Glioma Glioblastoma multiforme 2013-02-23T09:47:02Z SNOMEDCT_US:63634009 SNOMEDCT_US:393563007 HP:0012174 Glioblastoma UMLS:C1621958 A tumor arising from glia in the central nervous system with macroscopic regions of necrosis and hemorrhage. Microscopically, glioblastoma multiforme is characterized by regions of pseudopalisading necrosis, pleomorphic nuclei and cells, and microvascular proliferation. HP:0100843