A hippocampal lesion detected by high-field 3 tesla magnetic resonance imaging in a patient with temporal lobe epilepsy.
Nearly 80% of patients with temporal lobe epilepsy have some types of lesion identified by conventional 1.5 tesla (T) magnetic resonance imaging (MRI). We performed high-field 3 T MRI in a 5-year-old patient with recurrent complex partial seizures who was diagnosed as having right temporal lobe epilepsy based on the results of single photon emission computed tomography and ictal video-electroencephalogram monitoring, because 1.5 T MRI failed to detect any abnormalities in the suspected region. High-field 3 T MRI revealed a small high-intensity lesion on fast spin-echo short inversion time inversion-recovery images of the hippocampus, possibly responsible for the seizures. This is the first report detecting a hippocampal lesion by 3 T MRI, which could not be found by conventional 1.5 T MRI.
Sawaishi
Yukio
Y
Department of Pediatrics, Akita University School of Medicine, Japan. sawaishi@med.akita-u.ac.jp
Sasaki
Makoto
M
Yano
Tamami
T
Hirayama
Aya
A
Akabane
Jinzo
J
Takada
Goro
G
D001930:Brain Injuries / Q000175:diagnosis*; D002675:Child, Preschool; D004569:Electroencephalography; D004833:Epilepsy, Temporal Lobe / Q000473:pathology*; D005260:Female; D006624:Hippocampus / Q000293:injuries* / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D012640:Seizures; D013702:Temporal Lobe / Q000473:pathology; D015899:Tomography, Emission-Computed, Single-Photon