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Thalassaemia in the British.

H H Knox-Macaulay, D J Weatherall, J B Clegg

    British Medical Journal
    |July 21, 1973
    PubMed
    Summary

    Beta-thalassaemia and related disorders are present in British populations. These conditions, often overlooked, require broader diagnostic consideration to prevent unnecessary investigations and treatments.

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    Area of Science:

    • Hematology
    • Genetics
    • Public Health

    Background:

    • Thalassaemia and related hemoglobinopathies are traditionally associated with specific ethnic groups.
    • Recent findings indicate the presence of various thalassaemia forms and hereditary persistence of fetal haemoglobin (HPFH) in individuals of British descent.
    • These conditions can be misdiagnosed or overlooked in clinical practice.

    Purpose of the Study:

    • To document the prevalence and characteristics of different thalassaemia types and HPFH in a British population.
    • To highlight the diagnostic challenges and clinical implications of these disorders in non-traditional ethnic groups.
    • To emphasize the importance of considering thalassaemia in the differential diagnosis of anemia, especially during pregnancy.

    Main Methods:

    • Retrospective analysis of clinical, haematological, and haemoglobin biosynthetic data.
    • Identification of individuals with beta-thalassaemia, alpha-thalassaemia, Hb H disease, and HPFH.
    • Case series and family studies.

    Main Results:

    • Identified 116 individuals of British stock with various thalassaemia forms, including homozygous beta-thalassaemia, heterozygous beta-thalassaemia, Hb H disease, alpha-thalassaemia 1, silent beta-thalassaemia, beta-thalassaemia intermedia, and HPFH.
    • Clinical and haematological findings were consistent with those observed in other racial groups.
    • Heterozygous beta-thalassaemia is frequently overlooked in British patients, leading to diagnostic delays and inappropriate management.
    • Multiple variants of HPFH were identified in the British population, posing challenges in prenatal diagnosis and potentially affecting Hb F levels in co-inherited beta-thalassaemia.

    Conclusions:

    • Thalassaemia and related hemoglobinopathies occur in the British population and present similarly to other ethnic groups.
    • The heterozygous state for beta-thalassaemia is underdiagnosed in the UK, necessitating increased awareness and inclusion in differential diagnoses for anemia.
    • HPFH variants are present in British individuals and can complicate the assessment of fetal haemoglobin levels, particularly in conjunction with beta-thalassaemia.

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