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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The New York City medical examiner is overseeing an effort to identify missing persons using DNA, according to the Associated Press.

Nobel laureate Günter Blobel has died at 81, the New York Times reports.

In PNAS this week: mouse model of genetically induced emphysema, gene expression signatures of circulating melanoma cells, and more.

Technology Review reports that 2017 was the year of consumer genetic testing and that it could spur new analysis companies.