CANCER
Cancer is a class of diseases in which a group of cells display uncontrolled growth, invasion,and sometimes metastasis. These three malignant properties of cancers differentiate them from benign tumors, which are self-limited, and do not invade or metastasize. Most cancers form a tumor but some, like leukemia, do not. The branch of medicine concerned with the study, diagnosis, treatment, and prevention of cancer is oncology.
1&3 lungs, 2 spine, 4 ribs, 5 aorta, 6 spleen, 7&8 kidneys, 9 liver.
Cancer may affect people at all ages, even fetuses, but the risk for most varieties increases with age. Cancer causes about 13% of all deaths.According to the American Cancer Society, 7.6 million people died from cancer in the world during 2007. Cancers can affect all animals.