A 27-year-old man has had several episodes of unprovoked anxiety and fear with a rising sensation in his stomach, following which he loses consciousness for 1 to 2 minutes. When he awakens he is confused and has a severe headache which lasts 10 to 15 minutes. His past medical history is unremarkable. His general and neurologic examinations are intact except for a visual field loss in the left superior quadrant of both eyes. An EEG and MRI are ordered. The MRI is most likely to show a mass in which of the following brain regions?
A. left frontal
B. left temporal
C. right frontal
D. right parietal
E. right temporal
