An Australian population study of factors associated with MRI patterns in cerebral palsy
Susan M Reid1, Charuta D Dagia, Michael R Ditchfield
1Developmental Disability and Rehabilitation Research, Murdoch Childrens Research Institute, Melbourne, Australia; Department of Paediatrics, University of Melbourne, Melbourne, Australia.
Insights
Cerebral palsy (CP) magnetic resonance imaging (MRI) patterns vary by risk factors. White matter injury is most common, with specific patterns linked to parity, gestation, and perinatal factors, aiding future research.
Area of Science:
- Neurology
- Pediatrics
- Radiology
Background:
- Cerebral palsy (CP) is a complex neurological disorder with diverse underlying causes.
- Magnetic resonance imaging (MRI) is crucial for identifying brain abnormalities in children with CP.
- Understanding the distribution of MRI patterns and their associations with perinatal factors is essential for etiological research.
Purpose of the Study:
- To characterize the spectrum of MRI findings in a large cohort of children with CP.
- To investigate the relationship between specific MRI patterns and antenatal/perinatal variables.
Main Methods:
- Retrospective analysis of data from the Victorian CP Register (884 children, born 1999-2006).
- Classification of postneonatal MRI patterns for 594 children.
- Comparison of MRI pattern frequencies with antenatal and perinatal variables for 563 children.
Main Results:
- White matter injury (45%) was the predominant MRI pattern, followed by grey matter injury (14%) and normal imaging (13%).
- Significant associations were found between MRI patterns and parity, birth gestation, neonatal care level, Apgar score, and respiration time (p<0.01).
- Nulliparity correlated with focal vascular insults, multiparity with malformations, and severe perinatal compromise with grey matter injury.
Conclusions:
- Known risk factors for CP exhibit differential associations with specific MRI patterns.
- Future etiological research in CP may benefit from stratifying analyses by pathogenically defined MRI groups.
Aim:
The aim of this study was to describe the distribution of magnetic resonance imaging (MRI) patterns in a large population sample of children with cerebral palsy (CP) and to examine associations between MRI patterns, and antenatal and perinatal variables.
Method:
Data were retrieved from the Victorian CP Register for 884 children (527 males, 357 females) born between 1999 and 2006. Postneonatal MRI was classified for 594 children. For 563 children (329 males, 234 females) for whom classification was to a single MRI pattern, the frequency of each variable was compared between patterns and with the population frequency.
Results:
White matter injury was the most common MRI pattern (45%), followed by grey matter injury (14%), normal imaging (13%), malformations (10%), focal vascular insults (9%), and miscellaneous patterns (7%). Parity, birth gestation, level of neonatal care, Apgar score, and time to established respiration varied between MRI patterns (p<0.01). Nulliparity was most strongly associated with focal vascular insults, whereas multiparity was associated only with malformations. Grey matter injury was not associated with birth in a tertiary unit, but was strongly associated with severe perinatal compromise. The frequency of neonatal seizures and of nursery admissions was lowest among children with malformations.
Interpretation:
As known risk factors for CP are differentially associated with specific MRI patterns, future exploration of causal pathways might be facilitated when performed in pathogenically defined groups.
