Safety and Effectiveness of Cysto-Ventricular Catheters for Tumor-Associated Intracranial Cysts

Overview

This retrospective study evaluated cysto-ventricular catheter (CVC) placement in patients with space-occupying cysts associated with gliomas and brain metastases. The findings indicate that CVC placement is a safe and effective intervention for reducing cyst volume and alleviating symptoms, with a favorable cyst progression-free survival profile.

Background

Space-occupying cysts are a known complication following treatment of malignant gliomas and brain metastases, occurring in up to 10–12% of cases depending on treatment modality. These cysts can cause significant neurological symptoms due to mass effect. Surgical options include cysto-peritoneal shunting, microsurgery, and endoscopic approaches, but these are often limited by cyst location. Cysto-ventricular catheters have been used successfully in other cystic brain lesions, but their efficacy specifically in glioma and metastasis-associated cysts requires further evaluation.

Data Highlights

The study included all consecutive patients treated with CVC placement from 2010 to 2021. Indications for surgery were symptomatic cysts with increasing size and no evidence of tumor progression. Volumetric MRI assessments were performed preoperatively, postoperatively, and during follow-up to quantify cyst volume changes. Cyst progression-free survival was defined as sustained cyst volume reduction over 12 months post-intervention.

Key Findings

• CVC placement resulted in immediate and sustained reduction in cyst volume in patients with glioma and brain metastasis-associated cysts.
• Symptomatic improvement was observed postoperatively, including relief from focal neurological deficits and symptoms of elevated intracranial pressure.
• The procedure demonstrated a favorable safety profile with low complication rates.
• Cyst progression-free survival was achieved in a significant proportion of patients, indicating durable cyst control.
• Stereotactic frame-based imaging-guided technique allowed precise catheter placement into cysts and ventricles or basal cisterns.

Clinical Implications

CVC placement offers a minimally invasive and effective surgical option for managing space-occupying cysts in glioma and brain metastasis patients, particularly when cyst location limits other surgical approaches. Careful patient selection and interdisciplinary planning are essential to optimize outcomes. This technique can improve neurological symptoms and potentially reduce the need for more extensive surgeries.

Conclusion

Cysto-ventricular catheter placement is a safe and effective treatment modality for tumor-associated intracranial cysts in glioma and brain metastasis patients, providing sustained cyst volume reduction and symptomatic relief. This approach represents a valuable addition to the neurosurgical armamentarium for managing these challenging cystic lesions.

References

1. Meissner et al. 2021 -- Results of CVCs in Various Cyst Entities
2. Historical and Epidemiological Data on Tumor-Associated Cysts