World cancer experts have finally declared what NewsTarget readers learned nearly four years ago: That processed meats cause cancer, and anyone seeking to avoid cancer should avoid eating all processed meats for life.

Hundreds of cancer researchers took part in a five-year project spanning more than 7,000 clinical studies and designed to document the links between diet and cancer. Their conclusion, published in the World Cancer Research Fund's report, Food, Nutrition, Physical Activity and the Prevention of Cancer: a Global Perspective (2007), has rocked the health world with a declaration that all people should immediately stop buying and eating processed meat products and that all processed meat should be avoided for life!

Parents directly poison their children every day with products far more dangerous than Mattel toys.

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Study leader Theodore Brasky said an apparent association may be related to the loss of protective function of the tonsils when they are removed.

Alternatively, tonsils that needed to be removed may have been markers for severe or chronic infections in childhood, and that such infections cause inflammation that may contribute to cancer, Brasky said.

The 10-year study, performed on a sample of 105,716 US participants, rejects prior studies that suggested a link between prematurely terminated pregnancies and breast cancer.

The subjects were nurses aged 29-46 at the start of the study. They answered questions every two years via anonymous questionnaire about their medical history, including whether they had abortions, miscarriages and breast cancer.

"Among this predominantly pre-menopausal population, neither induced nor spontaneous abortion was associated with the incidence of breast cancer," said the study's authors from Brigham and Women's hospital and Harvard Medical School in the northeastern state of Massachusetts.

The findings, published in 3 separate studies, may lead to genetic tests that will help identify those most at risk for the disease. The findings may also help unlock the biological mysteries behind prostate cancer, which could speed up the discovery of new treatments.

The 3 studies focus on DNA variations located on chromosome 8 in some men. The variations may be linked to as many as 68% of prostate cancer cases in African Americans, 60% in Japanese Americans, 46% in Latinos, 45% in native Hawaiians and 32% in whites, the authors of 1 of the studies calculate.

The 21st-century system is particularly useful for picking up breast cancers in younger women, whose breast tissue is usually too dense to be filmed accurately by the old machines.

Breast cancer expert Dr Wendy Vincent said the new equipment would provide instant images for both patient and doctor and would be invaluable in regional NSW.

"The p53 tumor suppressor is commonly mutated in human cancer," explained David Fisher, director of the Melanoma Program in Medical Oncology at Dana-Farber Cancer Institute. "Now, we've found that it plays a role in the skin's tanning response."

The researchers also linked the p53-driven process to other instances of skin darkening not associated with the sun

Earlier reports have indicated that radiotherapy regimens used in the 1970s elevate heart disease risk, but it has been less clear if more recent regimens also increase the risk.

Apart from the "clear benefits" of radiotherapy, doctors should still be aware of the potentially increased risk of cardiovascular disease following specific radiotherapy regimens in long-term breast cancer survivors, Dr. Flora E. van Leeuwen, from the Netherlands Cancer Institute in Amsterdam, and colleagues note in the report.

The recommendation for the first time by the US Preventive Services Task Force includes those with a family history of colorectal cancer.

The panel said that potential risks of taking more than 300 milligrams a day of aspirin or non-steroidal anti-inflammatory drugs, such as ibuprofen and naproxen - brand names include Motrin, Advil and Aleve - include a higher risk for stroke, intestinal bleeding or kidney failure.

Vitamin A comes pre-formed, as retinol in foods of animal origin, or in precursor form, as carotenoids in fruits and vegetables, Dr. Susanna C. Larsson, of the Karolinska Institute, Stockholm, and colleagues explain in the American Journal of Clinical Nutrition.

Vitamin A may influence the development of stomach cancer through its role in controlling cell proliferation, the researchers write. "However, epidemiologic studies of vitamin A, retinol (preformed vitamin A), and provitamin A carotenoids in relation to the risk of gastric cancer have documented inconsistent results."

The risk for developing sarcoma -- a cancer of the connective or supportive tissue -- is particularly elevated among patients with a family history of cancer or whose primary childhood bout was a form of sarcoma, a bone tumor or Hodgkin lymphoma, the researchers found.

The use of radiation and certain kinds of chemotherapy drugs was also associated with higher sarcoma risk.