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 |  |  | ∑ |