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)