Certain Circumstances

The US Preventive Services Task Force has updated its recommendations for assessing and testing BRCA1 and BRCA2 mutations for breast and ovarian cancer susceptibility. As the task force's chair, Virginia Moyer, writes in the Annals of Internal Medicine, routine genetic screening in the absence of family history of the disease is not warranted.

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In Science this week: gene linked to expansion of the human neocortex, and more.

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