Table 2. Lymph node metastasis rate according to the tumor length and volume.
| Tumor diameter (cm) | Each group (n, %) | Accumulation (n, %) | Tumor volume (cm 3) | Each group (n, %) | Accumulation (n, %) |
|---|---|---|---|---|---|
| ≤ 0.5 | 0/4 (0) | 0/4 (0) | ≤ 50 | 0/21 (0) | 0/21 (0) |
| 0.5–1.0 | 1/20 (5.0) | 1/24 (4.2) | 50–100 | 2/29 (6.9) | 2/50 (4.0) |
| 1.0–1.5 | 3/27 (14.8) | 4/51 (7.8) | 100–200 | 2/49 (4.1) | 4/99 (4.0) |
| 1.5–2.0 | 2/67 (14.9) | 6/118 (5.1) | 200–400 | 1/76 (1.3) | 5/175 (2.9) |
| 2.0–2.5 | 1/53 (1.9) | 7/171 (4.1) | 400–800 | 6/84 (7.1) | 11/259 (4.2) |
| 2.5–3.0 | 1/50 (2.0) | 8/221 (3.6) | 800–1600 | 4/49 (13.3) | 15/308 (4.9) |
| 3.0–3.5 | 1/26 (3.8) | 9/247 (3.6) | 1600–3200 | 4/30 (12.1) | 19/338 (5.6) |
| 3.5–4.0 | 6/31 (19.4) | 15/278 (5.4) | 3200–6400 | 0/7 (0) | 19/345 (5.5) |
| > 4.0 | 4/68 (5.9) | 19/346 (5.5) | > 6400 | 0/1 (0) | 19/346 (5.5) |