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Bryan Parthum 2-21-01 Block 2 Brain and Spinal Cord Cancer What is Cancer Cancer is a group of many related diseases All forms of cancer involve out-of-control growth and spread of abnormal cells Cancer cells continue to grow and divide and can spread to other parts of the body These cells accumulate and form tumors They may compress invade and destroy normal tissue If cells break away from a tumor they can travel through the bloodstream or the lymph system to other areas of the body There they may settle and form colony tumors In their new location the cancer cells continue growing The spread of a tumor to a new site is called metastasis Leukemia a form of cancer does not usually form a tumor Instead these cancer cells involve the blood and blood-forming organs bone marrow lymphatic system and spleen They circulate through other tissues where they can accumulate Cancer is classified by the part of the body in which it began and by its appearance under a microscope Different types of cancer vary in their rates of growth patterns of spread and responses to different types of treatment Symptom or Sign A symptom is an indication of disease illness injury or that something is not right in the body Symptoms can be felt or noticed by a patient but usually not easily observed by anyone else A sign is also an indication of illness injury or that something is not right in the body Signs are defined as observations made by a physician nurse or other health care professional Prevention and Risk Factors A large majority of cases of Brain and Spinal Cancer are not associated with any risk factors The few risk factors that are known are radiation immune system problems and family history Radiation is the only known and proved risk that can cause cancer Also people with impaired immune systems have an increased risk
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