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[Trichothiodystrophy].

J Meynadier1, B Guillot, G Barnéon

  • 1Service de Dermatologie, Hôpital Saint-Charles, Montpellier.

Annales De Dermatologie Et De Venereologie
|January 1, 1987
PubMed
Summary
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Trichothiodystrophy is a rare genetic disorder affecting hair, nails, teeth, and eyes. This condition often involves neuroectodermal abnormalities and intellectual deficits, suggesting a broader spectrum of related syndromes.

Area of Science:

  • Genetics
  • Dermatology
  • Pediatrics

Background:

  • Trichothiodystrophy (TTD) is a congenital hair dysplasia characterized by specific hair shaft abnormalities and sulfur amino acid deficiency.
  • It presents with a pathognomonic polarized light image and trichoschisis.

Observation:

  • A case of TTD is presented with associated nail, teeth, and eye abnormalities, growth and mental retardation, neurological syndrome, and hypogonadism.
  • Congenital neuroectodermal abnormalities are frequent, including skin lesions (ichthyosis, photosensitivity), ungueal dysplasia, dysmorphic features, intellectual and growth deficits, hypogonadism, and neurological/ophthalmic issues.

Findings:

  • TTD appears to be inherited as an autosomal recessive trait.
  • A unifying feature of dysplasia allows classification of various syndromes (Brown, BIDS, IBIDS, PIBIDS, Tay, Siemens, Marviesco-Sjögren) under the TTD spectrum, highlighting shared characteristics.

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Implications:

  • Recognizing the broad spectrum of TTD and related syndromes is crucial for accurate diagnosis and management.
  • Further research into the genetic basis and clinical manifestations of TTD can improve understanding of neuroectodermal development and related disorders.