Table 3 Methods for verification of 454 childhood CNS tumours in Denmark in the period 1985–1996

From: Increasing incidence of childhood tumours of the central nervous system in Denmark, 1980–1996

 

CT

MRI

Others a

Tumour definition

%

n

%

n

%

n

All CNS tumours

78

355

14

62

8

37

Tumour morphology

 Astrocytoma

79

147

13

24

8

14

Pilocytic astrocytoma

89

47

6

3

6

3

Other astrocytomasb

76

100

16

21

8

11

 Primitive neuroectodermal tumours

89

73

5

4

6

5

 Ependymoma

77

30

13

5

10

4

 Other glioma

57

8

14

2

29

4

 Others

72

97

20

27

7

10

Not histologically verified

71

50

26

18

3

2

Tumour topography

 Cerebellum

89

116

5

6

6

8

 Cerebrum

77

103

12

16

11

15

 Brain stem

71

40

23

13

5

3

 Other locations

72

96

20

27

8

11

  1. CT, computed tomography; CNS, central nervous system; MRI, magnetic resonance imaging.
  2. aIncluding histological investigation (n=11), autopsy (n=3), myelography (n=3) and ultrasound (n=1), more than one method verified the tumour on the same day (n=13) and unknown owing to missing results from the first scanning in the medical records (n=6).
  3. bIncluding astrocytomas, not otherwise specified.
Back to article page