Beginning of Essay
Brain and spinal cord tu mors are abnormal growths of tissue found inside the skull or the bony spinal column. Tumors are classed as benign (non cancerous) of malignant (cancerous) benign tumors cells are similar to other normal cells, grow slowly and confined ....

Middle of Essay
.... tumors. The cause of most brain and spinal cord tumors remains a mystery. Scientists do not know exactly why cells in the nervous system or elsewhere in the body lose their normal identity such as (nerves, blood, or skin) grow uncontrollably. Possible causes under investigation include viruses, defective genes, and chemicals. Metastatic tumors occur when the cancer cells break from tumors in other parts of the body, travel throw the blood stream, hook up to other tissues and make new tumors inside the brain and spinal cord. The top two culprits that lead to metastatic tumors in the spinal cord and brain are lung and breast cancer. Brain ....