Table 4.
| Preoperative data | ||
|---|---|---|
| Tumor-related | ||
| Tumor size | < 4 cm 158 (53.8%) |
> 4 cm 118 (40.1%) unknown 18 (6.1%) |
| Location | ||
| 1) Hemisphere |
right 118 (40.1%) both sides 59 (20.1%) |
left 117 (39.8%) |
| 2) Origin | Falx/Parasagittal 53 (18.0%) | Convexity 59 (20.1%) |
| Sphenoid bone 63 (21.4%) | Olfactory 30 (10.2%) | |
| Petrosal bone 25 (8.5%) | Others 64 (21.8%) | |
| Incidental finding | yes 90 (30.6%) | no 204 (69.4%) |
| Tumor edema preoperative | yes 127 (43.2%) | no 167 (56.8%) |
| Circulatory disturbance of CSF** | yes 7 (2.4%) | no 287 (97.6%) |
| Preoperative embolization | yes 26 (8.8%) | no 268 (91.2%) |
| Mass effects | yes 183 (62.2%) | no 111 (37.8%) |
| 1) with midline shift | 87 (29.6%) | |
| 2) without midline shift | 98 (32.7%) | |
Tumor-related, preoperative data of 294 patients with meningioma
** CSF: cerebrospinal fluid