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Published on Oct 5, 2010
3D Animation which depicts the growth of a tumor. "What is Cancer?" Cancer /ˈkænsər/ ( listen) (medical term: malignant neoplasm) is a class of diseases in which a cell, or a group of cells display uncontrolled growth (division beyond the normal limits), invasion (intrusion on and destruction of adjacent tissues), and sometimes metastasis (spread to other locations in the body via lymph or blood). 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.
Cancer affects people at all ages with the risk for most types increasing with age. It caused about 13% of all human deaths in 2007 (7.6 million). Cancers are primarily an environmental disease with 90-95% of cases due to lifestyle and environmental factors and 5-10% due to genetics. Common environmental factors leading to cancer death include: tobacco (25-30%) , diet and obesity (30-35%), infections (15-20%), radiation, stress, physical activity, environmental pollutants. These environmental factors cause abnormalities in the genetic material of cells.
(music by: Bjorn Lynne - Blissful Moments, courtesy of www.Shockwave-Sound.com)