Table 1.

CT criteria of EMVI status for gastric cancer

CT-defined EMVI Score	Typical Imaging Features
0	The lesion does not penetrate the gastric wall, and there are no extramural blood vessels adjacent to the tumor area
1	Slight extramural nodular extension, but no exhibition of any invasion into the vascular structure outside the tumor region
2	The mass penetrates the gastric wall,with extramural blood vessels in the vicinity of the tumor area, but there is no tumor density shadow within the vascular lumen, and these vessels are of normal caliber
3	The mass penetrates the gastric wall and extends in a strip shape into the extramural vascular lumen, whereas the caliber of these involved vessels is only slightly expanded
4	Obvious tubular or nodular soft-tissue extends irregularly into the extramural vascular luminal cavity with distinct distention of the vessel lumen

EMVI, extramural venous invasion.