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Fig. 4B 56-year-old man with hypoattenuating lesion that progressed
to entirely hyperattenuating lesion (overt HCC) (group B2) without detection
of hyper-in-hypoattenuating type lesion (nodule-in-nodule HCC). 22nd follow-up
arterial phase CT scan 6 years after A shows lesion is
isoattenuating.