PMC4307954_01
EEG (longitudinal bipolar montage, LFF at 1 Hz, HFF at 70 Hz, sensitivity: 7 muV/mm, 20 s/page) associated with a typical syncopal episode: A, onset; B and C, during the episode; and D, offset.
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The EEG during the spells was characterized by generalized synchronous and asynchronous high amplitude 1- to 2-Hz delta activity which progressed to generalized attenuation and then transitioned to generalized delta activity again with recovery (Fig. 1).
Brain MRI: Postcontrast T1-weighted coronal image showing left-sided glomus jugulare tumor with extension to the posterior cranial fossa.
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An MRI of the brain (Fig. 2) done on hospital day 3 showed an enhancing T2 hyperintense left skull base mass in the region of the left jugular foramen with extension into the posterior cranial fossa and below the base of the skull.