Table 3. Correlation between lymph node micrometastasis and clinicopathological findings.
|
Micrometastasis (%)
|
|||
|---|---|---|---|
| Variables | −(n=55) | +(n=25) | P-value |
| Tumour location | |||
| Upper | 10 (83.3) | 2 (16.7) | 0.4935 |
| Middle | 30 (66.7) | 15 (33.3) | |
| Lower | 15 (65.2) | 8 (34.8) | |
| Histological type | |||
| Differentiated | 28 (71.8) | 11 (28.2) | 0.5666 |
| Undifferentiated | 27 (65.9) | 14 (34.1) | |
| Depth of tumour invasion | |||
| pT1 | 54 (73.0) | 20 (27.0) | 0.0042 |
| pT2 | 1 (16.7) | 5 (83.3) | |
| Venous invasion a | |||
| Negative | 52 (71.2) | 21 (28.8) | 0.1218 |
| Positive | 3 (42.9) | 4 (57.1) | |
pT1=invasion of mucosa or submucosa; pT2=invasion of muscularis propria or subserosa.
a
Venous invasion was identified based on haematoxylin–eosin staining.