Tc-99m MIBI Brain SPECT of an Acoustic Schwannoma

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A 57-year-old woman with a large acoustic schwannoma proven by MRI underwent Tc-99m methoxy isobutyl isonitrile (MIBI) stress myocardial imaging for preoperative cardiac evaluation. Brain SPECT was performed while she was waiting for resting myocardial scintigraphy. This study demonstrated markedly increased radiotracer uptake by the tumor in the left cerebellopontine angle. The most common tumors occurring in the cerebellopontine angle and internal auditory canal are acoustic neuromas.

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