Hemoglobin Electrophoresis Timing for Thalassemia Diagnosis in Infants

Optimal Timing for Definitive Diagnosis

• The American Academy of Pediatrics and other medical organizations imply that hemoglobin patterns stabilize by 6 months of age, making this the preferred time for definitive thalassemia diagnosis using hemoglobin electrophoresis, with age-specific reference ranges essential for accurate interpretation in children under 1 year 1, 2
• The Centers for Disease Control and Prevention recommends using high-performance liquid chromatography (HPLC) or microcolumn chromatography for precise Hb A2 measurement, and applying age-appropriate reference ranges specific to the analyzer and reagent system used 1, 2

Critical Pitfalls to Avoid

• The International Society on Thrombosis and Haemostasis suggests never interpreting hemoglobin electrophoresis results in infants <6 months using adult reference ranges, to avoid misdiagnosis 1, 2
• The Centers for Disease Control and Prevention recommends avoiding misdiagnosis by recognizing that low MCV with normal or elevated ferritin suggests thalassemia rather than iron deficiency, and using RDW to differentiate: low MCV with RDW >14% suggests iron deficiency, while RDW ≤14% suggests thalassemia minor 3