Table 1. Baseline characteristics of 23 patients with large skull base meningiomas treated with fractionated Gamma knife radiosurgery.
| Parameters | Values |
|---|---|
| Mean age, range (years) | 65 (54~80) |
| Gender: male/female | 6 (26%)/17 (74%) |
| Pre-FGKS clinical manifestations | |
| Headache | 5 (22%) |
| Dizziness | 4 (17%) |
| Visual field defect | 3 (13%) |
| Seizure | 1 (4%) |
| Cranial nerve deficit | |
| III/IV/VI | 1 (4%) |
| V | 2 (9%) |
| VII | 0 |
| VIII | 1 (4%) |
| IX/X | 0 |
| XI | 0 |
| XII | 0 |
| Weakness | 1 (4%) |
| Cognitive impairment | 0 |
| Location | |
| Middle | |
| Parasellar | 2 (9%) |
| Sphenoid ridge | 4 (17%) |
| Cavernous sinus | 5 (22%) |
| Posterior | |
| Cerebellopontine angle | 9 (39%) |
| Petroclival | 2 (9%) |
| Tentorial | 1 (4%) |
| Tumor volume | |
| Mean±SD (cm3) | 21.63±15.46 |
| Range (cm3) | 10.09~71.42 |
| 10~20 cm3 | 15 (65%) |
| 20~30 cm3 | 5 (22%) |
| 30~40 cm3 | 1 (4%) |
| ≥40 cm3 | 2 (9%) |
| Maximum tumor diameter (mm) | |
| Mean±SD | 31.31±8.38 |
| Range | 13.43~52.79 |
| Mean clinical follow-up duration, range (months) | 38 (17~78) |