A first report of a rare TP53 variant associated with Li-Fraumeni syndrome manifesting as invasive breast cancer and malignant solitary fibrous tumor

Scientific paper - Case study

• Author: Juraj Prejac
• Author: Natalija Dedić Plavetić
• Author: Kristina Gotovac Jerčić
• Author: Fran Borovečki
• Author's institution: University of Zagreb; School of Medicine; (Department of Neurology)
• Author's institution: University of Zagreb; School of Medicine; (Department of Pathophysiology)
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Clinical Medical Sciences; Neurology
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Clinical Medical Sciences; Pathophysiology

Abstract (english)

Background: Li-Fraumeni is a rare autosomal dominant cancer predisposition syndrome. The basis is a germline mutation of TP53 gene which encodes tumor suppressor protein resulting in early onset of tumors, most often breast cancer, soft tissue sarcomas, brain tumors, adrenocortical carcinomas, and leukemia.
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Case report: We present a case of a young woman with a positive family history for cancer diagnosed with malignant solitary fibrous tumor and luminal B-like invasive breast cancer. Breast cancer and sarcomas account for the majority of tumors associated with Li-Fraumeni syndrome, yet solitary fibrous tumor is a rare clinical entity with no established guidelines for treatment. Even though both primary tumors were successfully resected, the sarcoma relapsed in the form of lung metastases. The NGS analysis revealed single nucleotide variant (c.1101-1G>A) in TP53 gene, affecting the acceptor splice site at intron 10. Until now, only one case of this genetic variant has been documented with conflicting interpretations of pathogenicity.
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Conclusions: The knowledge of TP53 mutation status is essential since the management of these patients requires different approach to avoid excessive toxicity due to the risk of developing secondary malignancy. Using the clinical criteria to screen for affected individuals facilitates appropriate early genetic counseling of patients and their families. Following the American College of Medical Genetics criteria, we believe that the reported single nucleotide variant (c.1101-1G>A) in TP53 gene should be considered pathogenic.

• Keywords (english): Adrenal Cortex Neoplasms; Breast Neoplasms / genetics; Female; Genes, p53; Genetic Predisposition to Disease; Humans; Li-Fraumeni Syndrome / genetics; Prognosis; Solitary Fibrous Tumors / genetics; Solitary Fibrous Tumors / surgery; Tumor Suppressor Protein p53 / genetics
• Language: english
• Publication type: Scientific paper - Case study
• Publication status: Published
• Peer review: Peer review
• Publication version: Published version
• Journal title: World Journal of Surgical Oncology
• Numbering: vol. 19, no. 1, 254
• e-ISSN: 1477-7819
• DOI: https://doi.org/10.1186/s12957-021-02370-8
• URN:NBN: urn:nbn:hr:105:880873
• Publication: 2021-08-27
• Document URL: https://wjso.biomedcentral.com/articles/10.1186/s12957-021-02370-8
• Type of resource: Text
• Access conditions: Open access
• Created on: 2022-05-10 07:13:43