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Updated: Mar 8, 2026
Early Pathological and Magnetic Resonance Detection of Cerebral Injury Using a Rat Model of Neonatal Hypoxic Ischemic Encephalopathy
Published on: October 28, 2022
Restricted diffusion in the corpus callosum: A neuroradiological marker in hypoxic-ischemic encephalopathy
Alok Kale1, Priscilla Joshi1, A B Kelkar1
1Department of Radiodiagnosis and Imaging, Bharati Hospital and Research Center, Pune, Maharashtra, India.
Background:
Restricted diffusion within the splenium of the corpus callosum has been described by other authors in various conditions, however, restricted diffusion in the entire corpus callosum or isolated involvement of the splenium, genu, or body has been infrequently reported on magnetic resonance imaging (MRI) in neonatal hypoxic-ischemic encephalopathy. We report a series of cases showing different patterns of involvement.
Methods And Materials:
Perinatal imaging with MRI including diffusion-weighted imaging was performed in 40 neonates with hypoxic-ischemic encephalopathy, including 11 premature neonates. Sixteen out of 40 patients demonstrated restricted diffusion within the corpus callosum. Out of 16 patients, 9 showed restricted diffusion in the entire corpus callosum, 4 had isolated splenium involvement, 2 had body and splenium signal abnormality, and 1 showed diffusion restriction only in the genu.
Conclusions:
Changes in the corpus callosum were also associated with more severe clinical presentation of encephalopathy. Restricted diffusion within the corpus callosum in infants with hypoxic-ischemic encephalopathy is often associated with extensive brain injury and appears to be an early neuroradiologic marker of adverse neurologic outcome.
Insights
Restricted diffusion in the corpus callosum on MRI is uncommon in neonatal hypoxic-ischemic encephalopathy. This finding, particularly involving the entire corpus callosum, indicates extensive brain injury and predicts poor neurologic outcomes.
Area of Science:
- Neuroimaging
- Pediatric Neurology
- Neonatal Medicine
Background:
- Restricted diffusion in the corpus callosum is infrequently reported in neonatal hypoxic-ischemic encephalopathy (HIE).
- Previous reports often focused on specific regions like the splenium.
- This study explores diverse patterns of corpus callosum involvement in HIE.
Purpose of the Study:
- To describe various patterns of corpus callosum involvement in neonates with HIE using MRI.
- To correlate these imaging findings with clinical presentation and outcomes.
Main Methods:
- Retrospective analysis of 40 neonates with HIE who underwent MRI with diffusion-weighted imaging.
- Detailed assessment of corpus callosum involvement, including location and extent.
- Correlation with clinical severity and neurological outcomes.
Main Results:
- Sixteen out of 40 neonates (40%) showed restricted diffusion in the corpus callosum.
- Patterns included entire corpus callosum involvement (9/16), isolated splenium (4/16), body and splenium (2/16), and genu (1/16).
- Corpus callosum changes were associated with more severe clinical encephalopathy.
Conclusions:
- Restricted diffusion in the corpus callosum is an important finding in neonatal HIE.
- It signifies extensive brain injury and serves as an early neuroradiologic marker of adverse neurologic outcomes.
- Recognizing these patterns aids in prognostication for affected neonates.
