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Lissencephaly and pachygyria.
1Department of Radiology, King Faisal Specialist Hospital, Riyadh, Saudi Arabia.
Summary
Lissencephaly, a rare brain malformation, involves arrested development causing a smooth brain surface. Key imaging features include shallow fissures and abnormal white matter, aiding diagnosis.
Area of Science:
- Neuroscience
- Developmental Biology
- Radiology
Background:
- Lissencephaly (smooth brain) is a severe congenital brain malformation.
- It results from arrested brain development in early gestation.
- It can occur independently or with other genetic syndromes.
Observation:
- Analysis of four patients revealed key neuroimaging findings.
- Computed tomography (CT) and magnetic resonance imaging (MRI) were utilized.
- Specific features were systematically documented.
Findings:
- Characteristic features include a smooth brain surface and shallow sylvian fissures.
- Axial brain sections show a distinctive figure-eight pattern.
- Other findings include reduced white matter, thickened cortex, absent grey-white matter interdigitations, and enlarged lateral ventricles.
- Associated anomalies like microcephaly and absent corpus callosum were noted.
Implications:
- These imaging features are crucial for diagnosing lissencephaly.
- Distinguishing lissencephaly from less severe pachygyria is important.
- Understanding these features aids in characterizing the spectrum of brain malformations.