Table 3.
Histology and Follow-up in totally resected benign meningiomas
| Spinal group | Matched intracranial group | Significance | |
|---|---|---|---|
| Histology | Meningotheliomatous (73%) | Meningotheliomatous (67.2%) | |
| Fibrous (7.7%) | Fibrous (17.4%) | ||
| Psammomatous (7.7%) | Transitional (10.3%) | ||
| Transitional, angiomatous, chordoid (each 3.8%) | Psammomatous (2.5%) | ||
| Microcystic (2.4%) | |||
| Angiomatous (0.8%) | |||
| Chordoid (0.4%) | |||
| High vascularity* | 18.7% | 60% | < 0.01 |
| Intratumoural calcification | 28% | 68% | < 0.01 |
| Mean Ki-67 (range) | 2.48% (0–11%, SD 2.68) | 3.6% (0–58%, SD 4.61) | 0.041 |
| PR-Status (pos.) | 46% | 52.7% | 0.261 |
| Recurrences | 2 (7.4%) | 18 (7.4%) | |
| Mean time to recurrence | 73 months (26–120) | 33.4 months (9–76) | 0.071 |
| Mean Ki-67 at recurrence | 1.0% (0–2%) | 7.0% (1–12%) | 0.007 |
* Intra-operative derived semi-quantitative score from 0 to 4 (0 dry to 4 highly vascularized)