Caption: Supine transabdominal ultrasound of the right kidney
Description: Cyst-like lesion in the upper pole. The lesion contains mobile hyperechogenic material that causes a weak posterior acoustic shadow
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Caption: Color Doppler examination
Description: Note Twinkling artifact arising from the content of the cyst.
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Caption: Color Doppler of cyst
Description: Note "mosaic" pattern of color Doppler, indicating that the color represents an artifact, not flow within the cyst.
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