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Non-cirrhotic liver. A well circumscribed lobulated mass is seen in liver segment IVb. This lesion is minimally hypointense on both the T1 and T2 weighted images and does not contain fat. A subtle central T2 hyperintense scar is evident. Background of intracellular hepatic steatosis with relative loss of signal on the out-of-phase sequence.
Following administration of Primovist (GD EOB DTPA) T1 FS images showed avid enhancement during the arterial phase followed by iso/slight hyperintensity during the portal venous phase. The 20 minutes delayed image demonstrate persistent intralesional hyperintensity and this confirms the diagnosis of FNH.