>> New breast cancer screening guidelines
>> One baby, three sources of DNA
The Med & Mic™ 05.10.23
MED NEWS blog post from Dr. Maria ON Speaking, LLC
Changes Recommended for Breast Cancer Screening
The U.S. Preventive Services Task Force drafted guidelines for women to begin screening mammograms at age 40, a decade earlier than previous recommendations. Mammograms would continue every other year until age 74. The task force’s recommendations influence what insurers covers. Screening can pick up early cancers, however it can also lead to false positives, unneeded biopsies, and treatment that isn’t necessary. The American College of Radiology recommends starting at age 40 with annual mammograms. The USPSTF’s new guidelines are now open for public comment. (Source: STAT News, A. Chen, 5.9.23)
Baby with DNA from Three People
With a groundbreaking in vitro fertilization technique called mitochondrial donation treatment, a baby has been born in the UK with DNA from three people: the mother, the father, and a mitochondria donor. The technique creates embryos that are free from harmful mutations in the mother’s mitochondrial DNA that would be passed down. The procedure involves three steps: 1) After the mother’s egg has been fertilized by the father’s sperm, the nucleus is removed and stored. 2) The nucleus of a donor egg is removed, but the mitochondria remain. 3) The parent’s nucleus is placed into the donor egg with the healthy mitochondria. The resulting baby’s DNA is 99.8% from the mother and father. (Source: The Guardian, I. Sample, 5.9.23)
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