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[SPECT, MRI and EEG in infants with lissencephaly]
Insights
This study investigated lissencephaly using advanced imaging techniques. Findings suggest abnormal cortical architecture in lissencephaly may explain increased tracer uptake in the cerebral cortex observed via SPECT scans.
Area of Science:
- Neuroscience
- Medical Imaging
- Pediatric Neurology
Background:
- Lissencephaly is a brain malformation characterized by a smooth cerebral surface.
- Infants with lissencephaly often present with severe epilepsy.
- Advanced neuroimaging is crucial for understanding lissencephaly's pathophysiology.
Observation:
- Two infants with lissencephaly underwent electroencephalography (EEG), magnetic resonance imaging (MRI), and single photon emission tomography (SPECT).
- EEG revealed distinct seizure patterns in both infants.
- Cranial CT and MRI showed thickened cortex and enlarged ventricles.
Findings:
- SPECT scans demonstrated diffuse tracer uptake in the cerebral cortex of both infants.
- This increased cortical uptake was notable when compared to the basal ganglia and cerebellum.
- The observed SPECT patterns correlate with the known cortical dysplasia in lissencephaly.
Implications:
- SPECT imaging may reveal functional consequences of abnormal cortical development in lissencephaly.
- These findings enhance our understanding of cerebral malformations and their neurobiological underpinnings.
- Further research can explore the diagnostic and prognostic value of SPECT in lissencephaly.
Abstract:
Single photon emission tomography (SPECT), MRI and EEG were studied in two infants with lissencephaly. One infant had generalized tonic convulsions at 7 month of age and continuous high voltage fast activities on EEG. The other infant developed infantile spasms at the age of 2.5 months, and showed low voltage disorganized background with pseudorhythmic high voltage sharp waves on EEG. Cranial CT and MRI in both infants revealed abnormally thick cortex, dilatation of the lateral ventricles, and smooth or relatively smooth cerebral surface. In SPECT studies, a diffuse increase of tracer uptake was shown at the cerebral cortex compared with the basal ganglia or cerebellum in both infants. The SPECT finding might reflect the abnormal cortical architectures in this cerebral malformation.