肝局灶结节性增生MRI分析

MRI analasys of hepatic focal nodular hyperplasia

目的对肝局灶结节性增生的磁共振影像特点和鉴别诊断进行分析。方法回顾性分析15例经过病理证实的肝局灶结节性增生患者的磁共振图像。结果 15例肝局灶结节性增生均显示为单一病灶。在T1WI中,有14个病灶表现为等或略低信号,1个病灶呈略高信号。在T2WI中所有病灶显示为等或略高信号影,并在12个病灶中显示中央瘢痕为高信号。动脉期所有病灶的实质部分均明显强化,在门静脉和延迟期呈等或略高信号影。有12个病灶显示内部瘢痕样强化。结论磁共振平扫和增强图像能够反映大多数肝局灶结节性增生的病理学特点。

Objective To analyze MRI features and the diferential diagnosis of hepatic focal nodular hyperplasia （FNH）. Methods The MR images of 15 patients proven by pathology were analyzed retrospectively. Results FNH was solitary in 15 cases. On TIWI 14 lesions demonstrated typical isointensity or slightly hypointensity, one lesions presented slightly hyperintensity. On T2WI all lesions appeared typical isointensity or slightly hyperintensity, and the scars of 12 lesions were showed hyperintensity. In the arterial phase of dynamic contrast - enhanced MR/, 15 FNHs were markedly hyperintense and iso - or slightly hyperintense in the portal and delayed phases. There were 12 cases which the scars were showed hyperintensity in the portal and delayed phases. Conclusion Unenched and dynamic enhanced MRI of FNH can reflect its pathologic characteristics in most cases.