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Clinical assessment, MRI, and EMG in congenital brachial plexus palsy
1Department of Pediatrics, Istanbul University, Medical Faculty of Istanbul, Turkey.
Insights
The Hospital for Sick Children muscle scoring system is the most effective method for predicting outcomes in infants with congenital brachial plexus palsy. Early magnetic resonance imaging and electromyography offer valuable insights into prognosis.
Area of Science:
- Pediatric Neurology
- Neonatal Imaging
- Musculoskeletal Disorders
Background:
- Congenital brachial plexus palsy (CBPP) affects infants, impacting arm function.
- Accurate prognostic indicators are crucial for timely intervention and management.
- Current diagnostic tools have varying degrees of predictive value.
Purpose of the Study:
- To evaluate the predictive accuracy of magnetic resonance imaging (MRI), electromyography (EMG), and the Hospital for Sick Children (HSC) muscle scoring system for CBPP outcomes.
- To compare the efficacy of these methods in assessing prognosis at 12 months of age.
Main Methods:
- Longitudinal study of 13 infants with CBPP.
- Utilized serial MRI (neonatal and 3 months), EMG (neonatal and 3 months), and HSC muscle scoring (3, 6, 9 months).
- Correlated findings with clinical status at 12 months.
Main Results:
- MRI revealed pseudomeningoceles in poor and good prognosis groups; more visible at 3 months.
- EMG suggested root avulsion in 3/5 poor prognosis cases, potentially underestimating severity.
- HSC muscle scoring system demonstrated the highest predictive accuracy for patient prognosis.
Conclusions:
- The HSC muscle scoring system is the most reliable method for predicting long-term outcomes in infants with CBPP.
- While MRI and EMG provide complementary information, they may not be as consistently predictive as clinical assessments.
- Early and serial assessments are vital for understanding the trajectory of recovery in CBPP.
Abstract:
Thirteen infants with congenital brachial plexus palsy (eight with upper, five with upper and lower) were monitored by magnetic resonance imaging (the first performed between 7 and 41 days of age and the second at 3 months of age), electromyography (the first performed between 27 and 50 days and the second at 3 months), and the muscle scoring system of the Hospital for Sick Children (at 3, 6, and 9 months of age). The findings were evaluated with respect to the clinical status of the patients at 12 months of age. Magnetic resonance imaging, which could be performed readily even in the neonatal period, revealed pseudomeningoceles in two of the five patients with a poor prognosis (in all planes even in the early days after birth) and in two of the eight patients with a good prognosis (more easily visible at 3 months of age). Electromyography implied root avulsion in three of five patients with a poor prognosis. Electromyography can be of great value for patients with a poor prognosis and root avulsion but may underestimate the severity. The muscle scoring system (Hospital for Sick Children) was determined to be the most predictive method for prognosis.