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Correlations between differentiation type and age, lymphatic metastasis (n = 63)
| Differentiation type1 | Age < 60 yr (n = 28) | Age ≥ 60 yr (n = 35) | P value (G1 vs G2-4) | No LM | LM | P value (G1 vs G2-4) |
| G1 | 9 | 13 | 0.679 | 13 | 9 | 0.250 |
| G2-4 | 19 | 22 | 18 | 23 | ||
| G2 | 10 | 12 | 10 | 12 | ||
| G3 | 7 | 10 | 7 | 10 | ||
| G4 | 2 | 0 | 1 | 1 |
G1 indicates well differentiated, G2 indicates moderately differentiated, and G3 indicates poorly differentiated G4 as undifferentiated. LM: Lymphatic metastasis.
