Table 4.

Klauss’s Criteria [13]

Length of tumor contact (mm)	Circumferential Involvement (°)	Other abnormalities	Score
Veins
0	0		1
< 5	1–45		2
5–10	46–90		3
11–20	91–180	Flattened	4
21–40	181–270	Long-segment contour deformity	5
> 40	> 270	Obliteration or severe contour deformity	6
Total score			∑
Arteries
0	No		1
< 5	In Places		2
5–10	Continuously < 45		3
11–20	45–180		4
21–40	181–270		5
> 40	270 to complete obliteration		6
Total score			∑