Alpha thalassemia minor
ICD-10 D56.3 · ICD-11 3A50.00

Treatment of Alpha Thalassemia Minor After Transfusion Fails to Maintain Haemoglobin Targets in Alpha-Thalassaemia Major (Haemoglobin Bart's Hydrops Foetalis)

Infants with alpha-thalassaemia major (haemoglobin Bart's hydrops foetalis) who survive the neonatal period become lifelong transfusion-dependent unless cured by haematopoietic stem cell transplantation. This protocol addresses the management step that follows when regular transfusion has not achieved the required haemoglobin target.

Clinical Scenario

Alpha thalassemia minor in a patient with alpha-thalassaemia major (haemoglobin Bart's hydrops foetalis) — a severe form requiring ongoing haematological intervention from early infancy.

Previous Treatment Line & Failure Condition

Regular blood transfusion was the first-line approach, aiming to maintain functional haemoglobin (non-HbH haemoglobin) above 90 g/L. Escalation to this protocol is indicated when functional haemoglobin has not been maintained above that threshold.

Next Step: Treatment Approach

The protocol centres on initiation of iron chelation therapy, started in early infancy with careful monitoring for toxicity. The specific choice of chelating agent, the schedule, and any combined approach are set out in the full structured protocol.

Clinical goal: Maintain liver iron concentration below 7 mg/g dry weight — ideally between 2 and 5 mg/g dry weight.
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References

  1. Once an infant with α-thalassaemia major (haemoglobin Bart's hydrops foetalis) survives the neonatal period, they will become lifelong transfusion-dependent, unless they are cured by haematopoietic stem cell transplantation.
  2. Iron chelation is started at approximately one year of age, with careful monitoring for toxicities.
  3. The goal of chelation is to maintain liver iron concentration to < 7 mg/g of dry weight, and ideally between 2–5 mg/g dry weight, measured through magnetic resonance imaging (MRI).
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