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Figure 6c. Hepatocellular adenoma in a 40-year-old woman with a history of oral contraception who was being evaluated for blunt abdominal trauma. (a) Baseline US image shows a subtle hyperechoic area (arrow). Contrast-enhanced US was performed to rule out liver injury. (b) Arterial phase US image obtained 21 seconds after contrast material injection demonstrates early, marked lesion enhancement (arrow). K = kidney. (c) Portal phase US image obtained 55 seconds after injection demonstrates subtle but persistent enhancement (arrow). K = kidney.
