MSCT diagnosis of hepatic focal nodular hyperplasia

Objective: To study the features of focal nodular hyperplasia(FNH) on multislice spiral computed tomography and to improve its diagnostic accuracy.Methods: MSCT images pre-and post-3-phase dynamic enhancement in 13 patients(13 lesions in total) with pathology proved FNH were analyzed retrospectively.Results:On pre-contrast scans,10 of 13 lesions were hypodense,and 3 of 13 were isodense.Nine of 13 lesions showed punctuated-shaped,streak and radial scar.On the arterial phase scans,all lesions were markedly and homogeneously enhanced except the central scar area.Tortuous and dilated arteries were seen at the center or peripheral area in 6 out of 13 lesions.On the portal phase and delayed phase scans,11 of 13 lesions turned into isodense of slightly hypodense,two lesions remained slightly hyperdense.Central scar was found in 9 FNH lesions,3 of them showed no enhancement while the other six demonstrated late enhancement.Conclusion: MSCT scanning can fully reflect pathologic features of FNH and the blood supplying,and,therefore,it is of great value in diagnosing and differentiating FNH.