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Brain Tumors and Other Space-Occupying Lesions 

Brain Tumors and Other Space-Occupying Lesions
Brain Tumors and Other Space-Occupying Lesions

Adam L Hartman

, and Ronald P. Lesser

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date: 29 September 2020

Brain tumors are a leading cause for new-onset seizures in adults, and many patients still present with seizures as their first manifestation of a tumor. Although at one time electroencephalography (EEG) was important for diagnosing brain tumors and other space-occupying lesions, this is now more commonly done using imaging studies, such as computed tomography and magnetic resonance imaging. However, clinical neurophysiology still is important in managing these patients. This can include the use of electrocorticography during testing to identify the seizure onset zone and eloquent cortex during resection surgeries, application of evoked potentials in assessing the location of sensorimotor cortex or the extent of tumor involvement, and the application of magnetoencephalography for both magnetic source imaging (e.g., in localizing spike-generating zones) and functional mapping. These topics will be discussed in this chapter.

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