Predictive value of brain edema in preoperative computerized tomography scanning on the recurrence of meningioma

Available online 28 July 2012

Peer review under responsibility of Alexandria University Faculty of Medicine.

Figures & data

Table 1 The age category of patients under study.

Age category	Number of cases	Percentage
20 to less than 40	5	20
40 to less than 60	18	72
60 and more	2	8
Total	25

Table 2 The gender of patients under study.

Gender	Number of cases	Percentage
Male	11	44
Female	14	56
Total	25

Table 3 The number of years since surgery till recurrence in patients under study.

Number of years since surgery till recurrence	Number of cases	Percentage
Less than 1 year	3	12
1 year to less than 3 years	5	20
3 years to less than 6 years	13	52
6 years and more	4	16
Total	25

Table 4 The brain edema index in patients.

Brain edema index	Number of cases	Percentage
Less than 1	6	24
1 to less than 2	8	32
2 and more	11	44
Total	25

Table 5 The relationship between the preoperative brain edema index and the average years since surgery to recurrence.

Brain edema index	Average years since surgery to recurrence (years)
Less than 1	5.5
1 to less than 2	3.2
2 and more	1.1

Table 6 The relationship between the preoperative brain edema index and the number of patients with postoperative complications.

Brain edema index	Number of patients with post-operative complications	Percentage
Less than 1	2	33
1 to less than 2	4	50
2 and more	8	73

Table 7 The most common postoperative complications reported in patients under study.

Postoperative complications	Number of cases	Percentage
Weakness	10	71.4
Transient deterioration of consciousness	7	50
Seizures	4	29

Table 8 The relationship between the maximum diameter of the tumor and the surrounding brain edema.

Maximum diameter of the tumor	Cases		Number of cases with surrounding brain edema
	No.	%	No.	%
3 cm and less	5	20	3	60
More than 3 cm to less than 6 cm	12	48	11	92
6 cm and more	8	32	8	100
Total	25		22

Figure 1 Shows a preoperative axial computerized tomography scan of the brain showing a right frontal convexity meningioma with surrounding brain edema and midline shift.

Figure 2 Shows an axial CT scan of the brain, post contrast showing a right frontal convexity meningioma with surrounding brain edema.

Figure 3 Shows an axial CT scan of the brain, post contrast showing a left sphenoid ridge meningioma with surrounding brain edema.

Figure 4 Shows an axial CT scan of the brain, post contrast that shows a large recurrent right convexity meningioma with surrounding brain edema.

Figure 5 Shows an axial CT scan of the brain, post contrast showing a recurrent right sphenoid ridge meningioma with surrounding brain edema.

Table 9 The relationship between the site of the tumor and the number of cases with brain edema.

Site of the tumor	Cases		Number of cases with brain edema
	No.	%	No.	%
Sphenoid ridge	11	44	11	100
Parasagittal	6	24	6	100
Convexity	5	20	3	60
Olfactory groove	3	12	2	67
Total	25		22

Table 10 The correlation between the histopathological subtype of meningioma, preoperative brain edema index, ease of tumor excision and postoperative complications.

Histopathology of meningioma(n = 25)	Preoperative brain edema index	No.	Ease of tumor excision	No.	Postoperative complications	No.
Type I (benign) (21 patients)	Less than 1	6	Easy	11	Weakness	6
	1 to less than 2	8	Difficult	10	Transient deterioration of consciousness	4
	2 and more	7			Seizures	2
Type II (atypical) (3 patients)	Less than 1	0	Difficult	3	Weakness 3
	1 to less than 2	0			Transient deterioration	2
	2 and more	3			of consciousness
					Seizures	2
Type III (malignant) (1 patient)	Less than 1	0	Difficult	1	Weakness	1
	1 to less than 2	0			Transient deterioration of consciousness	1
	2 and more	1			Seizures	0