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Relationship between lymphatic metastasis and histological type
| Histological type (adenocarcinoma) | n | Lymphatic metastasis (-) | Lymphatic metastasis (+) | Positive rate (%) |
| Well and moderately differentiated | 160 | 109 | 51 | 31.8% |
| Poorly differentiated and mucinous | 51 | 16 | 35 | 68.6%d |
P < 0.01, vs. well and moderately differentiated type.
