Table 2. Submucosal and LVI detection rates in 401 EGC lesions according to section intervals of resected specimen.
| Variables | Submucosal invasion | LVI | |||
|---|---|---|---|---|---|
| No. (%) | P* | No (%) | P* | ||
| Reference 2-mm interval section | 117 (100.0) | - | 38 (100.0) | - | |
| 4-mm interval section | |||||
| 2n | 103 (88.0) | 0.0002 | 33 (86.8) | 0.0253 | |
| 2n+1 | 106 (90.6) | 0.0009 | 22 (57.9) | 0.0001 | |
| Detected in all sections | 92 (78.6) | - | 17 (44.7) | - | |
| 6-mm interval section | |||||
| 3n | 90 (76.9) | <0.0001 | 21 (55.3) | <0.0001 | |
| 3n+1 | 94 (80.3) | <0.0001 | 22 (57.9) | 0.0001 | |
| 3n+2 | 85 (72.7) | <0.0001 | 24 (63.2) | 0.0002 | |
| Detected in all sections | 61 (52.1) | - | 9 (23.7) | - | |
LVI = lymphovascular invasion; EGC = early gastric cancer
*P-values calculated using McNemar's test compared to results from the reference 2-mm interval sections.