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. 2013 Jan 7;2(1):16–24. doi: 10.1159/000346421

Fig. 5.

Fig. 5

Our classification of the various patterns of enhancement at CEIOUS in cirrhotic patients undergoing surgery for HCC. Four main patterns of CEIOUS can be recognized: A1: a typical wash-in and wash-out enhancement consistent with HCC. A2: a pattern with intranodular neoangiogenesis with wash-in and wash-out enhancement consistent with HCC. A3: a pattern of a hypoechoic nodule in any phase. B: a pattern of a nodule with the same enhancement of the surrounding liver parenchyma in any phase; this is not considered malignant.