Table: Characteristics of the 46 patients
Characteristic	Value
Sex (number of patients)
Male	21
Female	25
Age (years)
Mean	52
Range	18-78
Side of tumor
Left	25
Right	21
Location of tumor
Frontal	27
Parietal	12
Temporal	6
Occipital	1
Surgery
First operation	39
Repeat craniotomy	7
Pathology
High-grade glioma	11
Low-grade glioma	8
Metastasis	21
Other	6
Extent of resection
Gross total	27
Subtotal	14
Partial	5