Stable incidence of childhood and adult glioma in the Netherlands, 1989–2003

Figures & data

Table I.  International Classification of Diseases for Oncology (ICD-O) codes for the analysed glioma groups.

Main group	Subtype	ICD-O morphology code		ICD-O grading
Astrocytic glioma	Low-grade	9400, 9410, 9411, 9420	astrocytoma	1, 2
		9421	pilocytic astrocytoma	1, 2, 9
		9424	pleomorphic xanthoastrocytoma	1, 2
	High-grade	9400, 9410, 9411, 9420	astrocytoma	3, 4
		9401	anaplastic astrocytoma
		9424	pleomorphic xanthoastrocytoma
		9440, 9441, 9442, 9481	glioblastoma	3, 4
	Grade unknown	9400, 9410, 9411, 9420	astrocytoma	9
		9424	pleomorphic xanthoastrocytoma	9
Oligodendroglial/mixed glioma		9382	mixed glioma (oligoastrocytoma)	1–4, 9
		9450	oligodendroglioma	1–4, 9
		9451	anaplastic oligodendroglioma
Ependymal glioma		9391	ependymoma	1–4, 9
		9392	anaplastic ependymoma
uncertain histology		−9380	no microscopic verification glioma not specified	1–4, 9

Figure 1.  Incidence of all glioma according to gender, European Standardised Rates, 3-year moving average, with Estimated Annual Percentage Change (EAPC).

Figure 2.  Incidence of all glioma according to gender and age, European Standardised Rates, 3-year moving average, with Estimated Annual Percentage Change (EAPC).

Table II.  Total number of registered glioma patients in the Netherlands during the period 1989–2003, for diagnosis groups and age categories.

	Number of patients, 1989–2003
Diagnosis and age (years)	Males	Females
Astrocytic glioma, low-grade
0–14	187	193
15–44	467	332
45–64	220	135
65 +	71	49
Astrocytic glioma, high-grade
0–14	30	28
15–44	559	367
45–64	1533	985
65 +	1015	772
Astrocytic glioma, grade unknown
0–14	23	21
15–44	131	83
45–64	95	79
65 +	73	68
Oligodendroglial/mixed glioma
0–14	23	23
15–44	346	265
45–64	300	249
65 +	105	83
Ependymal glioma
0–14	74	47
15–44	61	54
45–64	65	38
65 +	24	17
Uncertain histology^a
0–14	64	48
15–44	145	106
45–64	382	259
65 +	721	797
Total
0–14	401	360
15–44	1709	1207
45–64	2595	1745
65 +	2009	1786
All ages	6714	5098

^aThis category comprises clinically diagnosed tumours without histopathological confirmation (87%) and glioma not otherwise specified (13%).

Figure 3.  Incidence of astrocytic glioma and glioma of uncertain histology according to gender, European Standardised Rates, 3-year moving average, with Estimated Annual Percentage Change (EAPC).

Figure 4.  Incidence of astrocytic glioma and glioma of uncertain histology according to gender and age, European Standardised Rates, 3-year moving average, with Estimated Annual Percentage Change (EAPC).

Figure 5.  Incidence of oligodendroglial/mixed glioma and ependymal glioma according to gender and age, European Standardised Rates, 3-year moving average, with Estimated Annual Percentage Change (EAPC).