Tareq Abadl/LinkedIn
Sep 27, 2026, 09:03
Tareq Abadl: Hemoglobin Electrophoresis Patterns Across Thalassemia Syndromes
Tareq Abadl, Medical Lab Specialist, shared a post on LinkedIn:
“Thalassemia – Hemoglobin Analysis.
Know the Pattern, Know the Diagnosis.
- β-Thalassemia Trait
- HbA: Predominant
- HbA₂: high Increased
- HbF: Normal or mildly high
Key clue:
Microcytosis plus high HbA₂ – Think β-thalassemia trait.
β-Thalassemia Major
- HbA: Absent or markedly low
- HbF: Predominant high
- HbA₂: Variable
Severe reduction/absence of β-globin production – marked increase in HbF.
α-Thalassemia Trait
In adults:
- HbA: Predominant
- HbA₂: Normal or slightly low
- HbF: Normal
Important: Hemoglobin electrophoresis may be normal in α-thalassemia trait.
HbH Disease
- HbH (β₄): May be detected
- HbA: Predominant
- HbA₂: low
- HbF: Usually normal or slightly high
Peripheral smear may show HbH inclusions with supravital staining.
ASCP Pearl
High HbA₂ is a classic laboratory clue for β-thalassemia trait.
But remember: Normal electrophoresis ≠ No thalassemia – α-thalassemia trait can have a normal adult hemoglobin pattern.
Quick Memory
- β-thal trait – HbA₂ high
- β-thal major – HbF high
- α-thal trait – Electrophoresis often normal
- HbH disease – HbH (β₄).”

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