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Click 71-year-old man with hepatic angiosarcoma on initial dynamic triple phase CT shows, atleast two iso-hypo attenuating lesions with peripheral arterial enhancement, in the caudate and segment IV of liver. The portal-venous and equilibrium phases of contrast-enhanced CT shows progressive centripetal heterogenous contrast enhancement of the segment IV lesion and peripheral as well as faint central enhancement of the caudate lobe lesion.

Click 71-year-old man with hepatic angiosarcoma on hepatocyte specific contrast enhanced dynamic MRI. The arterial phase contrast-enhanced gradient echo T1weighted sequence shows faint peripheral rim enhancement of the segment IV lesion. The portal-venous phase reveals progressive enhancement of the segment IV lesion and heterogenous peripheral enhancement of the caudate lobe lesion. The equilibrium phase shows centrifugal heterogenous enhancement of both lesions however density of enhancement is less than that of aorta in all phases. Delayed hepatobiliary phase after contrast enhanced dynamic MRI shows almost homogenous enhancement of the entire liver parenchyma without any obvious hypointense defect or lesion.

Click Follow up scan after 4 months of 71-year-old man with hepatic angiosarcoma on dynamic triple phase CT. The arterial phase contrast-enhanced CT shows increase in size of the previously visualized lesions with increased hypervascularity. In addition there appear to be more number of lesions with gross liver parenchymal heterogeneity. The portal-venous phase shows peripheral heterogenous contrast enhancement of the segment IV lesion and minimal peripheral as well as central enhancement of the caudate lobe lesion. It also shows multiple new arterial enhancing lesions of varying sizes studded in the entire liver parenchyma.