Table 1. Patient Characteristics.
EBRT = external beam radiation therapy, SRS = stereotactic radiosurgery, KPS = Karnofsky performance status.
| Characteristics | Value (%) |
| Patients | N=18 |
| Median age (yrs) | 47.8 |
| Median KPS | 90 |
| Sex | |
| Male | 8 (44) |
| Female | 10 (56) |
| Primary head and neck tumor site | |
| Nasopharynx | 6 (33) |
| Sinonasal | 3 (17) |
| Parotid | 3 (17) |
| Hard palate | 2 (11) |
| Unknown primary | 2 (11) |
| Buccal mucosa | 1 (6) |
| Infratemporal fossa | 1 (6) |
| Histology | |
| Squamous cell carcinoma | 5 (28) |
| Adenocarcinoma | 2 (11) |
| Adenoid cystic carcinoma | 7 (39) |
| Undifferentiated | 4 (22) |
| Primary treatment | |
| Surgery + concurrent chemotherapy and EBRT | 2 (11) |
| Concurrent chemotherapy and EBRT | 5 (28) |
| Surgery + EBRT | 11 (61) |
| Recurrent treatment site | |
| Dura | 2 (11) |
| Nasopharynx | 3 (17) |
| Skull base | 7 (39) |
| Sinonasal | 2 (11) |
| Cavernous sinus | 4 (22) |
| SRS dose (median) | 13.3 Gy |
| Time from EBRT to SRS (median months) | 23.7 |