肝脏局灶性结节增生的螺旋CT与MRI表现

Spiral CT and MRI features of focal nodular hyperplasia in liver

目的探讨肝脏局灶性结节增生(FNH)的CT及MRI表现及特点。方法收集经病理证实的FNH患者16例共20个病灶。其中12例术前行CT平扫及动态增强扫描,4例行术前MRI平扫及动态增强扫描,其中2例行CT和MRI检查。结果患者平均29.7岁,13例为单发,3例为多发,病灶平均直径为3.1cm。CT检查12例中发现14个病灶,MRI检查的4例中发现6个病灶。所有FNH病灶动脉期均明显强化。FNH可见中心疤痕50.0%(10/20),FNH可见血管移位70.0%(14/20),FNH可见血管"抱球"征30.0%(6/20)。结论 FNH在CT及MRI上具有特征性表现及不典型征象,综合识别CT及MRI征象对FNH的诊断及鉴别有重要价值。

Objective To study the CT and MRI features of focal nodular hyperplasia （FNH）of liver.Methods 16 patients with 20 FNH proved pathologically.13 of 16 were examined by CT with precontrast and postcontrast dynamic scan,5 of 16 received MRI examination with precontrast and postcontrast dynamic scan before surgery.Results The mean age of the patients was 29.7 years.Of the 16 patients,13 had single lesion and the other 3 had multiple lesions.The mean diameter was 3.1 cm.15 lesions were found in 13 patients on CT.Six lesions were found in 5 patients on MRI.All lesions were enhanced markedly in the arterial phase.Central scar,vascular displacement,vessels around the lesion were shown in 10/20,14/20,6/20 FNH.Conclusion Characteristic feature and atypical feature were revealed in FNH on CT and MRI.It is evaluable to consider it synthetically in the diagnosis and differentiation.