MedPage Today -- DENVER, April 23 -- Magnetic resonance imaging has been used -- for what investigators think is the first time -- to pick out a genetic mutation in a brain tumor. In glioblastoma multiforme, changes in regional cerebral blood volume picked up by MR perfusion-weighted imaging can indicate that the tumor carries a particularly aggressive oncogene, according to Donald O’Rourke, M.D., of the University of Pennsylvania.
