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Cancer
Cancer is a collection of various diseases characterized by abnormal cell growth. Cancerous cells divide and replicate without stopping, spread to surrounding areas and can form malignant tumors. Benign tumors are not cancerous. Unlike malignant tumors, once removed, they don't usually grow back. Cancer can begin almost anywhere in the body and can have varying levels of severity.

en.wikipedia.org/wiki/Cancer

Cancer is a group of diseases involving abnormal cell growth with the potential to invade or ..... Cancer prevention is defined as active measures to decrease cancer risk. The vast majority of cancer cases are due to environmental risk factors.

www.cancer.gov/publications/dictionaries/cancer-terms?cdrid=45333

Definition of cancer.

www.cancer.gov/about-cancer/understanding/what-is-cancer

Feb 9, 2015 ... Explanations about what cancer is, how cancer cells differ from normal cells, ... Our definition of neuroendocrine tumors has more information.

www.merriam-webster.com/dictionary/cancer

Define cancer: a serious disease caused by cells that are not normal and that can spread to one or many parts of the body — cancer in a sentence.

www.medicinenet.com/script/main/art.asp?articlekey=2580

Read medical definition of Cancer.

www.cancer.org/cancer/cancer-basics/what-is-cancer.html

Dec 8, 2015 ... Cancer is the name for a group of more than 100 diseases in which cells begin to grow out of control. Read more...

en.oxforddictionaries.com/definition/cancer

a disease caused by an uncontrolled division of abnormal ... Meaning, pronunciation, example sentences, and more from Oxford Dictionaries.

www.dictionary.com/browse/cancer

Cancer definition, a malignant and invasive growth or tumor, especially one originating in epithelium, tending to recur after excision and to metastasize to other ...

kidshealth.org/en/kids/cancer.html

When kids get cancer, it can often be treated and cured. Find out more in this article for kids.