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FIG 1. Sonograms.
A, Gray-scale sonogram shows a well-defined 1.6 x 2-cm mass with posterior acoustic enhancement. An echogenic central septum (white arrow) and slightly low echoic peripheral thick wall (white arrowheads) are seen.
B, Color Doppler sonogram shows increased vascularity at the septal solid portion of the lesion (white arrows).
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