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Quantitative dysmorphology assessment in Fabry disease.

Markus Ries1, David F Moore, Chevalia J Robinson

  • 1Developmental and Metabolic Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892-1260, USA.

Genetics in Medicine : Official Journal of the American College of Medical Genetics
|February 17, 2006
PubMed
Summary

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This study identifies common facial and physical features in hemizygous patients with Fabry disease, a lysosomal storage disorder. Recognizing these subtle morphologic characteristics can aid in earlier diagnosis and family member identification.

Area of Science:

  • Genetics
  • Biochemistry
  • Medical Diagnostics

Background:

  • Fabry disease is a treatable lysosomal storage disorder due to alpha-galactosidase A deficiency.
  • Morphological abnormalities in Fabry disease have been anecdotally reported but not systematically investigated.
  • A need exists for a standardized method to assess dysmorphic features in Fabry disease patients.

Purpose of the Study:

  • To systematically identify and characterize the morphometric features in hemizygous patients with Fabry disease.
  • To develop a quantitative method for evaluating dysmorphic abnormalities associated with Fabry disease.

Main Methods:

  • A cross-sectional study involving 38 hemizygous Fabry disease patients (mean age 38 years).
  • Independent dysmorphology assessment by three clinical geneticists using standardized medical photography.

Related Experiment Videos

  • Statistical analysis to define core features and assess inter-rater reliability.

    • Main Results:

    • Identified frequent dysmorphic features including periorbital fullness, prominent ear lobules, bushy eyebrows, recessed forehead, and specific extremity findings like broad fingertips and brachydactyly.
    • Ten core morphological features were statistically defined.
    • Inter-rater reliability analysis indicated variability in assessing subtle features (Kappa values 0.08-0.48).

    Conclusions:

    • Patients with Fabry disease exhibit shared morphological characteristics across the face, trunk, and extremities.
    • These subtle features, though variable in assessment, can aid in the diagnosis of Fabry disease.
    • Increased awareness of these features may facilitate early diagnosis and the identification of affected family members.