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[Postictal MR-changes. A rare and important differential diagnosis]
E Hattingen1, P Raab, H Lanfermann
1Institut für Neuroradiologie, Johann-Wolfgang-Goethe-Universität Frankfurt/Main, Frankfurt, Deutschland. elke.hattingen@kgu.de
Background:
Postictal MR findings are analyzed in the context of MR morphological differential diagnoses.
Patients And Methods:
Postictal MRI was performed in 11 patients. The patterns of MR changes and their differential diagnoses were analyzed.
Results:
Focal accentuation of signal increase in the cortex was found on T2-weighted images in 90% of these cases, pial enhancement in 70% and signal changes of the pulvinar/thalamus in 40%. The most common differential diagnoses were encephalitis, and in tumor patients carcinomatous involvement of the meninges.
Conclusion:
Postictal MR changes vary widely and are difficult to differentiate from illnesses such as encephalitis and carcinomatosis involving the meninges. Nevertheless, knowledge of the typical pattern of postictal MR findings and the clinical course may help to avoid mistaken diagnoses.
Insights
Postictal MRI reveals varied findings, including cortical signal changes and pial enhancement, often mimicking encephalitis or carcinomatosis. Recognizing these patterns aids in accurate diagnosis, preventing misinterpretations.
Area of Science:
- Neuroradiology
- Neuroimaging
Context:
- Postictal Magnetic Resonance Imaging (MRI) analysis.
- Understanding MR morphological differential diagnoses.
Purpose:
- Analyze postictal MRI findings.
- Evaluate differential diagnoses in postictal patients.
Summary:
- Focal cortical signal increase on T2-weighted images (90%), pial enhancement (70%), and thalamic signal changes (40%) are common postictal MRI findings.
- Differential diagnoses include encephalitis and carcinomatous meningitis.
- Postictal MRI changes can mimic other serious neurological conditions.
Impact:
- Highlights the diagnostic challenges in interpreting postictal MRI.
- Emphasizes the importance of recognizing typical postictal patterns.
- Aids clinicians in avoiding misdiagnosis of conditions like encephalitis and carcinomatosis.
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