This increase is thought to be connected to exposure to sunlight, although that is difficult to prove for a large population - the relationship seems clearer in individual cases. Since the rate change seems too high to be accounted for by sunbathing alone, especially since fewer people now work outdoors, perhaps changes in the ozone layer or another environmental factor is involved. The reason for such a rise is not completely clear. Cancer in children is also rising in incidence, especially acute lymphocytic leukemia and brain or nervous system cancers. Symptoms you are likely to notice Many changes occur with cancers.
Cancers often form lumps or sores that can be felt or seen.
Bleeding is a common symptom, as is unexplained pain. There may be otherwise unexplained symptoms of weight loss, nausea , or changes in bowel movements or stools. Sometimes persistent flulike symptoms occur as the immune system attempts to fight the disease. When in doubt, consult a physician. Symptoms your physician may observe Although a physician can often recognize cancer from experience or from viewing a sore, a sonogram, or an X-ray image, the main proof comes from biopsy, the direct examination of cells by a trained specialist called a pathologist.