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Published on: January 2, 2012
Microcephaly with Simplified Gyral Pattern in Children: Quantitative Morphometric Assessment on Brain MRI and
Stefanie Chambers1, Mateus A Esmeraldo1, Yanniklas Kravutske1
1From the Department for Biomedical Imaging and Image-guided Therapy (S.C., Y.K., L.H., G.K.), Medical University of Vienna and Department of Radiology (S.C., M.A.E., Y.K., A.F.G., B.P.S.), Stanford University School of Medicine, Stanford, CA, USA.
Microcephaly with simplified gyral pattern (MSGP) is linked to reduced brain volume and neurodevelopmental delay. Quantitative MRI analysis reveals decreased cortical surface area as a key predictor of adverse clinical outcomes in MSGP patients.
Area of Science:
- Neuroimaging
- Developmental Neuroscience
- Quantitative Anatomy
Background:
- Microcephaly with simplified gyral pattern (MSGP) is a subtle cortical malformation often associated with epilepsy and developmental delays.
- The relationship between gyral simplification, brain volume reduction, and MRI-based prediction of clinical outcomes in MSGP remains unclear.
Purpose of the Study:
- To quantitatively differentiate simplified gyral pattern (SGP) effects from microcephaly-related volume changes.
- To correlate quantitative MRI-derived features with clinical outcomes in MSGP.
Main Methods:
- Retrospective analysis of 18 MSGP patients and 26 healthy controls using FreeSurfer for volumetric and surface-based morphometry.
- Allometric scaling corrections and spectral folding analyses were applied.
- Principal component analysis, ANCOVA, Kendall τ, and logistic regression were used to analyze group differences and predict outcomes.
Main Results:
- MSGP patients exhibited reduced white matter volume (WMV), cortical surface area, and local gyrification index (LGI), with mildly increased cortical thickness compared to controls.
- Cortical surface area was disproportionately reduced, indicating effects beyond simple microcephalic scaling.
- Reduced surface area, WMV, and LGI were identified as predictors of adverse clinical outcomes, including developmental delay.
Conclusions:
- Simplified gyral pattern may involve disturbances in cortical expansion beyond microcephaly alone.
- Reduced cortical surface area is a significant morphometric marker and MRI predictor of neurodevelopmental delay in MSGP.
- Quantitative morphometry is valuable for stratifying disease severity in MSGP.
