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Germline p53 mutation presenting as synchronous tumors.

Mary Ellen Cavalier1, Mary M Davis, James M Croop

  • 1Indiana University School of Medicine, Division of Pediatric Hematology/Oncology, Indianapolis, IN 46202, USA. mecavali@iupui.edu

Journal of Pediatric Hematology/Oncology
|August 13, 2005
PubMed
Summary

Li-Fraumeni syndrome, a rare inherited cancer predisposition, is linked to tumor suppressor gene p53 mutations. A boy with rhabdomyosarcoma and adrenal cortical carcinoma had a novel p53 mutation at codon 273 (R273H).

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Area of Science:

  • Oncology
  • Genetics
  • Molecular Biology

Background:

  • Li-Fraumeni syndrome (LFS) and Li-Fraumeni-like syndrome (LFLS) are rare, inherited cancer predisposition syndromes.
  • These syndromes are characterized by germline mutations in the tumor suppressor gene p53.
  • Early-onset malignancies are common in affected individuals.

Observation:

  • A 14-month-old boy presented with synchronous rhabdomyosarcoma and adrenal cortical carcinoma.
  • Genetic analysis was performed to investigate potential underlying causes.
  • The patient's tumor samples were analyzed for mutations in the p53 gene.

Findings:

  • A novel mutation in the p53 gene was identified in the patient.
  • Polymerase chain reaction and DNA sequencing revealed a mutation at codon 273.

Related Experiment Videos

  • Specifically, the mutation was identified as R273H, a known hotspot for p53 mutations.

    • Implications:

    • The R273H mutation at codon 273 of p53 has not previously been associated with adrenal cortical carcinoma.
    • This finding expands the spectrum of clinical presentations associated with p53 mutations.
    • Further research is needed to understand the specific oncogenic mechanisms of the R273H mutation in adrenal tumorigenesis.