Single-level dynamic spiral CT of hepatocellular carcinoma: Correlation between imaging features and density of tumor microvessels

Figure 3 Three patterns of intratumoral MVD distribution revealed by F₈RA immunohistochemical staining. A: Pattern I. Markedly dilated and abundant blood sinusoids with very rich positively stained sinusoidal endothelial cells and scanty tumor interstitium. B: Pattern II. Sinusoids and interstitium abundant and rich in positively stained endothelial cells (black arrow). C: Pattern III. Rich tumor interstitium with few posi-tively stained endothelial cells (white arrow) and scanty blood sinusoids.