Cancer is basically a result of abnormal growth of cells in the brain. Brain cancer can arise due to different reasons. These reasons can be primary brain cells, cells that form other brain components for example membrane if these cells are cancerious these can be a cause of brain cancer, also cells that come from other organs if they have cancer cells then through blood stream they can cause cancer.
Before going towards the details, it is necessary to understand there is a slight difference between tumors and brain cancer. Not all brain tumors are cancerious. Cancer is a term reserved for malignant tumors and malignant tumors are those which grow and spread aggressively, overpower healthy cells by taking their space, blood and nutrients. Tumors that do not grow aggressively called benign. Benign tumor is less serious so is called a tumor and it progresses at slower rate. Almost all brain tumors do not spread to other parts of the body.
There is another term which belongs to brain disease category but is not related to brain cancer, but sometimes people confuse brain aneurysms with brain tumors, but it is different these areas in brain arteries or vein which are abnormally weak.
Now after defining the scope of brain cancers we shall see that what are the types of brain cancers?
There are two categories of brain cancers. First category involves Primary brain tumors. The most common primary brain tumors are gliomas, meningiomas, pituitary adenomas, vestibular glioma is an expensive one, since it includes numerous subtypes, including astrocytomas, oligodendrogliomas, ependymomas, and choroid plexus papillomas. These primary tumors are named after the part of the brain or the type of brain cell from which they arise.
The National Cancer institute (NCI) uses a grading system to classify tumors. The NCI lists the following grades:
GRADE I The tissue is benign. The cells look nearly like normal brain cells, and cell growth is slow.
GRADE II The tissue is malignant. The cells look less like normal cells than do the cells in a grade I tumor.
GRADE III The malignant tissue has cells that look very different from normal cells, grow actively and termed as anaplastic.
GRADE IV Malignant tissue, most abnormal, grow faster.
After Primary Brain tumors there is another type of brain cancer that is Metastatic Brain tumors. These types of tumors are made of cancerious cells which spread through blood stream. The most common cancers that spread to the brain are those arising from cancers that originate from lung, breast and kidney. The cells spread to the brain from another tumor in a process called metastasis. The process metastasis occurs when cancer cells leave the primary cancer tissue and enter either the lymphatic system to reach the blood or the blood stream directly.
These metastatic brain tumors are more common than primary brain tumors.
Until now we have gain knowledge about:
Primary Brain tumors which are caused by cancer of brain cells.
Metastatic Brain Cancer which is caused by another part of the body has spread to brain.
Benign Brain tumors a broader category which don’t contain cancer cells may include Metastatic.
Malignant Brain tumors a broader category which contain cancer cells and are life threatening. The tumors are like plant may put out roots that grow into healthy brain tissue. However if a malignant tumor remains compact and does not have roots, it is said to be encapsulated.
These were the broader categories if we go in more detail we shall find types as per the disease from which they arise.
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Before going towards the details, it is necessary to understand there is a slight difference between tumors and brain cancer. Not all brain tumors are cancerious. Cancer is a term reserved for malignant tumors and malignant tumors are those which grow and spread aggressively, overpower healthy cells by taking their space, blood and nutrients. Tumors that do not grow aggressively called benign. Benign tumor is less serious so is called a tumor and it progresses at slower rate. Almost all brain tumors do not spread to other parts of the body.
There is another term which belongs to brain disease category but is not related to brain cancer, but sometimes people confuse brain aneurysms with brain tumors, but it is different these areas in brain arteries or vein which are abnormally weak.
Now after defining the scope of brain cancers we shall see that what are the types of brain cancers?
There are two categories of brain cancers. First category involves Primary brain tumors. The most common primary brain tumors are gliomas, meningiomas, pituitary adenomas, vestibular glioma is an expensive one, since it includes numerous subtypes, including astrocytomas, oligodendrogliomas, ependymomas, and choroid plexus papillomas. These primary tumors are named after the part of the brain or the type of brain cell from which they arise.
The National Cancer institute (NCI) uses a grading system to classify tumors. The NCI lists the following grades:
GRADE I The tissue is benign. The cells look nearly like normal brain cells, and cell growth is slow.
GRADE II The tissue is malignant. The cells look less like normal cells than do the cells in a grade I tumor.
GRADE III The malignant tissue has cells that look very different from normal cells, grow actively and termed as anaplastic.
GRADE IV Malignant tissue, most abnormal, grow faster.
After Primary Brain tumors there is another type of brain cancer that is Metastatic Brain tumors. These types of tumors are made of cancerious cells which spread through blood stream. The most common cancers that spread to the brain are those arising from cancers that originate from lung, breast and kidney. The cells spread to the brain from another tumor in a process called metastasis. The process metastasis occurs when cancer cells leave the primary cancer tissue and enter either the lymphatic system to reach the blood or the blood stream directly.
These metastatic brain tumors are more common than primary brain tumors.
Until now we have gain knowledge about:
Primary Brain tumors which are caused by cancer of brain cells.
Metastatic Brain Cancer which is caused by another part of the body has spread to brain.
Benign Brain tumors a broader category which don’t contain cancer cells may include Metastatic.
Malignant Brain tumors a broader category which contain cancer cells and are life threatening. The tumors are like plant may put out roots that grow into healthy brain tissue. However if a malignant tumor remains compact and does not have roots, it is said to be encapsulated.
These were the broader categories if we go in more detail we shall find types as per the disease from which they arise.
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