Benign And Malignant Intracranial Tumours

Question 1

What is the WHO classification for brain tumours?

Answer 1

1.Tumours of neuroepithelial tissue
1.1Astrocytic tumours 1.2Oligodendroglial tumours 1.3Ependymal tumours 1.4Mixed gliomas 1.5Choroid plexus tumours 1.6Uncertain origin 1.7Neuronal and mixed neuronal-glial tumours 1.8Pineal tumours 1.9Embryonal tumours

2 Tumours of cranial and spinal nerves
2.1Schwannoma 2.2Neurofibroma

3. Tumours of the meninges
   3.1Meningioma 3.2Mesenchymal tumours (incl. haemangiopericytoma)

4 Lymphoma and haemopoetic tumours

5 Germ cell tumours
5.1Germinoma 5.2Teratoma 5.3Choriocarcinoma

6 Cysts and tumour-like conditions
6.1Rathke’s cleft cyst 6.2Epidermoid cyst 6.3Dermoid cyst 6.4Colloid cyst

7 Tumours of the sellar region
7.1Pituitary adenoma 7.2Craniopharyngioma

8 Local extension from regional tumours

9 Metastases