Multiple primary tumors in a family with Li-Fraumeni syndrome with a TP53 germline mutation identified by next-generation sequencing.
Int J Biol Markers
; 31(4): e461-e465, 2016 Dec 23.
Article
en En
| MEDLINE
| ID: mdl-27516001
ABSTRACT
Li-Fraumeni syndrome (LFS) is an autosomal dominant disorder occurring at a young age that predisposes individuals to multiple forms of cancer and to a heterogeneous spectrum of malignancies. We describe the clinical history of a patient who had 5 primary malignant cancers and a familiar history consistent with LFS. We analyzed the genomic DNA of the proband and her relatives by next-generation sequencing (NGS) technology using an enrichment protocol for the simultaneous sequencing of 94 genes involved in hereditary cancers. Genetic analysis of the proband revealed a TP53 germline mutation in exon 5 determining a nucleotide alteration at codon 175 (R175H), a hot spot mutation site related to LFS and a reported pathogenic mutation. The proband daughter's and brother's DNA did not carry the TP53 mutation but they had some rare variants in common with the proband, in addition to other variants with a still unclear role. In conclusion, we identified a TP53 mutation in a patient with multiple primary tumors and a family history characterized by a severe susceptibility to cancer. The genetic analysis by targeted NGS led to the identification of the genetic background and to the exclusion of a cancer risk for the family members. Targeted NGS represents an efficient approach for the identification of mutations in families with a heterogeneous phenotype.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Proteína p53 Supresora de Tumor
/
Síndrome de Li-Fraumeni
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Mutación de Línea Germinal
Tipo de estudio:
Guideline
/
Prognostic_studies
Límite:
Adult
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Female
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Humans
Idioma:
En
Revista:
Int J Biol Markers
Asunto de la revista:
BIOQUIMICA
/
NEOPLASIAS
Año:
2016
Tipo del documento:
Article