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Figure 8b. Focal nodular hyperplasia. (a) Axial arterial phase T1-weighted MR image shows a lobulated, well-circumscribed tumor with intense and uniform enhancement (arrow). (b) Axial opposed-phase T1-weighted GRE image shows a patchy peripheral focus of low signal intensity (arrow), which represents a focal fat deposit. (c) Photomicrograph (original magnification, x200; hematoxylin-eosin stain) shows intracellular fat vacuoles (arrow).
