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Fig. 1 Drawing shows patterns of changes on contrast-enhanced
sonography. From top to bottom in far right column: complete hypoechoic
response with hyperechoic spot (n = 1), complete hypoechoic response
with no hyperechoic spot (n = 6), marginal isoechoic response with
hyperechoic spot (n = 9), marginal isoechoic response with no
hyperechoic spot (n = 15), and hyperechoic response (n =3)
(bottom row).