Cancer

Yo-yo dieting not associated with increased cancer risk

The first comprehensive study of its kind finds weight cycling, repeated cycles of intentional weight loss followed by regain, was not associated with overall risk of cancer in men or women. The study by American Cancer Society ...

8 hours ago
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Fighting cancer head-on

Head and neck cancers are the sixth most common malignancies worldwide. Yet few are diagnosed before stage 3 or 4, when the cancer has already spread to the lymph nodes or beyond. New research is helping scientists better ...

13 hours ago
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Study reveals new insight into DNA repair

DNA double-strand breaks (DSBs) are the worst possible form of genetic malfunction that can cause cancer and resistance to therapy. New information published this week reveals more about why this occurs and how these breaks ...

8 hours ago
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Researcher discovers trigger of deadly melanoma

Skin cancer is the most common of all cancers, and melanoma, which accounts for 2% of skin cancer cases, is responsible for nearly all skin cancer deaths. Melanoma rates in the US have been rising rapidly over the last 30 ...

9 hours ago
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Molecular spies to fight cancer

Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), in cooperation with colleagues at the University of Zurich and the Ruhr-Universität Bochum, have for the first time successfully tested a new tumor diagnosis ...

9 hours ago
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5 things about Congress' fight over Planned Parenthood

Republicans will likely lose Monday's Senate showdown over halting federal aid to Planned Parenthood. Yet the political offensive by abortion foes has just started, prompted by a batch of unsettling videos that has focused ...

17 hours ago
popularity15 comments 0

Childhood cancer cells drain immune system's batteries

Cancer cells in neuroblastoma contain a molecule that breaks down a key energy source for the body's immune cells, leaving them too physically drained to fight the disease, according to new research published in the journal ...

Aug 02, 2015
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Cancer /ˈkænsər/ ( listen), known medically as a malignant neoplasm, is a broad group of various diseases, all involving unregulated cell growth. In cancer, cells divide and grow uncontrollably, forming malignant tumors, and invade nearby parts of the body. The cancer may also spread to more distant parts of the body through the lymphatic system or bloodstream. Not all tumors are cancerous. Benign tumors do not grow uncontrollably, do not invade neighboring tissues, and do not spread throughout the body.

Determining what causes cancer is complex. Many things are known to increase the risk of cancer, including tobacco use, certain infections, radiation, lack of physical activity, poor diet and obesity, and environmental pollutants. These can directly damage genes or combine with existing genetic faults within cells to cause the disease. Approximately five to ten percent of cancers are entirely hereditary.

Cancer can be detected in a number of ways, including the presence of certain signs and symptoms, screening tests, or medical imaging. Once a possible cancer is detected it is diagnosed by microscopic examination of a tissue sample. Cancer is usually treated with chemotherapy, radiation therapy and surgery. The chances of surviving the disease vary greatly by the type and location of the cancer and the extent of disease at the start of treatment. While cancer can affect people of all ages, and a few types of cancer are more common in children, the risk of developing cancer generally increases with age. In 2007, cancer caused about 13% of all human deaths worldwide (7.9 million). Rates are rising as more people live to an old age and as mass lifestyle changes occur in the developing world.

This text uses material from Wikipedia licensed under CC BY-SA

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