Cancer

DNA blood test detects lung cancer mutations

Cancer DNA circulating in the bloodstream of lung cancer patients can provide doctors with vital mutation information that can help optimise treatment when tumour tissue is not available, an international group of researchers ...

Apr 17, 2015
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Tumors prefer the easy way out

Tumor cells become lethal when they spread. Blocking this process can be a powerful way to stop cancer. Historically, scientists thought that tumor cells migrated by brute force, actively pushing through whatever ...

Apr 17, 2015
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Study finds genetic link for rare intestinal cancer

Heredity accounts for up to 35 percent of small intestinal carcinoid, a rare digestive cancer, according to findings from a team at the National Institutes of Health. The researchers examined families with ...

Apr 17, 2015
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Smokers underestimate risks of a few cigarettes

Many people still dangerously underestimate the health risks associated with smoking even a few cigarettes a day, despite decades of public health campaigning, French researchers have reported at the European Lung Cancer ...

Apr 17, 2015
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Immune cells can promote liver cancer

A team of Newcastle University scientists have found that specialised immune cells in our bodies that normally act to protect us from infections can have a dark side in the development of liver cancer.

Apr 17, 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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