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Vitamin D deficiency linked to poorer breast cancer outcomes: study (Science/Technology, 9 articles)
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Scientists know that about 75 percent of breast cancers are hormoned e p e n d e n t, meaning estrogen is the driving force. The study found that at the Mayo Clinic in Rochester, Minn., the percentage of women opting for mastectomy rather than lumpectomy began rising sharply after 2003, in reversal of a previously downward trend. Women who are deficient in vitamin D when diagnosed with breast cancer may have a poorer prognosis compared to those with optimal amounts of the sunshine nutrient in their blood, a Canadian study suggests. Dr. Pam Goodwin, principal researcher on the study and a clinician-scientist at Toronto's Mount Sinai Hospital, says it's too early to tell women with breast cancer to take vitamin D supplements just to prevent a recurrence. A growing number of women with early stage breast cancer seem to be choosing to have the whole breast removed instead of just the cancerous lump, doctors are reporting. In a large randomized trial of human lactation, researchers have found evidence that prolonged breast-feeding is associated with improved scores on some intelligence tests in childhood. Editor's note: Sheron Patterson is chronicling her journey through breast cancer.
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Galaxy's youngest supernova discovered (Science/Technology, 4 articles)
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The supernova, or stellar explosion, occurred sometime around 1868, or 140 years ago, scientists at the University of Cambridge and North Carolina State University said Wednesday. The explosion of the star would have made a bright flash but could not be seen because the star was lying close to the centre of the Milky Way galaxy and was embedded in a dense field of gas and dust. The observations, reported in a telephone news conference Wednesday, show that it is still expanding outward at an unexpectedly quick pace of perhaps 30 million miles an hour, or about 5 percent of the speed of light.
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blaster@cs.columbia.edu
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