The body normally forms new cells only when they are needed to replace old or damaged ones. If something happens to disturb this controlled process, abnormal or excessive cells are produced. When this occurs a tumor is developed. This is known as cancer. When a tumor is developed on the brain, it is called a brain tumor or brain cancer. Brain tumors can be benign or malignant (benign being not cancerous and malignant being cancerous).
Both types can be deadly when dealing with the brain. Benign brain tumors consist of very slow growing cells. They have distinct borders and rarely spread to other locations. When viewed under a microscope, the cells of a benign tumor have an almost normal appearance. Even though these tumors sound harmless they can be life-threatening when located in such a vital area.
Since the skull is unable to expand when the tumor grows it puts pressure on the brain. This results in damaged brain tissues and if left untreated a person could die. A malignant tumor is a tumor that could potentially invade and destroy important tissues and cells. They can also spread to other parts of the body (metastasize). Brain tumors can initially start in the brain. They can also spread to other parts of the body from the brain but this rarely happens.
Some tumors may be worse than others. Tumor staging is used to determine the extent of cancer. The stage indicates if the cancer has spread and how far. The stages are listed below: T = Primary tumor size / extent T 0: Primary tumor not present T 1, T 2, T 3, T 4 The higher the number, the larger the size / extent of the tumor. N = Regional lymph node involvement N 0: No lymph node involvement N 1, N 2, N 3 The higher the number, the more lymph node involvement. M = Distant metastasis M 0: no metastasis M 1: Metastasis present The caus of brain cancer is unknown.
It is likely they are caused by many factors. Some of these factors are genetic damage, inheritance, electromagnetic fields, weak immune system, viruses, injury, diet, chemicals, hormones, environmental factors, and occupational factors. The most common and often first symptoms of brain tumors are headaches and seizures. Later symptoms include nausea, vomiting, fever, change in pulse, and trouble breathing. Mental changes may also occur such as difficulty in communication and speech. In general symptoms greatly depend on the location of the tumor.
For example if the tumor is on the occipital lobe, you would have problems with your vision. Treatment of a tumor depends on its location and type, but surgical removal of the tumor if the primary treatment for cancer. Some tumors can be removed without harm to any part of the brain while others are in areas that make surgical removal impossible. Most tumors are treated with a combination of chemotherapy, radiation therapy, and surgery. A new procedure is being tried called gamma knife, which is a type of radio surgery. It uses precise radiation to isolate and kill the tumor.
One positive aspect of this procedure is that it limits the amount of radiation that the entire brain receives so less normal brain cells are destroyed. Some Statistics Within the next year, over 100, 000 people in the U. S. will be diagnosed with brain cancer. Brain tumors are the second leading cause of death in the age group 15-34. Brain tumors are the second fastest growing cause of cancer death among those over age 65.
Approximately 44 percent of all primary brain tumors are benign. Unlike most benign tumors when located on the brain they can cause death. Because of their location brain, tumors are difficult to treat. Brain cancer research is underfunded. The cause of brain cancer is still unknown. The cure rate for brain cancer is lower than that of most other types of cancer..