Posts Tagged ‘Is there any reason known to produce brain tumors?’
Causes of Brain Tumors
What kind of brain tumors are there?
Brain tumors can be primary tumors or metastatic tumors. Primary tumors originate from the very cells that make up the various brain structures and metastatic tumors are tumors that have spread to the brain from another location extracerebral.
The latter are 10 times more common than primary brain tumors is estimated that about 20-40% of cancer patients develop brain metastases.
Primary brain tumors are highly variable group of tumors with very different origin, prognosis and treatment.
They can range from very rare tumors such as pilocytic astrocytoma curable with surgery alone to glioblastoma multiforme virtually incurable despite treated with surgery, radiotherapy and chemotherapy.
What primary brain tumors are most common?
The primary tumor is the most common benign meningioma (tumor originated in the brain coverings called meninges). In adults, the most common primary malignant tumors are gliomas or astrocytomas. Gliomas arise from astrocytes or glial cells of the brain that form, together with the vascular network, the support of neurons. In turn, astrocytomas as less aggressive or more are classified as grade I, II, III (anaplastic astrocytoma) and IV (glioblastoma multiforme).