This Week in PNAS

Researchers from the Fred Hutchinson Cancer Research Center and elsewhere report on molecular subgroups detected in human glioma samples that were analyzed using a combination of genomic data. The team used multidimensional scaling to assess single nucleotide changes, copy number alterations, transcriptome patterns, and methylation profiles generated by the Cancer Genome Atlas on glioblastoma and low-grade glioma tumors.

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CNN reports that researchers have tied a new variant to opioid addiction risk.

Organoids derived from patients' tumors may help determine what chemotherapy treatment patients would benefit from, according to New Scientist.

An initiative from GenomeAsia 100K hopes to increase the number of South Asians in genetic research, according to NBC News.

In Science this week: genomic analysis of ancient and modern horses indicates population turnover, and more.