A brain tumor Symptoms can be defined as a cluster or growth of abnormal cells in the brain. There are different types of brain tumors, some of which are benign or non-cancerous, and some of which are malignant or cancerous.
These tumors can be primary brain tumors that start in the human brain, or secondary brain tumors that start in other parts of the body and spread to the brain.
What is a Brain Tumor?
Normal cells grow in a controlled manner as old cells are replaced by new cells or damaged cells. For reasons that are not fully understood, tumor cells reproduce uncontrollably.
A primary brain tumor is an abnormal growth that starts in the brain and usually does not spread to other parts of the body. Primary brain tumors can be benign or malignant.
Benign brain tumors grow slowly, have distinct borders and rarely spread. Although her cells are harmless, malignant tumors can be fatal if they occur in a critical area.
Malignant brain tumors grow rapidly, have irregular borders and spread to adjacent brain regions. Although often called brain cancer, malignant brain tumors do not fit the definition of cancer because they do not spread to areas outside the brain and spinal cord.
Metastatic (secondary) brain tumors start as cancer elsewhere in the body and spread to the brain. They form when cancer cells are carried in the bloodstream. Cancers that have spread to the brain include the lungs and breast.
Brain tumors, whether malignant, malignant, or metastatic, can all be fatal. When the brain is trapped inside the bony skull, it cannot expand to accommodate the growing mass.
As a result, the tumor compresses and displaces normal brain tissue. Some brain tumors cause a blockage of cerebrospinal fluid (CSF) that flows around the brain.
Types of Brain Tumors
- Pilocytic Astrocytoma (grade I)
- Diffuse Astrocytoma (grade II)
- Anaplastic Astrocytoma (grade III)
- Glioblastoma Multiforme (grade IV)
- Oligodendroglioma (grade II)
- Anaplastic Oligodendroglioma (grade III)
- Ependymoma (grade II)
- Anaplastic Ependymoma (grade III)
The type of cell. It is related to tumor stem cells. For example, neurons and accessory cells (glial and Schwann cells) give rise to tumors. About half of all primary brain tumors are formed from glial cells (gliomas). There are several types of gliomas because glial cells are different.
degree It refers to how tumor cells look under the microscope and indicates aggressiveness (eg, low grade means less invasive, and high grade means less aggressive) (Table 1) Tumors often contain a mixture of cell types and can change as well. to grow Differentiated and anaplastic are terms used to describe how similar or abnormal tumor cells are compared to normal cells.