肝局限性结节状增生的超声造影表现与病灶大小的关系

目的探讨肝局限性结节状增生（FNH）在超声造影中的增强模式及中央瘢痕与病灶大小的关系。方法采用超声造影技术对44例肝FNH患者的44个病灶进行检查,分为小病灶组（直径〈3cm,n=25）及大病灶组（直径≥3cm,n=19）,对病灶在超声造影的动脉期增强模式、中央星状瘢痕的影像表现进行分析。结果动脉期增强模式：小病灶组有18例（72.0%,18/25）、大病灶组有14例（73.6%,14/19）于动脉早期呈轮辐状离心性强化,两组差异无统计学意义,其他病灶则均为全瘤迅速强化。中央星状瘢痕：小病灶组于延迟期发现4个低增强中央瘢痕（16.0%,4/25）,大病灶组可见10个低增强中央瘢痕（52.6%,10/19）,两组差异有统计学意义（P〈0.05）。结论两组的FNH动脉期轮辐状离心性强化的检出率均较高。低增强中央瘢痕在大病灶组检出率较高,但在小病灶组的检出率较低。

The relationship between typical signs of focal nodular hyperplasia and lesion size using contrast-enhanced ultrasonography

Objective To investigate the relationship between typical signs of focal nodular hyperplasia （ FNH） and lesion size using contrast-enhanced ultrasound （ CEUS） . Methods 44 FNH patients with 44 lesions underwent examination of CEUS to observe the spoke-wheel arteries enhancement in arterial phase and central stellar scar in delayed phase. All lesions were classified into two groups,big lesion group （ ≥3 cm,in diameter,n =19） and small lesion group （ 3 cm,in diameter,n =25） . Results The number of the lesions with spoke-wheel arteries,centrifugal filling in arterial phase were 18（ 72. 0% ,18/25） in small lesion group and 14（ 73. 6% ,14/19） in big lesion group,respectively,other lesions showed completely hyper- enhancing in arterial phase. The central scar in delayed phase was exhibited in 4 lesions（ 16% ,4/25） in small lesion group and 10 lesions （ 52. 6% ,10/19） in big lesion group,respectively （ P 〈0. 05） . Conclusions The spoke-wheel arterial enhancement in arterial phase were easy to be observed in two groups. The central scar in delayed phase were much easier observed in big lesion group than in small lesion group.