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Fig. 2 —Bar graph shows accuracy for contrast-enhanced sonography
group (light gray) and unenhanced sonography group (black)
in diagnosis of malignant lesions by lesion size. There was statistically
significant difference between contrast-enhanced sonography group and
unenhanced sonography group in accuracy for diagnosis of malignant lesions
2.0 cm (97.1% [n = 34/35] vs 78.8% [n = 26/33],
respectively; 
2 = 3.886, p = 0.0490).
