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Conventional ultrasound and CEUS images of gallbladder adenoma canceration. A: An isoechoic nodule (arrow) is seen in the body of the gallbladder wall on conventional ultrasound. The diameter of the lesion is about 1.8 cm; B, C: CEUS images: 18 s after injection of contrast agent, the lesion (arrow) shows hyperenhancement and the gallbladder wall structure beneath the lesion is not clear (B); 34 s after injection of contrast agent, the lesion (arrow) becomes hypoenhancement (C).
