Application of spiral CT in diagnosis of hepatic focal nodular hyperplasia

Objective: To analyze enhanced spiral CT scan images of hepatic focal nodular hyperplasia(FNH) in order to improve the accuracy of diagnosis of FNH.Methods: Retrospective analysis of CT scan images of 15(16 lesions) pathology confirmed FNH patients including plain scan,and enhanced arterial phase(25 s),portal venous phase(60 s),delay period(180 ~ 300 s) were conducted.Results:FNH is more commonly among young people with no obvious clinical symptoms,and it mainly presented in the liver surface with clear lesion boundary.The plain scan showed 13 lesions with slightly low-density,the other 3 lesions with normal density.Dots or small pieces of low-density central scar shadow were revealed in 10 lesions.Under enhanced Ct scan,except the central scar shadow the images were obviously enhanced,of which shadow with increased density or torched veins were revealed in centre or margins of 5 lesions,high density shadow and slightly high density was presented in 3 and 9 lesions at the portal venous phase,16 at delay period.Central scars of 8 lesions showed delayed enhancement,while 2 didn't.Conclusions:Characters of enhanced spiral CT scan images is helpful for the diagnosis and differential diagnosis of FNH thus contributes to prevention of unnecessary treatments.