Table 2 Distribution of histological subtypes of childhood brain tumour and age at time for diagnosis

From: Prenatal X-ray exposure and childhood brain tumours: a population-based case–control study on tumour subtypes

   

Age (years)

 

N

%

25th percentile

Median

75th percentile

Astrocytoma low grade

191

37.3

4

8

12

Astrocytoma high grade

61

11.9

6

9

11

PNET

105

20.5

3

6

10

Ependymoma

44

8.6

1

4

9.5

Germ cell tumour

17

3.3

8

9

12

Othersa

94

18.4

4

7

11

Total

512

100.0

4

8

11

  1. PNET=primitive neuroectodermal tumour.
  2. Age is presented as median age together with 25th and 75th percentiles.
  3. aTwo neurofibromas/hamartomas, seven meningiomas, one malignant meningioma, eight haemangioma, two hemangioblastoma, one lipoma, 23 craniopharyngioma, 32 tumours not specified as malignant or benign, one suspected malignant tumour, 17 tumours without pathohistological diagnosis.
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