Table 2. Characteristics of Patients Who Underwent Bilateral Neck Dissection.
| Characteristic | Patient Groupa | |
|---|---|---|
| All (N = 89) | With Contralateral cN0 Neck Finding (n = 70)b | |
| Sex | ||
| Male | 81 (91.0) | 63 (90.0) |
| Female | 8 (9.0) | 7 (10.0) |
| Age, mean (SD), y | 60 (9) | 60 (9) |
| Smoking | ||
| Never | 37 (41.6) | 33 (47.1) |
| Past | 37 (41.6) | 28 (40.0) |
| Current | 15 (16.9) | 9 (12.9) |
| Duration, mean (SD), pack-years | 15 (22) | 11 (20) |
| ACE-27 findings | ||
| None/mild | 68 (76.4) | 54 (77.1) |
| Moderate/severe | 21 (23.6) | 16 (22.9) |
| Tumor location | ||
| Lateralized | 42 (47.2) | 39 (54.3) |
| Crosses midline | 41 (46.1) | 26 (37.1) |
| Distance from midline, mean (SD), cm | 0.41 (0.39) | 0.45 (0.39) |
| Pathologic T stage | ||
| T1-T2 | 66 (74.2) | 57 (81.4) |
| T3-T4 | 23 (25.8) | 13 (18.6) |
| Pathologic N stage | ||
| N0 | 4 (4.5) | 4 (5.7) |
| N1 | 63 (70.8) | 55 (78.6) |
| N2 | 22 (24.7) | 11 (15.7) |
| Margin | ||
| Negative | 87 (97.8) | 68 (97.1) |
| Positive | 2 (2.2) | 2 (2.9) |
| LVI | ||
| No | 50 (56.2) | 44 (62.9) |
| Yes | 38 (42.7) | 25 (35.7) |
| Unknown | 1 (1.1) | 1 (1.4) |
| PNI | ||
| No | 79 (88.8) | 64 (91.4) |
| Yes | 9 (10.1) | 5 (7.1) |
| Unknown | 1 (1.1) | 1 (1.4) |
| Adjuvant therapy | ||
| None | 17 (19.1) | 16 (22.9) |
| Radiotherapy | 36 (40.4) | 33 (47.1) |
| Chemoradiotherapy | 35 (39.3) | 21 (30.0) |
| Unknown | 1 (1.1) | 0 |
| Recurrence | ||
| None | 79 (88.8) | 65 (92.9) |
| Local | 3 (3.4) | 2 (2.9) |
| Locoregional | 1 (1.1) | 0 |
| Distant | 6 (6.7) | 3 (4.3) |
Abbreviations: ACE-27, Adult Comorbidity Evaluation–27; ECS, extracapsular lymph node spread; LVI, lymphovascular invasion; PNI, perineural invasion.
a
Unless otherwise indicated, data are expressed as number (percentage) of patients. Percentages have been rounded and may not total 100.
b
Refers to patients who on physical examination and imaging findings had no evidence of nodal disease in the contralateral neck.