HIV encephalopathy (neonatal)
General description
Approximately 90% of pediatric HIV infections result from mother-to-child transmission, primarily during childbirth, but also through intrauterine exposure and breastfeeding. The natural transmission rate from an untreated HIV-positive mother to her child is estimated to be around 30%. This risk can be significantly reduced with appropriate interventions.
Mother-to-child transmission is a major concern, and if a mother is unaware of her HIV infection, the risk of transmission to the baby is significant. However, if the infection is diagnosed early in pregnancy and appropriate measures are taken, the transmission rate can be reduced to below 1%. These measures include maternal antiretroviral therapy to control viral load, elective cesarean section, and avoidance of breastfeeding. Maternal HIV screening is crucial, especially in regions where access to testing and preventive measures is limited. While infection can be confirmed through PCR testing of the infant's blood, false negatives are possible in the first two weeks of life.
Calcification
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CerebrumFrontal lobeCerebral white matterSubcortical white matter
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Caudate nucleus
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Putamen
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Globus pallidus
The characteristic imaging findings include calcification of the basal ganglia and anterior predominant subcortical white matter.
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Atrophy
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CerebrumFrontal lobe
MRI scans of patients with this condition often show atrophy in the frontal lobes of the brain.
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Aneurysm and stenosis
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Artery
In some cases, MRA and angiography may reveal findings such as aneurysms or vascular stenosis.
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