[Chronic complications of sickle cell disease]

Area of Science:

• Hematology
• Genetics
• Internal Medicine

Context:

• Sickle cell disease (SCD) is a monogenic disorder with significant systemic impact.
• Chronic complications are increasingly recognized as major contributors to morbidity and mortality in SCD patients.
• Organ damage prevalence and type vary with patient age and specific SCD genotype (e.g., SS vs. SC).

Purpose:

• To highlight the increasing role and variability of chronic complications in sickle cell disease management.
• To differentiate the natural history and pathophysiology of chronic organ damage in SCD.
• To underscore the need for a deeper understanding of SCD complication mechanisms.

Summary:

• Chronic complications affect nearly all organs in sickle cell disease, increasing with patient age.
• Patient phenotypes, such as "hyperhemolytic" in SS patients and hyperviscosity in SC patients, correlate with distinct complication risks (e.g., kidney disease, pulmonary hypertension, retinopathy, osteonecrosis).
• Complication onset varies by type, with cerebral vasculopathy appearing early and kidney damage progressing gradually with age.

Impact:

• Improved understanding of SCD pathophysiology can lead to novel preventive and therapeutic strategies.
• Recognizing age- and phenotype-specific risks can personalize SCD patient management.
• Addressing the broad spectrum of chronic organ damage is essential for improving long-term outcomes in sickle cell disease.