Appendix 1

APPENDIX 1 (Modified from the WHO Classification of Ref. 1)

1 Neuroepithelial (Neuroectodermal)

1.1 Astrocytoma

1.2 Oligodendroglioma

1.3 Ependymoma

1.4 Mixed Gliomas

1.5 Choroid Plexus Tumors

1.6 Uncertain Origin

1.7 Neuronal and Mixed Neuronal/Glial

1.8 Pineal Parenchymal

1.9 Embryonal

2 Tumors of Nerve Sheath

2.1 Schwannoma

2.2 Neurofibroma

2.3 Malignant (peripheral) nerve sheath tumor

3 Tumors of the Meninges

3.1 Meningioma

3.2 Mesenchymal (not meningothelial)

3.2.1-4 Benign

3.2.5-10 Malignant

3.2.5 Hemangiopericytoma

3.3 Primary Melanocytic Lesions

4 Lymphoma

5 Germ Cell Tumors

5.1 Germinoma

6 Cysts and Tumor-like Lesions

6.1 Rathke cleft cyst

6.2 Epidermoid cyst

6.3 Dermoid cyst

6.4 Colloid cyst

7 Tumors of the Sellar Region

7.1 Pituitary Adenoma

7.3 Craniopharyngioma

8 Local Extension of Regional Tumors

9 Metastatic

10 Unclassified

1	Neuroepithelial (Neuroectodermal)
	1.1	Astrocytoma
	1.2	Oligodendroglioma
	1.3	Ependymoma
	1.4	Mixed Gliomas
	1.5	Choroid Plexus Tumors
	1.6	Uncertain Origin
	1.7	Neuronal and Mixed Neuronal/Glial
	1.8	Pineal Parenchymal
	1.9	Embryonal

2	Tumors of Nerve Sheath
	2.1	Schwannoma
	2.2	Neurofibroma
	2.3	Malignant (peripheral) nerve sheath tumor

3	Tumors of the Meninges
	3.1	Meningioma
	3.2	Mesenchymal (not meningothelial)
		3.2.1-4	Benign
		3.2.5-10	Malignant
		3.2.5		Hemangiopericytoma
	3.3	Primary Melanocytic Lesions

4	Lymphoma

5	Germ Cell Tumors
	5.1	Germinoma

6	Cysts and Tumor-like Lesions
	6.1	Rathke cleft cyst
	6.2	Epidermoid cyst
	6.3	Dermoid cyst
	6.4	Colloid cyst

7	Tumors of the Sellar Region
	7.1	Pituitary Adenoma
	7.3	Craniopharyngioma

8	Local Extension of Regional Tumors

9	Metastatic

10	Unclassified