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Hemoglobinopathies: three illustrative case studies

J C Wang1, J Lafferty, M Ali

  • 1Department of Laboratory Medicine, St. Joseph's Hospital, Hamilton, Ontario.

Clinical and Investigative Medicine. Medecine Clinique Et Experimentale
|October 1, 1994
PubMed
Summary
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Comprehensive hemoglobinopathy screening, family studies, and clinical data are crucial for diagnosing complex blood disorders. These case studies highlight the diagnostic value of these methods in identifying rare hemoglobin variants and conditions like thalassemia.

Area of Science:

  • Hematology
  • Medical Diagnostics
  • Genetics

Background:

  • Hemoglobinopathies are inherited blood disorders affecting hemoglobin structure or synthesis.
  • Accurate diagnosis is essential for patient management and genetic counseling.
  • Complex cases often require advanced diagnostic techniques beyond routine screening.

Observation:

  • Case 1: An elderly woman presented with an unknown hemoglobin variant mimicking Hemoglobin S on electrophoresis.
  • Case 2: A boy of Greek descent exhibited a thalassemic blood profile despite a normal standard hemoglobinopathy screen.
  • Case 3: A 70-year-old man initially had a normal screen but later showed signs of alpha thalassemia.

Findings:

  • A comprehensive hemoglobinopathy screen, including family studies and clinical correlation, successfully resolved complex diagnostic challenges.

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  • The diagnostic approach identified an unknown hemoglobin variant, a masked thalassemic condition, and late-onset alpha thalassemia.
  • These findings underscore the limitations of standard screening in certain complex scenarios.

    • Implications:

    • Highlights the importance of integrated diagnostic approaches for rare and complex hemoglobinopathies.
    • Emphasizes the need for continued vigilance and advanced testing in hematological diagnostics.
    • Suggests that comprehensive evaluation is vital for accurate diagnosis and effective patient care in hemoglobin disorders.