Role and pitfalls of hepatic helical multi-phase CT scanning in differential diagnosis of small hemangioma and small hepatocellular carcinoma

Figure 4 SHCC confirmed by surgery. A. Plain scan demonstrated a small hypoattenuating lesion in the right lobe, the edge was clear (arrow). B. Arterial phase CT scan demonstrates the lesion enhanced homogenously and became hyperdense (arrow). C. Portal venous phase CT scan demonstrated the lesion was isodense and could not be found (arrow). D. Delay phase scan demonstrated the lesion was hypodense with clear boundary (arrow).