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The reversible focal MRI abnormalities in complex partial seizure: technical instruction.
Kook-Hee Yang1, Dong-Seok Kim, Joong-Uhn Choi
1Department of Neurosurgery, Brain Research Institute, Yonsei University College of Medicine, C PO Box 8044, Seoul, Korea.
Summary
Transient MR signal changes in infants with seizures may not indicate structural abnormalities but can result from epileptic discharge propagation. Follow-up is crucial to rule out tumors and other conditions.
Area of Science:
- Neurology
- Pediatric Neurology
- Neuroimaging
Background:
- Epilepsy in infants can present with complex partial seizures and hemiparesis.
- Magnetic Resonance (MR) imaging is a key tool for diagnosing neurological conditions.
- Understanding the nature of MR signal changes post-seizure is critical for accurate diagnosis.
Observation:
- A 17-month-old infant experienced complex partial seizures and right hemiparesis.
- MR imaging revealed transient signal changes in the left hemisphere, alongside a cavernous hemangioma.
- Scalp electroencephalogram (EEG) localized the epileptic focus to the mid-temporal gyrus.
Findings:
- The observed MR signal changes normalized within 11 days post-seizure, excluding the hemangioma.
- Following a lesionectomy of the cavernous hemangioma, MR showed no abnormalities.
- The patient remained seizure-free during a 12-month post-operative follow-up.
Implications:
- Transient MR signal alterations in epilepsy patients may not always correlate with structural lesions.
- These changes can be indicative of epileptic discharge propagation along neural pathways.
- Post-seizure MR findings necessitate careful follow-up to differentiate from structural pathologies like tumors.