH） of the liver. Methods The precontrast and postcontrast MR images of 15 cases of pathologically proved FNH were prospectively analyzed. Results Solitary lesions were found in 13 out of the 15 cases. Of these 13 cases, 1 had 8 lesions and 1 had 10. Twenty-six lesions were slightly hypointense or isointense and 5 hyperintense on T1WI. Twenty-eight lesions were slightly hyperintense, 1 isointense and 2 hyperintense on T2WI. Twenty-nine lesions showed strong enhancement during the arterial phase but slight or no enhancement during the portal venous phase. There was no enhancement in 2 lesions during the arterial phase, portal venous phase and delayed phase. The central scar was detected in 14 lesions. These 14 lesions, which were hypointense on T1WI and hyperintense on T2WI, showed no enhancement during arterial phase and portal venous phase but slight or moderate enhancement during the delayed phase. FNH was correctly diagnosed in 14 cases and benign tumor in 1. Conclusions MRI findings can reveal the typical features of FNH. So it can be used to diagnose most of the cases of FNH of the liver before operation.
出处
《中华肝胆外科杂志》
CAS
CSCD
2006年第5期298-300,共3页
Chinese Journal of Hepatobiliary Surgery
