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Living with Beta-thalassemia major

A severe form of beta thalassemia that starts early and needs regular red blood cell transfusions.

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Understanding Beta-thalassemia major

Beta-thalassemia major is a severe, early-onset form of beta thalassemia with anemia that needs regular red blood cell transfusions.

Signs begin in newborns and infants. Features can include slow growth, feeding trouble, an enlarged liver and spleen, and bone changes. GARD lists many blood test findings, such as small, pale red blood cells.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Low red blood cells (anemia)
  • Enlarged liver and spleen
  • Slow weight gain in infancy
  • Feeding difficulties
  • Growth delay
  • Bone changes and thin bones (osteoporosis)

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include blood and bone marrow specialists, genetic specialists, hormone specialists and kidney specialists.

  3. Consider genetic testing

    Changes in HBB are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    Cooley's Anemia Foundation and Pituitary Network Association may keep lists of experts for this condition.

Care & treatment

Care team
Blood and bone marrow specialists (hematologists); Genetic specialists (geneticists); Hormone specialists (endocrinologists); Kidney specialists (nephrologists)
Expert care
Expert lists: Cooley's Anemia Foundation, Pituitary Network Association
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Cooley's Anemia Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Can HBB gene testing tell us more about my child's type?
How often are transfusions needed, and how do we watch for iron buildup?
Which specialists should follow growth, bones, and hormones?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Recessive
GenesHBB

Changes in the HBB gene cause this condition. It is autosomal recessive, which means a child inherits a changed copy of the gene from each parent.

GeneticKidneyEndocrineBlood

Also known as: beta thalassemia major; cooley anaemia; cooley anemia; cooley's anaemia; homozygous beta thalassemia; homozygous thalassemia

Patient organizations

Source: NIH GARD · Beta-thalassemia majorGARD ID 17162 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

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Explore research for Beta-thalassemia major

Explore actively recruiting Beta-thalassemia major studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Beta-thalassemia major with HealthSpark. Share your city to explore research near you.

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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