Cancer

Weight in adolescence may affect colorectal cancer risk

A new study has uncovered a link between being overweight or obese in adolescence and an increased risk of developing colon cancer in adulthood. Obesity was also associated with an elevated risk of developing rectal cancer. ...

1 hour ago
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GOP health bill still a mystery before planned vote

The Senate will move forward with a key vote this week on a Republican health bill but it's not yet known whether the legislation will seek to replace President Barack Obama's health care law or simply repeal it.

1 hour ago
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Is cancer just a question of 'bad luck'?

"Doctor, what caused my cancer?" For doctors, this question is often perplexing. Some of the population risk factors are known, but when it comes to specific cases, only assumptions can be made. However, scientists have a ...

Jul 19, 2017
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How CD44s gives brain cancer a survival advantage

Understanding the mechanisms that give cancer cells the ability to survive and grow opens the possibility of developing improved treatments to control or cure the disease. In the case of glioblastoma multiforme, the deadliest ...

Jul 19, 2017
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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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