Embolization of Vascular Supply in Glioblastoma: Techniques and Clinical Implications

Overview

Preoperative embolization of tumor-feeding arteries in glioblastoma is a technically feasible and safe adjunct to surgery in selected cases with hypervascular tumors. This approach reduces intraoperative bleeding, shortens operative time, and improves anatomical orientation by using radiopaque embolic materials as intraoperative landmarks.

Background

Glioblastoma is the most aggressive primary brain tumor with a median survival of 15–18 months despite multimodal therapy. Maximal safe resection significantly influences patient outcomes, and detailed preoperative vascular evaluation is crucial, especially for tumors with deep or hypervascular components. Cerebral angiography provides superior identification of tumor feeders and vascular anatomy compared to CT or MR angiography. Preoperative embolization, commonly used in meningioma surgery, has limited application in glioblastoma but may offer benefits in selected cases.

Data Highlights

The study was a single-institution retrospective analysis conducted between December 2023 and July 2025. Embolization was performed using a 3-Fr distal radial approach with detachable coils or small-volume NBCA. Safety protocols included systemic heparinization, continuous catheter flushing, and super-selective angiography to confirm tumor-restricted perfusion. Neurological monitoring was conducted under local anesthesia. Post-procedure monitoring included neurological assessments and MRI to exclude ischemic complications. Neurological complication rates align with established benchmarks of 2–3% for cerebral angiography.

Key Findings

• Preoperative embolization was selectively performed only when tumor-restricted perfusion was unequivocally confirmed, avoiding feeders supplying eloquent cortex or critical perforators.
• Embolization was limited to proximal flow reduction to minimize ischemic risk, avoiding distal parenchymal embolization.
• Radiopaque embolic materials (coils and NBCA) served as intraoperative landmarks, facilitating identification of feeders and improving surgical orientation.
• Embolization reduced intraoperative bleeding and enabled bloodless venous peeling and improved hemostasis during tumor resection.
• Neurological monitoring and safety protocols resulted in low complication rates consistent with standard cerebral angiography procedures.
• Postoperative MRI confirmed gross-total or total tumor resection in embolized cases, demonstrating the technique’s utility in achieving maximal safe resection.

Clinical Implications

Preoperative embolization can be a valuable adjunct in glioblastoma surgery for tumors with hypervascularity or complex vascular anatomy, improving surgical safety and efficiency. Careful patient selection and adherence to conservative embolization protocols are essential to minimize ischemic risks. The use of radiopaque embolic agents provides useful intraoperative landmarks that enhance anatomical orientation and facilitate maximal safe tumor resection.

Conclusion

Preoperative embolization of glioblastoma feeders is a feasible and safe technique that enhances intraoperative management by reducing bleeding and improving anatomical guidance. This strategy may contribute to improved surgical outcomes in selected hypervascular glioblastoma cases.

References

1. Institutional Study 2023-2025 -- Embolization of Vascular Supply in Glioblastoma: Techniques and Clinical Implications Prior to Surgery