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Multiple primary cancers of the case with FOM SCC.
| Anterior type | Posterior type | p value | |
|---|---|---|---|
| (N = 32) | (N = 30) | ||
| The number of additional primary cancer, N | |||
| 1 | 13 | 4 | |
| 2 | 4 | 0 | |
| 3 | 0 | 1 | |
| Total, N (%) | 17 (53.1) | 5 (16.7) | <0.01 |
FOM, floor of the mouth; SCC, squamous cell carcinoma.
