Table 1. Summarization of radiological and histopathological data of patients with primary diagnosed and recurrent meningioma.
| Variable | Available data (N, n%) | Frequency (N, n%) |
|---|---|---|
| Tumour location | 617 (100%) | |
| Convexity | 215 (35%) | |
| Falx/parasagittal | 85 (14%) | |
| Skull base | 271 (44%) | |
| Posterior fossa | 41 (7%) | |
| Intraventricular | 5 (1%) | |
| Tumour/edema volume | ||
| Tumour volume (median, range) | 554 (90%) | 12.71 ccm (0.02-356.94 ccm) |
| Edema volume (median, range) | 529 (86%) | 0.00 ccm (0.00-739.28 ccm) |
| Intensity on T2-weighted MRI | 540 (88%) | |
| Hypointense | 294 (48%) | |
| Isointense | 19 (3%) | |
| Hyperintense | 227 (37%) | |
| Further radiological criteria | ||
| Archnoid layer disrupted/absent | 531 (86%) | 296 (48%) |
| Heterogeneous T1 contrast enhancement | 617 (100%) | 262 (43%) |
| Tumour shape irregular | 558 (90%) | 225 (37%) |
| Tumour calcifications | 554 (88%) | 115 (19%) |
| Capsular contrast enhancement | 523 (85%) | 160 (26%) |
| WHO Grade | 617 (100%) | |
| WHO grade I | 557 (90%) | |
| WHO grade II | 57 (9%) | |
| WHO grade III | 3 (1%) | |
| Brain invasion | 617 (100%) | |
| Present | 24 (4%) |
The left column delineates the rate of available data, the right column shows the frequency of the corresponding variable and the median/range of the tumour and PTBE volumes.