Table 6. Risk factors for local recurrence (n = 115).
| Local recurrence (+) (n = 8) |
Local recurrence (–) (n = 107) |
P value | |
| Location Oropharynx Hypopharynx |
2 6 |
22 85 |
n.s. |
| Tumor size, mm < 20 ≥ 20 |
5 3 |
86 21 |
n.s. |
| Procedure ESD EMR |
0 8 |
22 85 |
n.s. |
| Number of resections En bloc Piecemeal |
2 6 |
76 31 |
n.s. |
| Depth Epithelium Subepithelium |
1 7 |
54 53 |
n.s. |
| Lymphovascular invasion Negative and inconclusive Positive |
8 0 |
105 2 |
n.s. |
| Horizontal margin Negative Positive and inconclusive |
0 8 |
39 68 |
< 0.05 |
| Vertical margin Negative Positive and inconclusive |
7 1 |
101 6 |
n.s. |
ESD, endoscopic submucosal dissection; EMR, endoscopic mucosal resection; n.s., not significant.