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Disease Atlas / Disease detail

Sickle cell disease

An evidence-led atlas of hemoglobin polymerization, vaso-occlusion, lifelong care, transplantation, and approved gene therapies.

sickle cell disease · sickle cell disorder · SCD

MONDO:0011382Public QA completeSource-bound · 4

Disease at a glance

Start with the essentials, then explore the patient and research views.

Public revision · 12e31b4a8530

Disease class
Sickle cell disease is a group of inherited blood disorders in which HBB variants produce abnormal hemoglobin.
Core mechanism
When sickle hemoglobin polymerizes under deoxygenated conditions, red cells become rigid and deformable into a sickled shape.
Genes or cause
Hemolysis and microvascular obstruction contribute to chronic anemia, pain episodes, and injury across multiple organs.
Typical features
Pain, fatigue, infection susceptibility, acute chest syndrome, and cerebrovascular or kidney complications vary by age and individual.
Variability
Even with the same genotype, symptom frequency and organ injury can differ with environment, access to care, and other modifiers.
Diagnosis
Diagnosis is established through newborn screening or hemoglobin analysis, with genetic testing used when genotype clarification is needed.
Management
Routine management links vaccination and infection prevention, pain planning, organ-complication screening, and specialist hematology follow-up.
Treatment and research
Hydroxyurea, transfusion therapy, and hematopoietic stem-cell transplantation have different goals, benefits, risks, and eligible populations.
Reading evidence
Treatment outcomes require consideration of pain events, organ function, hospitalization, quality of life, and treatment burden.
Key caution
Chronic hemolysis and recurrent vaso-occlusion can lead to multi-organ complications over time, making long-term follow-up important.

For patients and families

A structured guide for understanding the disease and preparing for clinical conversations.

At a glance

Sickle cell disease is a group of inherited blood disorders in which HBB variants produce abnormal hemoglobin.

Pain, fatigue, infection susceptibility, acute chest syndrome, and cerebrovascular or kidney complications vary by age and individual.

How the disease works

When sickle hemoglobin polymerizes under deoxygenated conditions, red cells become rigid and deformable into a sickled shape.

Hemolysis and microvascular obstruction contribute to chronic anemia, pain episodes, and injury across multiple organs.

Why experiences vary

Even with the same genotype, symptom frequency and organ injury can differ with environment, access to care, and other modifiers.

Diagnosis and management

Diagnosis is established through newborn screening or hemoglobin analysis, with genetic testing used when genotype clarification is needed.

Treatment status

Routine management links vaccination and infection prevention, pain planning, organ-complication screening, and specialist hematology follow-up.

Hydroxyurea, transfusion therapy, and hematopoietic stem-cell transplantation have different goals, benefits, risks, and eligible populations.

Reading clinical trials

Gene-therapy studies evaluate reduction in vaso-occlusive events alongside durability, conditioning toxicity, and secondary malignancy risk.

Topics for a clinical visit

Clinical discussions distinguish current complication risk, treatment goals, eligibility for transfusion, transplant, or gene therapy, and long-term follow-up burden.

Medical notice

This material is for disease education and is not a personal diagnosis or treatment instruction.

Evidence and sources

A trial registry status does not establish efficacy or regulatory approval.