Table 1.
Demographics of 1,107 patients with meningiomas.
| Characteristics | Number (%) |
|---|---|
| Age | |
| Range | 13–85 |
| Median | 56 |
| Sex | |
| Male | 322 (29.1) |
| Female | 785 (70.9) |
| WHO grades | |
| I | 993 (89.7) |
| II | 101 (9.1) |
| III | 13 (1.2) |
| Locations | |
| Convexity | 230 (20.8) |
| Parasagittal sinus | 179 (16.1) |
| Falx | 126 (11.4) |
| Tentorium | 94 (8.5) |
| Cerebellar convexity | 10 (0.9) |
| Cerebellopontine angle | 86 (7.7) |
| Sphenoid wing | 109 (9.8) |
| Parasellar/cavernous sinus | 32 (2.9) |
| Tuberculum sellae/planum sphenoidale/anterior clinoid process | 84 (7.6) |
| Middle fossa | 14 (1.3) |
| Olfactory groove | 66 (6.0) |
| Clival-petroclival | 21 (1.9) |
| Foramen magnum | 3 (0.3) |
| Intraventricular | 22 (2.0) |
| Others (multiple/orbital/jugular foramen) | 31 (2.8) |
| Extent of resection* | |
| Gross total resection | 945 (90.0) |
| Subtotal resection | 105 (10.0) |
| Recurrence rates# | |
| I | 28 (2.8) |
| II | 8 (7.9) |
| III | 7 (53.8) |
*
The results of EOR were lost in 57 patients; thus, the EOR was evaluated in 1,050 patients.
#
The recurrence rates were calculated based on the number of patients of the corresponding WHO grade.