肝脏局灶性结节增生螺旋CT诊断12例

Helical CT in diagnosis of hepatic focal nodular hyperplasia

目的探讨肝脏局灶性结节增生(FNH)在螺旋CT扫描中的表现及诊断价值。方法回顾分析12例经病理证实的肝脏FNH的螺旋CT平扫及动态增强资料。结果12个病灶平扫低密度7个,等密度5个,其中8个中央见星芒状更低密度区;增强扫描:动脉期11个病灶明显强化,1个中等强化,病灶中央更低密度区无强化,5例病灶中央或周围可见增粗的血管影。门脉期及延迟期:2个等或略低密度,10个为略高密度,8例中央瘢痕中6例有延迟强化,2例无强化。结论FNH在螺旋CT平扫和动态增强扫描中具有特征表现,对FNH的确诊有重要价值。

Objective To investigate helical CT findings of hepatic focal nodular hyperplasia（FNH） and evaluate their diagnostic value. Methods To analyse retrospectively the spiral CT imaging materials of 12 FNHs proved by pathology. Results On pre-constrst scans,7 of 12 lesions were hypodense, the five lesions were isodense, 8 of 12 lesions were shown punclate, streak and radial scar with even lower hypodense. On the arterial phase scans： marked and homogenous enhance were seen in all but one lesion which was moderate enhanced,without enhancement of the central scar. 5 of 12 were shown dilated and tortuous arteries at the central or peripheral area. On the portal phase and delayed phase scans：2 of 12 lesions turned to isodense of slightly hypodense, 10 lesions remained slightly hyperdense,central scar was found in 8 lesions,2 of them showed no enhancement while the other six demon stated late enhancement. Conclusion FNH has its special characteristics on the helical CT,it has great value in diagnosing FNH.