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Fig. 4B —79-year-old woman with history of hepatitis B-related
cirrhosis for 1 year in unenhanced sonography group. Serum 
-fetoprotein
level was 800 ng/mL. Hypoechoic lesion was found in hepatic segments V-VIII
during routine sonography examination. Initial biopsy guided by conventional
sonography was negative. Sonogram obtained later in arterial phase than
A shows central area of large ringlike area (long arrow) as
being enhanced, but central area of small ringlike area (short arrow)
is not enhanced at all.
