Effect of transfusion therapy on cerebral vasculopathy in children with sickle-cell anemia

Area of Science:

• Neurology
• Hematology
• Pediatrics

Background:

• Cerebrovascular complications are a significant concern in children with homozygous sickle-cell anemia (HbSS).
• Abnormalities on Magnetic Resonance Angiography (MRA) and Magnetic Resonance Imaging (MRI) are common in this population.
• Transfusional exchange therapy is a standard treatment to prevent stroke in HbSS patients.

Purpose of the Study:

• To evaluate the long-term impact of transfusional exchange therapy on MRA/MRI abnormalities in children with HbSS.
• To identify factors associated with improvement or lack of improvement in cerebrovasculopathy.

Main Methods:

• Retrospective analysis of MRA/MRI data from 24 children with HbSS and abnormal baseline MRA.
• Median follow-up duration of 29 months.
• Assessment of changes in cerebrovascular lesions and stenosis.

Main Results:

• Follow-up MRAs revealed improvement in 11, stabilization in 6, and worsening in 7 patients.
• Complete MRA normalization occurred in 6 patients within 1.4 years; however, stenosis recurred upon discontinuation of therapy.
• Severe baseline stenosis/occlusion and moyamoya syndrome were linked to a lack of improvement.

Conclusions:

• The course of cerebrovasculopathy in HbSS children on chronic transfusion therapy is heterogeneous.
• Individualized therapeutic approaches may be necessary based on distinct evolutive patterns.
• Further research is warranted to optimize treatment strategies for different patient subgroups.