Glioblastoma (GBM) is a grade 4 astrocytoma, the most aggressive form of malignant brain tumor. It primarily affects the brain but can, in rare cases, impact the spinal cord. GBM is the most common malignant primary brain tumor in adults, known for its rapid growth and ability to infiltrate surrounding brain tissue. You can learn more about this and other frequently asked questions on our Glioblastoma 101 page on our website. gbmresearch.org/glioblastoma-101 #GBM #BrainTumor #GBMRO #BrainCancer