Table 14.
Depth of invasion of SM cancer and lymph node metastasis (modified from Ref. [127])
| SM invasion distance (μm) | Pedunculated | Non-pedunculated | ||
|---|---|---|---|---|
| Number of lesions | n (+) (%) | Number of lesions | n (+) (%) | |
| Head invasion | 53 | 3 (5.7) | ||
| 0 < X < 500 | 10 | 0 (0) | 65 | 0 (0) |
| 500 ≤ X < 1,000 | 7 | 0 (0) | 58 | 0 (0) |
| 1,000 ≤ X < 1,500 | 11 | 1 (9.1) | 52 | 6 (11.5) |
| 1,500 ≤ X < 2,000 | 7 | 1 (14.3) | 82 | 10 (12.2) |
| 2,000 ≤ X < 2,500 | 10 | 1 (10.0) | 84 | 13 (15.5) |
| 2,500 ≤ X < 3,000 | 4 | 0 (0) | 71 | 8 (11.3) |
| 3,000 ≤ X < 3,500 | 9 | 2 (22.2) | 72 | 5 (6.9) |
| 3,500 ≤ X | 30 | 2 (6.7) | 240 | 35 (14.6) |
The incidence of lymph node metastasis among patients with a depth of invasion of 1000 μm or above was 12.5 %
All 3 lymph node metastasis-positive patients with head invasion were ly positive