The spleen in the sickling disorders: an update

Area of Science:

• Hematology
• Pediatrics
• Infectious Disease

Background:

• Sickle cell disease (SCD) poses risks of life-threatening bacterial sepsis and splenic sequestration crises due to splenic hypofunction in early life.
• The 1985 penicillin prophylaxis study demonstrated a significant reduction in sepsis-related mortality for young SCD patients.
• Newborn screening and penicillin prophylaxis are standard care for SCD in many regions.

Purpose of the Study:

• To review the historical impact of penicillin prophylaxis on sepsis mortality in pediatric sickle cell disease.
• To discuss emerging evidence challenging the concept of permanent "autosplenectomy" in SCD.
• To highlight advancements in managing splenic dysfunction in SCD patients.

Main Methods:

• Literature review focusing on landmark studies and recent findings in sickle cell disease management.
• Analysis of the impact of penicillin prophylaxis on sepsis mortality.
• Discussion of novel therapeutic strategies and diagnostic imaging for splenic function.

Main Results:

• Penicillin prophylaxis dramatically decreased sepsis mortality in young children with SCD.
• Recent studies indicate that splenic dysfunction in SCD may be reversible.
• Hydroxyurea and allogeneic stem cell transplantation show potential in restoring splenic function, even in older patients.

Conclusions:

• Penicillin prophylaxis remains a cornerstone in preventing sepsis in infants and children with SCD.
• The understanding of splenic involvement in SCD is evolving, with potential for reversibility.
• Advanced treatments and imaging modalities are crucial for optimizing SCD patient management and outcomes.