Journal Article

Retrospective longitudinal assessment of optic nerve sheath diameter in patients with malignant glioma

Schuhmann, Martin U., Feucht, Daniel, Roder, Constantin, Ruff, Christer, Zipfel, Julian, Kerscher, Susanne R.

2023

Overview

Introduction Glioblastoma (GBM) is a tumor with rapid growth and a possible relationship to elevated intracranial pressure (ICP). High ICP may not always be associated with clinical signs. A non‐invasive technique for assessment of ICP is measuring the optic nerve sheath diameter (ONSD). Identifying patients who need immediate intervention is of importance in neuro‐oncological care. The goal of this study is to assess the available magnetic resonance imaging (MRI) of patients with GBM with respect to pre‐ and postoperative ONSD. Methods and Materials Retrospective data analysis was performed on all patients operated for GBM at a tertiary care center between 2010 and 2020. Two pre and one postoperative MRI had to be available. Clinical data and ONSD at multiple time points were analyzed and correlated, as well as preoperative volumetrics. Results Sixty‐seven patients met the inclusion criteria. Clinical signs of elevated ICP were seen in 25.4% (n = 17), while significant perifocal edema was present in 67.2% (n = 45) of patients. Clinical signs of preoperatively elevated ICP were associated with significantly elevated ONSD at diagnosis (p < 0.001) as well as preoperative tumor volume (p < 0.001). Significant perifocal edema at the time of diagnosis was associated with elevated ONSD (p = 0.029) and higher tumor volume (p = 0.003). In patients with significant edema, ONSD increased significantly between preoperative MRIs (p = 0.003/005). In patients with clinical signs of raised ICP, ONSD also increased, whereas it was stable in asymptomatic patients (yes: 5.01+/−4.17 to 5.83+/−0.55 mm, p = 0.010, no: 5.17+/−0.46 mm to 5.38+/−0.41 mm, p = 0.81). A significant increase of ONSD from diagnosis to preoperative MRI and a significant decrease until 3 months postoperatively were observed (p < 0.001). Conclusions ONSD might help identify high ICP in patients with GBM. In this first‐of‐its kind study, we observed a significant increase of ONSD preoperatively, likely associated with edema. Postoperatively, ONSD decreased significantly until 3 months after surgery and increased again at 12 months. Further prospective data collection is warranted. Measurement of optical nerve sheath diameter (ONSD) is a noninvasive technique for assessment of intracranial pressure. Identifying patients at risk with the need of immediate intervention is of importance in neuro‐oncological care. This study retrospectively investigates pre‐ and postoperative ONSD in patients with glioblastoma.

• Publisher: John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
• Subject: Data collection / Diagnosis / Edema / Glioblastoma / Glioma / Hydrocephalus / Intracranial pressure / Localization / Magnetic resonance imaging / Optic nerve / optic nerve sheath diameter / Patients / Regression analysis / Surgery / Tumors