Table 1a.
Unknown primary tumor characteristics.
| Parameter | Number of patients (%) | Mean ± SD (Range) |
|---|---|---|
| Tumor size (mm) | 18 | 8.4 ± 4.9 (2–19) |
| Therapeutic tumor excision at diagnostic lingual tonsillectomy* | 14 of 18 (78%) | |
| pT0 | 9 of 27 (33%) | |
| pT1 | 18 of 27 (67%) | |
| pN1 | 25 of 27 (93%) | |
| pN2 | 2 of 27 (7%) | |
| ENE | 8 of 27 (30%) | |
| ENE < 2 mm | 6 of 27 (22%) | |
| ENE > 2 mm | 2 of 27 (7%) | |
| PNI | 2 of 27 (7%) | |
| LVI | 4 of 27 (15%) | |
| PNI + LVI | 1 of 27 (4%) |
ENE = extra-nodal extension, PNI = peri-neural invasion, LVI = lymphovascular invasion.
*
4 patients with incomplete excision also had ENE on pathologic nodal assessment and were not taken for revision due to recommendation for chemoradiation.