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Examination of Clinical and Laboratory Abnormalities in Patients With Defective DNA Repair: Xeroderma Pigmentosum, Cockayne Syndrome, or Trichothiodystrophy

Skin Neoplasms Clinical Trial

Official title:
Examination of Clinical and Laboratory Abnormalities in Patients With Defective DNA Repair: Xeroderma Pigmentosum, Cockayne Syndrome, or Trichothiodystrophy

Clinical Trial Summary

Four rare genetic diseases, xeroderma pigmentosum (XP), Cockayne syndrome (CS), the XP/CS complex and trichothiodystrophy (TTD) have defective DNA excision repair although only XP has increased cancer susceptibility. We plan to perform careful clinical examination of selected patients with XP, XP/CS, CS, or TTD and follow their clinical course. We will obtain tissue (skin, blood, hair, buccal swabs) for laboratory examination of DNA repair and for genetic analysis. We hope to be able to correlate these laboratory abnormalities with the clinical features to better understand the mechanism of cancer prevention by DNA repair. Patients will be offered counseling and education for cancer control.

Clinical Trial Description

Three rare genetic diseases, xeroderma pigmentosum (XP), Cockayne syndrome (CS), and trichothiodystrophy (TTD) have defective DNA excision repair although only XP has increased cancer susceptibility. We plan to perform careful clinical examination of selected patients with XP, CS, TTD, or overlap syndromes to follow their clinical course. We will obtain tissue (skin, blood, hair, or buccal cells) for laboratory examination of DNA repair and for histologic, protein, biochemical, and genetic analysis. We hope to be able to correlate these laboratory abnormalities with the clinical features to better understand the mechanism of cancer prevention by DNA repair. Patients will be offered counseling and education for cancer control. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT00001813
Study type Observational
Source National Institutes of Health Clinical Center (CC)
Contact
Status Active, not recruiting
Phase
Start date May 10, 1999
View Details
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