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False-Positive Magnetic Resonance Imaging in the Diagnosis of Vestibular Schwannoma

Objective: To describe the case of a true false-positive finding on magnetic resonance imaging, mimicking a vestibular schwannoma, and review the pertinent literature. Patients: The case of a single patient with a suspicion of a vestibular schwannoma. Intervention: A middle fossa craniotomy was performed for resection of the presumed schwannoma. Main Outcome Measures: Intraoperative findings and postoperative magnetic resonance imaging (MRI). Results: Intraoperative findings and a postoperative MRI confirm the absence of a neoplasm. Conclusion: False-positive findings on MRI, though rare, do occur. The clinician should have a high index of suspicion and consider reimaging in some cases.