NEW YORK (GenomeWeb News) – Three genomic studies published in Nature this week are expanding understanding of the mutations and structural variations that define the four subtypes of medulloblastoma, a childhood brain cancer.

"We tend to treat all medulloblastomas as one disease without taking into account how heterogeneous the tumors are at the molecular level," Yoon-Jae Cho, a neurology researcher affiliated with Stanford University, the Broad Institute, Harvard Medical School, and Children's Hospital Boston, said in a statement.

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A panel at the New York Times discusses anonymity and privacy of users of 23andMe's services when access to its database is offered for research.

National Institutes of Health Director Francis Collins appears before a House subcommittee to discuss his agency's budget request.

In PNAS this week: Akt3 amplification in glioma progression, Tibetan Plateau frog genome, and more.

The US Supreme Court has declined to review a decision involving the use of "inadvertently shed" DNA in a police investigation and subsequent conviction.