The majority of these cancers will have had all of their expressed genes sequenced,
and the entirety of their transcribed DNA analyzed by a technique known as RNA-seq.
These very powerful techniques give extremely detailed genetic information not
available by traditional DNA sequencing means. This represents a shift from 2006 when
the initial glioblastoma multiforme samples only had specific genes sequenced rather
than the whole genome, a sea change provided by improved technologies in a very