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Figure 4c. Large hemangioma in a 56-year-old woman with rectal cancer. (a) Baseline US image shows a heterogeneously hypoechoic lesion (arrow). (b) Arterial phase US image obtained 22 seconds after contrast material injection demonstrates peripheral globular enhancement (large arrow) and a perilesional vessel (small arrow). (c) Portal phase US image obtained 93 seconds after injection demonstrates centripetal (albeit incomplete) lesion enhancement (large arrow), which is clearly hyperechoic relative to the surrounding parenchyma. Small arrow indicates the perilesional vessel. (d) Portal phase computed tomographic (CT) scan shows a hyperattenuating lesion with small central areas of poor enhancement (arrow).
