Fig. 1

MDCT transverse section image of venous phase. (a) 0 point: The mass penetrated the gastric wall, and there was no blood vessel adjacent to the tumor lesion (white arrow). (b) 1 point: The mass extended slightly outwards through the gastric wall, but the adjacent blood vessel is not involved (white arrow). (c) 2 point: The mass penetrated the gastric wall, with blood vessels around the tumor lesion, but vascular lumen was normal and there was no tumor density shadow inside the lumen (white arrow). (d) 3 point: The mass presented as nodular extension to the blood vessels surrounding the stomach, with slight dilation of the affected vessels and filling defects seen within (white arrow). (e) 4 point: The mass presented as multiple nodules extending into the blood vessels surrounding the stomach, with significant dilation and irregular morphology of the affected vessels, and filling defects seen within (white arrow)