Clinicopathologic variables
| Feature . | n . | (%) . |
|---|---|---|
| Histology | ||
| ADC | 90 | (68) |
| SQCC | 25 | (19) |
| LCUC | 18 | (13) |
| Tumor differentiation | ||
| Well differentiated (low grade) | 24 | (18) |
| Moderately differentiated (intermediate grade) | 46 | (35) |
| Poorly differentiated (high grade) | 63 | (47) |
| Size | ||
| mean (standard deviation) | 3.91 | (1.84) cm |
| Tumor stage | ||
| T1 | 30 | (23) |
| T2 | 98 | (74) |
| T3 | 4 | (3) |
| Node stage | ||
| N0 | 78 | (59) |
| N1 | 44 | (33) |
| N2 | 8 | (6) |
| N3 | 2 | (2) |
| p27 | ||
| High (positive staining in >50% of nuclei) | 19 | (14) |
| Low (positive staining in <50% of nuclei) | 114 | (86) |
| K-ras | ||
| Mutation | 30 | (23) |
| No mutation | 102 | (77) |
| Feature . | n . | (%) . |
|---|---|---|
| Histology | ||
| ADC | 90 | (68) |
| SQCC | 25 | (19) |
| LCUC | 18 | (13) |
| Tumor differentiation | ||
| Well differentiated (low grade) | 24 | (18) |
| Moderately differentiated (intermediate grade) | 46 | (35) |
| Poorly differentiated (high grade) | 63 | (47) |
| Size | ||
| mean (standard deviation) | 3.91 | (1.84) cm |
| Tumor stage | ||
| T1 | 30 | (23) |
| T2 | 98 | (74) |
| T3 | 4 | (3) |
| Node stage | ||
| N0 | 78 | (59) |
| N1 | 44 | (33) |
| N2 | 8 | (6) |
| N3 | 2 | (2) |
| p27 | ||
| High (positive staining in >50% of nuclei) | 19 | (14) |
| Low (positive staining in <50% of nuclei) | 114 | (86) |
| K-ras | ||
| Mutation | 30 | (23) |
| No mutation | 102 | (77) |