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Patient characteristics.
| Characteristic | No. of patients | % |
|---|---|---|
| Age at diagnosis, median (range), y | 72.6 y (69.8–75.8 y) | |
| Sex | ||
| Male | 18 | 85.7 |
| Female | 3 | 14.3 |
| Smoking | ||
| Never | 6 | 28.6 |
| Unknown pack-years | 2 | 9.5 |
| <10 pack-years | 1 | 4.8 |
| >10 pack-years | 12 | 57.1 |
| Mean pack-year (range) | 35.05 (0–180) | |
| Primary site | ||
| Base of tongue | 14 | 66.7 |
| Tonsil | 5 | 23.8 |
| Pharyngeal wall | 1 | 4.8 |
| Base of tongue and tonsil | 1 | 4.8 |
