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Fig. 4C —43-year-old man with focal nodular hyperplasia. Axial
gadolinium-enhanced MR images of liver obtained 42 months later show interval
enlargement of mass (arrow) (now 23 x 19 mm). Despite its
interval growth, mass has not changed in character; it homogeneously
hyperenhances on arterial phase (B) and fades to isointensity on portal
venous phase (C). Because of its interval growth, biopsy was performed.
Histologic diagnosis was focal nodular hyperplasia. MRI features are
illustrative of transient hepatic intensifying mass.
