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Biliary cystadenocarcinoma. A: Conventional sonography shows a multilocular cystic lesion in left lobe of the liver with nodular thickening of internal septa and mural nodules projecting into the cyst (arrow); B: Conventional sonography shows septal calcifications or stones (arrowhead); C: Color doppler flow imaging (CDFI) shows affluent vascularity in the internal septa (arrows).
