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Published on: May 18, 2010
Neurodevelopmental outcomes of isolated punctate white matter lesions in extremely preterm infants
Yong Eun1, Young Hwa Jung2, Young Jin Ryu3
1Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, United States; Department of Medicine, NYC Health + Hospitals / Harlem, New York, NY, United States.
Insights
Punctate white matter lesions (PWML) in extremely preterm infants were not linked to specific risk factors. These lesions did not predict adverse early neurodevelopmental outcomes in this MRI study.
Area of Science:
- Neonatal neurology
- Pediatric neuroimaging
- Developmental pediatrics
Background:
- Punctate white matter lesions (PWML) are increasingly detected in preterm infants via MRI.
- The clinical significance of isolated PWMLs in extremely preterm infants remains unclear.
- Understanding risk factors and neurodevelopmental outcomes associated with PWMLs is crucial.
Purpose of the Study:
- To investigate associations between isolated PWMLs and perinatal/postnatal risk factors in extremely preterm infants.
- To evaluate the relationship between isolated PWMLs and early neurodevelopmental outcomes.
- To clarify the clinical significance of PWMLs detected by MRI in this population.
Main Methods:
- Retrospective cohort study of infants born <28 weeks GA or <1000g birth weight.
- Brain MRI performed at term equivalent age; exclusion of major brain anomalies.
- Neurodevelopmental assessments at 6, 18-24 months, and 33-40 months corrected age.
Main Results:
- PWMLs identified in 8.5% of eligible infants (n=16/189).
- No significant differences in gestational age, birth weight, or neonatal morbidities between infants with and without PWMLs.
- No severe neurodevelopmental impairment observed; mild motor impairment at 6 months normalized by 18 months in affected infants.
Conclusions:
- Isolated PWMLs in extremely preterm infants are not associated with specific perinatal or postnatal risk factors.
- Isolated PWMLs do not appear to predict adverse early neurodevelopmental outcomes in this cohort.
- Findings suggest a potentially benign significance of isolated PWMLs in this vulnerable population.
Background:
Punctate white matter lesions (PWML) are increasingly recognized in preterm infants through magnetic resonance imaging (MRI), yet their clinical significance remains controversial. This study aimed to investigate whether isolated PWMLs in extremely preterm infants are associated with specific perinatal or postnatal risk factors and to evaluate their relationship with early neurodevelopmental outcomes.
Methods:
This retrospective cohort study was conducted at Seoul National University Bundang Hospital from January 2013 to December 2023. We included infants born at <28 weeks gestational age (GA) or with birth weight <1000 g who underwent brain MRI at term equivalent age (40 ± 2 weeks postmenstrual age). Infants with grade III-IV intraventricular hemorrhage (IVH), cystic periventricular leukomalacia (cPVL), or other major brain anomalies were excluded. Neurodevelopmental assessments were performed at 6, 18-24 months of corrected age (CA) and 33-40 months of age using standardized tools, including the Bayley Scales of Infant Development and the Korean Developmental Screening Test.
Results:
Among 189 eligible infants, PWMLs were identified in 16 (8.5%), and 173 (91.5%) had normal MRI findings. There were no significant differences in GA, birth weight, perinatal factors, or neonatal morbidities between groups. Of the 14 infants with PWMLs who completed neurodevelopmental follow-up (87.5% follow-up rate), 2 (14.3%) showed mild motor impairment at 6 months CA, which normalized by 18 months CA. No infants demonstrated severe neurodevelopmental impairment during the follow-up period.
Conclusions:
Isolated PWMLs in extremely preterm infants were not associated with specific risk factors or adverse early neurodevelopmental outcomes in this cohort.
