|
| US | CT scan | MRI |
|
|
Hemangioma | (i) hyperechoic | (i) low attenuation on the noncontrast CT | hyperintense on T2 |
| (ii) well-defined or lobulated borders | (ii) peripheral nodular enhancement |
|
| Focal nodular hyperplasia (FNH) | (i) isoechoic | early enhancement with characteristic central scar | hypointense with central scare which is hyperintense on T2 |
| (ii) well-defined borders |
|
| Hepatic adenoma | discretely hypoechoic | early enhancement | hyperintense on T1 and T2 |
|
|
Hepatocellular carcinoma | (i) hypoechoic, heterogeneous | (i) early and heterogeneous enhancement |
hypointense on T1 and hyperintense on T2 |
| (ii) portal thrombosis | (ii) hypodense, with only the capsule enhancing, on delayed-phase |
| (iii) portal vein occlusion from venous invasion with intraluminal tumor present and expansion of the vessel |
|
|
Metastatic disease | (i) multiple hypoechoic lesions |
thick and irregular rim with enhancement | (i) mildly hyperintense to liver |
| (ii) lesions with a hypoechoic rim or halo pattern | (ii) irregular or rim enhancement |
|
|
IPT of the liver | (i) usually unique | (i) low attenuation on the noncontrast CT | (i) hypointense on T1, hyperintense on T2 |
| (ii) hypoechoic | (ii) late and peripheral enhancement | (ii) heterogenic enhancement |
| (iii) well-defined borders | (iii) venous occlusion from gross thickening of the wall of the vein | |
|
