Table 3.

Distribution of primary CNS tumors in the cohort. The aggrupation is based on the International Classification of Childhood Cancer third version.

International Classification of Childhood Cancer			Total
			n	%
III.a.	Ependymomas and choroid plexus tumors
	III.a.1.	Ependymomas	106	11
	III.a.2.	Choroid plexus tumors	13	1
III.b.	Astrocytomas		357	36
III.c.	Intracranial and intraspinal embryonal tumors
	III.c.1.	Medulloblastomas	201	20
	III.c.2.	Primitive neuroectodermal tumors	31	3
	III.c.3.	Medulloepithelioma	2
	III.c.4.	Atypical teratoid/rhabdoid tumors	16	2
III.d.	Other gliomas
	III.d.1.	Oligodendrogliomas	21	2
	III.d.2.	Mixed and unspecified gliomas	99	10
	III.d.3.	Neuroepithelial glial tumors of uncertain origin	20	2
III.e.	Other specified intracranial and intraspinal neoplasms
	III.e.1.	Pituitary adenomas and carcinomas	2	0
	III.e.2.	Tumours of the sellar region (craniopharyngiomas)	0	0
	III.e.3.	Pineal parenchymal tumors	22	2
	III.e.4.	Neuronal and mixed neuronal-glial tumors	41	4
	III.e.5.	Meningiomas	9	1
III.f.	Unspecified intracranial and intraspinal neoplasms
	---	Intraespinal neoplasms	26	3
	---	Unspecified intracranial	23	2
		Total	989	100