Brain cancers can begin from the primary brain cells, the cells that form other brain elements such as, membrane walls, blood veins, or from the growth of cancer cells that develop in our body organs and that have spread to the brain by the blood vessels.

1. Brain Cancer Prognosis

2. Introduction
A brain tumor, or tumour, is an
intracranial solid neoplasm, a
tumor within the brain or the
central spinal canal.Brain
tumors include all tumors
inside the cranium or in the
central spinal canal. They are
created by an abnormal and
uncontrolled cell division,
usually in the brain itself, but
also in lymphatic tissue, in
blood vessels, in the cranial
nerves, in the brain envelopes,
skull, pituitary gland, or pineal
gland.

3. Types of brain tumor
Glioma :
A glioma is a type of tumor
that starts in the brain or
spine. It is called a glioma
because it arises from glial
cells. The most common site
of gliomas is the
brain.Symptoms of gliomas
depend on which part of the
central nervous system is
affected. A brain glioma can
cause headaches, nausea and
vomiting, seizures, and cranial
nerve disorders as a result of
increased intracranial
pressure.

4. Meningiomas
Meningiomas are a diverse
set of tumors arising from
the meninges, the
membranous layers
surrounding the central
nervous system.They arise
from the arachnoid cap cells
of the arachnoid villi in the
meninges.These tumors are
usually benign in nature;
however, a small
percentage are malignant.

5. Pituitary Adenoma
Pituitary adenomas are
noncancerous tumors
that occur in the pituitary
gland. Pituitary adenomas
are generally divided into
three categories
dependant upon their
biological functioning:
benign adenoma, invasive
adenoma or carcinomas.