Abstract
Objective
A better understanding of the natural history of vestibular schwannoma (VS) has resulted in a change in treatment paradigms. It has also been proposed that increased use of high-resolution magnetic resonance imaging has allowed for an increased identification of small tumors. The aim of this study was to evaluate recent trends in the presentation and primary management of VS in the United States.
Study Design
Retrospective analysis of the National Cancer Database (NCDB).
Setting
NCDB database.
Subjects and Methods
All patients with a diagnosis of VS between 2004 and 2014 were included. Data were analyzed with univariable and multivariable logistic regression.
Results
In total, 28,190 patients (mean age 55 years, 52.9% female) with VS were analyzed. Linear regression showed a small decrease in average tumor size over time (–0.06 mm/year, P = .03). Overall, 11,121 patients (40%) received surgery, 8512 (30%) radiation, and 7686 (27%) observation. Controlling for patient, tumor, and treatment center factors, the odds ratio (OR) for receiving surgery in 2014 was 0.60 (confidence interval [CI], 0.50-0.71) while the OR for receiving radiation was 0.75 (CI, 0.64-0.87) as compared to those diagnosed in 2004. The largest increases in observation rates occurred among tumors ≤2 cm (P < .001).
Conclusion
There was not a clinically significant change in the average tumor size at diagnosis. Although surgery remained the most common treatment modality in the United States, there was a strong shift in the management of VS away from primary surgery and radiation and toward a “wait-and-scan” approach.
Keywords
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