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A Unified Methodological Framework for Vestibular Schwannoma Research
Published on: June 20, 2017
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Tracking Spontaneous Vestibular Schwannoma Regression with Volumetric Measurements
Evan J Patel1, Nicholas L Deep1, Michael Schecht2
1Department of Otolaryngology-Head and Neck Surgery, NYU Langone Health, New York, New York, U.S.A.
The Laryngoscope
|October 26, 2020
Summary
Spontaneous vestibular schwannoma (VS) regression is rare, observed in 3.9% of patients. Volumetric MRI measurements are crucial for accurately detecting these shrinking tumors.
Area of Science:
- Neurosurgery
- Radiology
- Oncology
Background:
- Vestibular schwannoma (VS) is a tumor arising from the Schwann cells of the vestibulocochlear nerve.
- While VS typically grows over time, spontaneous regression is a rare phenomenon.
- Understanding the characteristics of regressing VS is important for management strategies.
Purpose of the Study:
- To characterize patients with MRI evidence of spontaneous vestibular schwannoma (VS) regression.
- To identify potential factors associated with VS regression.
Main Methods:
- Retrospective case series of patients with untreated, sporadic VS and documented spontaneous regression.
- Volumetric tumor size changes were assessed using serial MRI scans between 2012 and 2020.
- Outcome measures included tumor size, location, symptoms, and audiometric changes.
Main Results:
- 13 patients (3.9% of observed cases) showed spontaneous VS regression, with a mean decrease in tumor size of 36.1%.
- The average rate of volume decrease was 15.8 mm³/year.
- No significant differences were found between major (>40% volume reduction) and minor (<40% volume reduction) regression groups.
Conclusions:
- Spontaneously shrinking vestibular schwannomas present heterogeneously.
- Predicting which tumors will regress is currently unclear due to the phenomenon's rarity.
- Volumetric measurements from serial MRI scans enhance the detection accuracy of shrinking tumors.
