RT Journal Article SR Electronic T1 Seizure-induced transient hippocampal abnormalities on MR: correlation with positron emission tomography and electroencephalography. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1736 OP 1738 VO 16 IS 8 A1 J E Cox A1 V P Mathews A1 C C Santos A1 A D Elster YR 1995 UL http://www.ajnr.org/content/16/8/1736.abstract AB We report transient focal abnormalities on MR in a patient having frequent electrographic seizures that were not obvious clinically. Marked mass effect (confirmed with volumetric studies) and abnormal T2 signal intensity in the right hippocampal region correlated with electroencephalographic ictal activity and with increased positron-emitting radiotracer uptake in the medial temporal lobe. The follow-up MR 2 months later, after electroencephalography findings normalized, revealed no hippocampal abnormalities.