Glioblastoma Disrupts the Brain Far Beyond the Tumor

KREMS, Austria - April 22, 2026 - PRLog -- Glioblastoma, the most aggressive malignant brain tumor in adults, is not an isolated lesion, but a disease that destabilizes the brain's communication network. A new study shows that survival is closely linked to how strongly the tumor affects large-scale white matter connections, the pathways that allow distant brain regions to exchange information. Using preoperative MRI data and computer-based analysis, the international research team found that network-related measures predicted one-year survival more accurately than basic clinical factors alone. The work, led by Karl Landsteiner University (KL Krems), reflects a broader shift in brain tumor research: away from looking only at the tumor itself and toward assessing how it disturbs the surrounding brain. This could help refine prognosis and support more individualized treatment decisions.

Glioblastoma remains difficult to treat despite surgery, radiotherapy, and chemotherapy. One reason is that the tumor does not simply grow as a compact mass. It also infiltrates white matter, the "wiring" of the brain, and can thereby disrupt communication between regions that are essential for movement, memory and cognition. That makes it important to look beyond size and location alone, especially for predicting overall survival. Researchers at the Institute of Medical Radiology at the University Clinic of St. Pölten, a teaching and research site of KL Krems, therefore investigated how glioblastoma alters the brain's structural connectome — the network of white matter links connecting different brain regions — as a whole."

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