J Med Genet. 2009 May;46(5):341-4. Epub 2009 Mar 5.

Predictive diagnosis of the cancer prone Li-Fraumeni syndrome by accident: new challenges through whole genome array testing.

Schwarzbraun T, Obenauf AC, Langmann A, Gruber-Sedlmayr U, Wagner K, Speicher MR, Kroisel PM.

Abstract

BACKGROUND:

Li-Fraumeni syndrome greatly increases the risk of developing several types of cancer and is usually caused by TP53 germline mutations. Predictive testing of at-risk family members is only offered after a complex genetic counselling process. Recently the clinical implementation of array comparative genomic hybridisation (CGH) has revolutionised the diagnosis of patients with syndromic or non-syndromic mental retardation and has evolved to a routinely performed high resolution whole genome scan.

METHODS AND RESULTS:

When using array CGH to identify the cause for mental retardation in a 7-year-old child we found a submicroscopic de novo deletion of chromosome 17p13.1, which includes several genes likely to be causative for her phenotype, and also of TP53.

CONCLUSION:

Thus, array CGH resulted in an unintended predictive diagnosis of an increased tumour susceptibility as observed in Li-Fraumeni syndrome.

Comment in

J Med Genet. 2009 Jul;46(7):495-6.

PMID:: 19269943; [PubMed - indexed for MEDLINE]
PMCID:: PMC2669880

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Predictive diagnosis of the cancer prone Li-Fraumeni syndrome by accident: new challenges through whole genome array testing.

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