Hepatocellular Adenoma: Evaluation with Contrast-Enhanced Ultrasound and MRI and Correlation with Pathologic and Phenotypic Classification in 26 Lesions

Figure 2

Inflammatory HCA (with less typical imaging features): (a) the 5 cm lesion has slight and homogeneous enhancement after microbubble contrast agent injection and (b) becomes isoechoic relative to the adjacent liver parenchyma. (c) The lesion (black arrow) located in segment II is isointense on T1W images with (d) a drop-out signal on chemical shift images and (e) hypointense on T2 fat-suppressed images. (f) The arterial enhancement is slight (g) with a wash out in the delayed phase. (h) Macroscopic picture: well-limited, nonencapsulated tan-colour lesion without haemorrhagic changes. (i, j) The tumour shows moderate telangiectasia (30%, arrow head) mixed with steatotic hepatocytes (40%, black arrow).

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