CT,MRI and ultrasonography features of hepatic angiomyolipomas:an retrospective analysis of 15 cases

Objective To summarize CT,MRI and ultrasonography manifestations of hepatic angiomyolipomas(HAML),and investigate the application and value of CT,MRI and ultrasonography on HAML. Methods Total 15 cases of HAML confirmed by surgery or pierced pathology testing in our hospital from April,2011 to March,2016 were retrospective analyzed,the CT,MRI or ultrasonography features of HAML were typing discussed,the imaging features of different types of HAML were summarized. Results Fifteen patients underwent CT examination,5 patients underwent MRI examination,4 patients underwent US examination,and 1 patient underwent CT,MRI and US examination.Fibroids(2 cases):tiny little adipose tissue was seen in CT,MRI;inhomogeneous hypoechoic was seen in US.Lipoma type(5 cases):diffuse fat density was seen in CT,and twisted vascular shadow was senn after enhancement;high signal was seen in T₁WI,T₂WI of MRI,slight enhancement in the arterial phase was seen after enhancement;Hyperechoic was seen in US.Hemangioma type(3 cases):tumor density was seen in CT,internal partially calcified,significantly continuing enhanced after enhancement;low signal was seen in T₁WI of MRI,and high signal was seen in T₂WI.Mixed(5 cases):Intermixed signal of tissue density and fat density was seen in CT,no enhancement in fat after enhancement;inhomogeneous high signal was seen in T₁WI,T₂WI of MRI;solid uneven hyperechoic was seen in US. Conclusion CT,MR and ultrasound imaging features of different subtypes of HAML patients were different.The patients could be diagnosed based on the fat ingredient in tumor.