Abstract
Li–Fraumeni syndrome (LFS) is a rare genetic disease with a highly significant predisposition to multiple early-onset neoplasms. These neoplasms include adrenocortical carcinoma, sarcoma, leukemia and CNS tumors in children and sarcoma, breast cancer and lung cancer in adults. LFS is inherited in an autosomal dominant manner. In most patients germline mutations in the tumor suppressor gene TP53 are found. As the majority of known mutations affect the DNA-binding domain of the p53 protein, there are only a few case reports showing the clinical presentation of mutations outside of this mutational hotspot. Here we present a family with a typical LFS pedigree with patients suffering from early-onset lung cancer, bilateral breast cancer and osteosarcoma. TP53 sequence analysis of the index patient revealed the germline mutation c.1025G > C in a heterozygous state, resulting in an amino acid exchange from arginine to proline (p.Arg342Pro) in the tetramerization domain of p53. Using DNA from an old bedside blood typing test, the same mutation was found in the mother of the index patient, who had died of breast cancer 29 years ago. In conclusion, we provide evidence for the co-segregation of a TP53 tetramerization domain mutation and cancer phenotypes, but also report pre-symptomatic mutation carriers within the family. We review published recommendations for clinical management and surveillance of high-risk members in Li–Fraumeni kindreds.
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Acknowledgments
The authors wish to thank the patient’s family for consent to share their case with the scientific community. This study was supported by the FAZIT-STIFTUNG Gemeinnützige Verlagsgesellschaft mbH. We thank Prof. Dr. Susann Schweiger and Dr. Dennis Strand for careful and critical reading of the manuscript.
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The authors declare that they have no conflict of interest.
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All patients gave their informed consent prior to their inclusion in that report. Molecular genetic testing was performed as a clinical service according to the ethical guidelines of the institution (University Medical Center Mainz).
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Anna Etzold and Julia C. Schröder have contributed equally to this work.
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Etzold, A., Schröder, J.C., Bartsch, O. et al. Further evidence for pathogenicity of the TP53 tetramerization domain mutation p.Arg342Pro in Li–Fraumeni syndrome. Familial Cancer 14, 161–165 (2015). https://doi.org/10.1007/s10689-014-9754-z
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DOI: https://doi.org/10.1007/s10689-014-9754-z