Table 3.

Washout onset and degree in the characterization of malignant focal liver lesions by CEUS

Washout onset
Washout degree	Early (<60 s)	Late (≥60 s)
Marked	Typical of ICC and metastases	Suggests malignancy in general, not specific for any particular type
Mild	Suggests malignancy in general, not specific for any particular type	Typical of HCC and HCC precursor nodules

Based on the CEUS LI-RADS recommendations of the American College of Radiology [16].

CEUS, contrast-enhanced ultrasonography; ICC, intrahepatic cholangiocellular carcinoma; HCC, hepatocellular carcinoma; LI-RADS, Liver Reporting and Data System.