What is a brain tumor?
A brain tumor is a group, or mass, of unusual holes in your brain. Your skull, which includes your brain, is very rigid. Any increase inside such a confined space can cause difficulties. Brain cysts can be cancerous (malignant) or noncancerous (benign). When good or malignant tumors develop, they can cause the stress inside your skull to increase. This can produce brain injury, and it can be life-threatening.
Brain tumors are categorized as main or small. A first brain tumor originates in your brain. Many main brain tumors are benign. A secondary brain tumor, also known as a metastatic brain growth, occurs when tumor cells were grown to your brain from different organs, such as your lung or breast.
Types of brain tumors
Main brain tumors
Primary brain tumors originate in your brain. They can receive from you:
- brain holds
- the layers that circle your brain, which is called meninges
- tissue cells
Primary neoplasms can be benign or malignant. In adults, the most common kinds of brain tumors are gliomas and meningiomas.
Gliomas are tumors that originate from glial cells. These cells normally:
- support the structure of your inner nervous method
- provide food to your central nervous system
- clean cellular garbage
- break hair dead neurons
Gliomas can occur from different types of glial cells.
The types of tumors that start in glial cells do:
- astrocytic tumors such as astrocytomas, which found in the cerebrum
- oligodendroglial cysts, which are usually found in the frontal-temporal lobes
- glioblastomas, which found in the supportive brain network and are the most competitive type
Brain tumors that occur in the head
Acoustic neuroma (schwannoma)
Primary brain tumors occur when normal cells get errors (mutations) in their DNA. These changes enable cells to multiply and divide at increased rates and to remain living when normal cells would die. The result is a mass of irregular cells, which form a tumor.
In adults, first brain tumors are much less frequent than are secondary brain tumors, in which cancer starts outside and spreads to the brain.
Many many types of primary brain cysts exist. Each gets its title from the type of cells involved. Models include:
Gliomas. These cysts begin in the brain or spinal cord and comprise astrocytomas, ependymomas, glioblastomas, oligoastrocytomas, and oligodendrogliomas.
Meningiomas. A meningioma is a tumor that originates from the layers that circle your brain and spinal cord (meninges). Most maximum meningiomas are noncancerous.
Acoustic neuromas (schwannomas). These are harmless tumors that form on the nerves that regulate balance and hearing leading from your internal ear to your brain.
Pituitary adenomas. These are often benign tumors that develop in the pituitary gland at the bottom of the brain. These tumors can change the pituitary hormones with effects during the body.
Medulloblastomas. These are the various community cancerous brain tumors in infants. A medulloblastoma starts in the lower back part of the brain and leads to flow through the spinal fluid. These tumors are less prevalent in adults, but they do occur.
Germ cell neoplasms. Germ cell neoplasms may occur through puberty anywhere the testicles or ovaries will form. But seldom germ cell tumors affect other members of the body, such as the head.
Craniopharyngiomas. Those rare, noncancerous growths start near the brain’s pituitary gland, which covers hormones that control many bodies uses. As the craniopharyngioma slowly grows, it can affect the pituitary gland and other buildings near the head.