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Fig. 2B —Small unknown liver metastasis in 48-year-old man with
colonic adenocarcinoma. Contrast-enhanced delayed phase (85 seconds)
sonography image obtained in pulse subtraction imaging (PSI) mode (A)
and corresponding baseline sonography image (B) of right lobe of liver
show subcentimeter lesion (arrow, A) detected as nodular
enhancement defect (hypoechoic area) that was not visible on baseline
sonography.