Table 1 Basic demographic characteristics and radiosurgical treatment parameters in 46 patients with jugular foramen schwannomas treated using gamma knife radiosurgery
Characteristics | Value |
|---|---|
Median age at GKRS, years | 49.5 (11–83) |
Sex | |
Male | 18 (39.1) |
Female | 28 (60.9) |
Laterality | |
Left | 28 (60.9) |
Right | 18 (39.1) |
Pre-existing symptoms | 27 (58.7) |
CN VII–VIIIa | 3 (11.1) |
CN IX–XII b | 16 (59.3) |
CN VII–VIII and CN IX–XII | 5 (18.5) |
Neither CN VII–VIII nor CN IX–XII c | 3 (11.1) |
Brainstem contact | 29 (63.0) |
Prior microsurgery | 15 (32.6) |
Tumour typed | |
A: Primary intracranial | 16 (34.8) |
B: Jugular foramen with intracranial extension | 3 (6.5) |
C: Primary extracranial with foraminal extension | 9 (19.6) |
D: Intra/extracranial extension (dumb-bell shaped) | 18 (39.1) |
Median tumour volume, cm3 | 3.9 (0.2–13.7) |
Median follow-up period, months | 50 (9–136) |
Median marginal dose, Gy | 13.0 (12.0–14.0) |
Median maximal dose, Gy | 26.1 (24.0–28.7) |