Cortical laminar abnormalities--occurrence and clinical significance

Area of Science:

• Neurology
• Pediatric Radiology
• Neuroimaging

Background:

• Cortical laminar necrosis is a histopathological finding associated with cerebral energy depletion.
• Clinical manifestations include motor deficits, intellectual decline, and epilepsy.
• The study investigates MRI-detected cortical laminar abnormalities as potential indicators of this condition.

Purpose of the Study:

• To evaluate the causes and clinical consequences of cortical laminar abnormalities on MRI in children.
• To find indirect evidence supporting the hypothesis that these abnormalities represent cortical laminar necrosis.
• To explore associations with cerebral energy depletion, white matter damage, and clinical outcomes.

Main Methods:

• A study of 45 children with cortical laminar abnormalities on MRI.
• Comparison with two control groups: 40 children with white matter abnormalities and 53 children with no MRI abnormalities.
• Data collection included medical history, clinical status, and final diagnoses.

Main Results:

• Cortical laminar abnormalities on MRI are strongly associated with a history of cerebral energy depletion (e.g., hypoxia-ischemia).
• These abnormalities occur more frequently in term neonates and older children, unlike white matter damage often seen in premature infants.
• Cortical laminar abnormalities increased spasticity risk in children without white matter damage, but not in those with existing white matter lesions.

Conclusions:

• MRI-detected cortical laminar abnormalities in children are linked to cerebral energy depletion events.
• These abnormalities are associated with an increased risk of spasticity, particularly when white matter damage is not present.
• No association was found between these MRI findings and epilepsy or psychomotor retardation.