Simple margin definition

Fig. 29.9. CT images in the portovenous phase of two different patients suffering from extrahepatic malignancies. In the patient on the left side, a small, sharply delineated lesion without contrast uptake and CT values of 5-10 HU is depicted. This lesion can be characterized as a simple cyst despite the small size of only 0.8 cm in diameter. The large hypodense lesion on the right side shows CT values of 15-20 HU (arrows) and might on first glance be confused with a cyst however, definite morphological signs like the unclear margins (curved arrow) in...

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