肝脏局灶性结节性增生2例报告及文献复习

目的通过分析肝脏局灶性结节增生的影像表现，提高其诊断准确性。方法2例经手术病理证实的肝脏局灶性结节增生患者均接受超声、CT和MRI检查，其影像表现结合文献复习进行了分析。结果超声显示了2例的肝右叶实性占位性病变。1例CT平扫肝右叶病灶显示不清，增强扫描后，肝右叶前段有一直径约3．1cm的类圆形病灶呈均匀强化。MR平扫见2例的肝内结节病灶均呈等T1、等T2信号，增强扫描动脉期病灶明显强化，门脉期和延迟期病灶的强化程度逐渐下降。结论腹部超声可提示本病的诊断，而CT和MRI，尤其是增强扫描，可清晰显示病灶的血供特点和强化特征，为定性诊断提供重要依据。

Focal nodular hyperplasia of the liver:report of 2 cases and review of the literature

Objective To elevate the diagnostic accuracy of focal nodular hyperplasia(FNH)of the liver through analyzing its imaging findings.Methods Two patients with surgically and pathologically proved FNH of the liver underwent ultrasonography,CT and MRI before and after contrast enhancement.Results Ultrasonography showed the intrahepatic space-occupying lesions in 2 cases.On plain CT scans,the FNH lesion arising within hepatic right lobe of 1 case did not be clearly displayed.Following contrast enhancement,there was a near-round lesion with diameter of 3.1 cm in anterior end of hepatic right lobe,which appeared as homogeneous enhancement.On non-enhanced MR T1W and T2W images ,all the FNH lesions were isointense.In arterial phase after administration of contrast medium,all the lesions were vigorously and homogeneously enhanced but in subsequent portal phase and delayed phase,the enhanced intensity of the lesions was progressively declined.Conclusion Ultrasonography can suggest the diagnosis of this disease,whereas CT and MRI,especialy their enhanced scans can clearly reveal the vascularity and enhanced features of the FNH lesions and thus can provide important evidence for the qualitative diagnosis.