Group I (no blood) | Group II (minimal blood) | Group III (blood in resection cavity without compression) | Group IV (blood in resection cavity with compression) | |
Glioma | 29 | 14 (9.8 ± 3) | 3 (24 ± 14) | 1 (27) |
Meningioma | 17 | 6 (10.3 ± 2.3) | 5 (29 ± 17) | 2 (59 ± 30) |
Metastasis | 5 | 4 (11 ± 2.8) | - | - |
Other | 5 | 1 (11) | - | - |
AVM | 6 | 2 (8.5 ± 6.4) | - | - |
Cavernoma | 7 | - | - | - |
Total (n = 107) | 69 | 27 (9.5 ± 2.4) | 8 (30 ± 14) | 3 (48 ± 28) |