The correct term - a brain tumor, because in the brain is no epithelial tissue from which you can develop cancer. Brain tumors are relatively rare: they account for about one and a half per cent of all malignant tumors.

For tumors of the nervous system characterized by sexual dimorphism: medulloblastoma and germinal tumors are more common in men, and meningiomas and neurinomas - with women.

Types of brain tumors

• Neuroepithelial tumors (ependymoma, gliomas, oligodendrogliomas).
• Cladding tumor (meningioma).
• Metastatic tumors.
• Pituitary tumor (adenoma pituitary gland).
• Tumors of the cranial nerves (neuromas of the auditory nerve, etc.).
• Vascular tumors.
• Dizembriogenenticheskie.

The concept of malignancy in relation to brain tumors.

By the nature of the clinical course - all malignant brain tumors, tk lead to death due to hypertension and dislocation of the brain. There is a rapidly growing tumors (gliomas, metastases, glioblastoma, carcinoma, etc.) and relatively slow-growing (meningiomas, adenomas, etc.). This division of brain tumors, rather arbitrarily, because of considerable importance and place of tumor growth.

By histological structure - depending on the histological features identified microscopically.

Gliomas account for 60% of all primary brain tumors. Malignant gliomas - glioblastoma multiforme and anaplastic gliomas (anaplastic astrocytoma, anaplastic oligodendrogliomas and anaplastic oligoastrocytomas) are the most common infiltrative primary brain tumors. Histologically they were divided into four degrees of malignancy, different versions of which occur with varying frequency and differ in their prognosis. Glioblastoma multiforme is the most common and has a very poor prognosis. Average life expectancy after diagnosis is 12 months.