Cancer of the brain are the consequence of malignancies of cells in the brain. Brain cancers can begin from primary brain cells, the cells that form other brain components (for example, membranes, blood vessels), or from the growth of cancer cells that develop in other body organs and that have propagated to the brain by the blood vessels .
Brain tumors are all the malignancies within the neurological system and the skull. Brain tumors result from the uncontrolled and irregular cell division within the above mentioned body parts.
According to the WHO, classification of brain tumors is primarily based on the cause of cell and its behavior, from harmless, to dangerous, that is the most aggressive. The least dangerous malignancies are allocated Grade I while the most dangerous are allocated Grade IV.
The significant classification of brain tumors is reliant on the area of origin. There are two significant types of brain tumors:
i) Primary brain tumors
ii) Secondary brain tumors
PRIMARY BRAIN TUMORS:
Primary brain malignancies begin from the mind and can remain local or propagate to other areas of our bodies. These are further broken down into different types, based on the source from different brain areas.
TYPES OF PRIMARY BRAIN TUMORS:
Gliomas start from the helpful brain cells. Gliomas are of different types. They include:
a) Oligodendrogkiomas — these can affect people of all ages and mainly begin from myelin-producing cells.They are rare and mostly do not propagate.
b) Ependymomas — This type of glioma mostly has an impact on the children and the youth. Its basis is the ventricles lining.
c) Brain stem gliomas — These are found in the lower part of the brain. This part of the brain is very important as it controls the main body functions. Most of the brain control gliomas are of high quality and hence very dangerous.
d) Astrocytomas — They take place from the cells known as astrocytes. They can grow in any part of the vertebrae or the brain. In children, they create from cerebellum or the cerebrum.
2. Non Gliomas:
These occur from the non supporting cells. Various types include:
a) Pineal tumors — They grow from the pineal glands and can be easily removed from the brain. Some of them are very slow growing while others are fast growing.
b) Medulloblastomas — They start from the basic nerve cells. They also can grow in the cerebellum. They are also referred to as primitive neuroectodermal tumors.
c) Craniopharyngiomas — They originate from the pituitary glands. Most of them are harmless. In case they press hypothalamus gland because of overgrowth, various important features are lost and they become dangerous.
d) Schwannomas — They initiate from the schwan cells and generate myelin. Myelin protects auditory nerve cells.
e) Meningiomas — These are experienced by women of 30 to 50 age segment. They are harmless and begin from meninges.
SECONDARY BRAIN TUMORS:
The following cancers are the most common types that cause secondary tumors; lung, breast, kidney, colon and malignant melanoma.
Secondary brain tumors are those malignancies that create different parts of the body and get into the mind. They are metastatic and get into the veins and the lymphatic system program. They then flow through the veins or / and the lymph vessels and get filed in the mind. From here they continue splitting and become obtrusive.
Secondary brain malignancies are difficult to treat. They are also the significant cause of intracranial cavity malignancies.
The following malignancies are the most typical types that cause secondary tumors:
• Dangerous cancer malignancy
Brain cancer malignancy has a wide range of symptoms including convulsions, drowsiness, misunderstandings, and behavior changes. Not all brain malignancies are cancer, and harmless malignancies can emerge in similar signs. It is not always possible to find out the kind of brain tumor you have. This may be because the tumor is in a sensitive aspect of the mind that a physician is unable to operate on.
For more related information, please refer Mutagenesis Journals
Rekha Reddy S