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Retinal hemorrhage asymmetry in inflicted head injury: a clue to pathogenesis?
Elizabeth E Gilles1, Mary Lou McGregor, Grace Levy-Clarke
1Departments of Pediatrics and Neurology, Division of Pediatric Neurology, MMC 486, 420 Delaware Street SE, University of Minnesota, MN 55455, USA. gille037@tc.umn.edu
Insights
Retinal hemorrhages in inflicted head injury correlate with brain injury patterns. Asymmetry in retinal hemorrhages often indicates the side with the most severe cerebral injury in children.
Area of Science:
- Neuroscience
- Ophthalmology
- Pediatric Traumatology
Background:
- Inflicted head injury in children can cause severe neurological damage.
- Retinal hemorrhages are a common finding in abusive head trauma.
- Understanding the correlation between brain injury and retinal findings is crucial for diagnosis.
Purpose of the Study:
- To investigate the relationship between regional patterns of cerebral parenchymal injury and the distribution of retinal hemorrhages.
- To determine if brain injury patterns can predict the location of retinal hemorrhages in inflicted head injuries.
Main Methods:
- Retrospective case series of 14 children with confirmed inflicted head injury.
- Analysis of funduscopic photographs and serial computerized tomographic (CT) imaging.
- Assessment of Retinal Hemorrhage Score, visual fields, and CT/necropsy findings.
Main Results:
- Retinal hemorrhages were present in 71% of children, predominantly asymmetric (90%).
- Maximal retinal hemorrhages often occurred on the side of greatest cerebral injury.
- Imaging asymmetry predicted retinal hemorrhage distribution in survivors; early ophthalmoscopy improved asymmetry detection.
Conclusions:
- The distribution of retinal hemorrhages correlates with acute and evolving regional cerebral parenchymal injury patterns in inflicted head injuries.
- This correlation aids in understanding the pathophysiology and diagnosis of abusive head trauma.
Objective:
To determine whether regional cerebral parenchymal injury patterns correlate with the distribution of retinal hemorrhages after inflicted head injury.
Study Design:
Retrospective case series of funduscopic photographs and serial computerized tomographic imaging of 14 children with confirmed inflicted head injury.
Main Outcome Measures:
Retinal Hemorrhage Score per eye and per subject, visual field examination, regional patterns of parenchymal injury on computerized tomographic scans and necropsy, and retinal/optic nerve sheath hemorrhage distribution at necropsy.
Results:
Ten of 14 children had retinal hemorrhages (71%); 90% were asymmetric (mean retinal score, 4.89 vs 2.56; P=.006). Retinal hemorrhages were maximal on the side of greatest cerebral injury in seven of 10 children initially. Subsequent imaging asymmetry predicted retinal hemorrhage distribution in all eight survivors. Children's Coma Scores, apnea or cardiorespiratory arrest, initial hemoglobin, and plasma glucose concentration did not predict laterality. Asymmetry was greatest if dilated ophthalmoscopy was performed during the first 24 hours (P=.03). Visual outcome was poor; three had homonymous hemianopia and four had cortical visual loss, all correlating with parenchymal atrophy patterns.
Conclusion:
The distribution of retinal hemorrhages after inflicted head injury correlates with acute and evolving regional cerebral parenchymal injury patterns.
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