Abstract: Objective To investigate the ultrasonographic characteristics of liver focal nodular hyperplasia(FNH),and to evaluate the application of ultrasound in FNH diagnosis.Methods The findings of two-dimensional gray scale ultrasound and color Doppler ultrasound were reviewed retrospectively,which included 16 nodules form 14 patients.All of the nodules were proved pathologically as FNH.ResultsThe detection rate of FNH by two-dimensional gray scale ultrasound was 100%.By conventional grey scaleultrasound,10 nodules located in right lobe of liver,5 nodules located in left lobe of liver and 1 nodule located between right and left lobe of liver,6 nodules were isoechoic or slightly hypoechoic,8 nodules were hypoechoic,and 2nodules were hyperechoic.Color flow with arterial spectrum was detected in 12 nodules,and radiated wheal like color flow was visualized in 4 nodules.The maximal velocity was 58.5cm/s(26.1~121.6cm/s),and the resistent index was 0.51(0.36~0.81).The result of blood tests showed all patients were AFP negative.ConclusionsUl trasonography of FNH is characteristic.Gray scale sonography combined with color Doppler ultrasound and AFP tests can improve the diagnostic accuracy of FNH.

Key words: Ultrasonography, Liver, Focal nodular hyperphasia