Table 1.

Characteristics of population.

Histological Diagnosis	WHO Grade	Number
Glioblastoma	IV	33
Anaplastic astrocytoma	III	6
Diffuse astrocytoma	II	5
Oligodendroglioma	II	6
Pilocytic astrocytoma	I	3
Ganglioglioma	I	1
Meningioma	I	2