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Lung cancer Lung cancer is a disease characterized by uncontrolled cell growth in tissues of the lung . If left untreated, this growth can spread … CancerLearn more: http://www.khanacademy.org/video?v=RZhL7LDPk8w An introduction to what cancer is and how it is the by-product of broken DNA replication. Cancer (Malignant Tumor) Types, Facts, Survival Rates …http://www.medicinenet.com/cancer/article.htm Learn about […] i love you Do not forget comments