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Related Experiment Videos

X-linked recessive ichthyosis.

Carole Hazan1, Seth J Orlow, Julie V Schaffer

  • 1Department of Dermatology, New York University School of Medicine, USA.

Dermatology Online Journal
|January 13, 2006
PubMed
Summary
This summary is machine-generated.

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X-linked recessive ichthyosis (XLI) is a genetic skin disorder characterized by dry, scaling skin. Diagnosis in a young boy was confirmed by clinical presentation and family history, highlighting steroid sulfatase deficiency.

Area of Science:

  • Genetics
  • Dermatology
  • Biochemistry

Background:

  • X-linked recessive ichthyosis (XLI) is a rare genetic disorder.
  • It is caused by mutations in the steroid sulfatase (STS) gene located on the X chromosome.
  • Ichthyosis is a group of skin conditions characterized by dry, thickened, scaly skin.

Observation:

  • A 13-year-old male presented with lifelong, adherent, brown, polygonal scales on extensor surfaces, trunk, and neck.
  • A similar condition was noted in his male maternal relatives.
  • Clinical presentation and family history were key to diagnosis.

Findings:

  • The patient was diagnosed with X-linked recessive ichthyosis (XLI).
  • Underlying the condition is steroid sulfatase (STS) deficiency.

Related Experiment Videos

  • Associated systemic manifestations include cryptorchidism and asymptomatic corneal opacities.

    • Implications:

    • Most XLI cases result from deletions in the STS gene.
    • Deletions may extend to neighboring genes, causing contiguous gene syndromes.
    • Understanding STS deficiency is crucial for diagnosing and managing XLI and related disorders.