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Case Report| Volume 256, P127-130, August 2021

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A hereditary ovarian cancer family with rare pathogenic splicing mutation: Implications for variant interpretation

  • Author Footnotes
    1 These authors contributed equally to this work.
    Ke Wang
    Correspondence
    Corresponding authors.
    Footnotes
    1 These authors contributed equally to this work.
    Affiliations
    Gynecological Oncology Department, National Clinical Research Center of Caner, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute & Hospital, Tianjin, P R China
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  • Author Footnotes
    1 These authors contributed equally to this work.
    Yingnan Ye
    Footnotes
    1 These authors contributed equally to this work.
    Affiliations
    Cancer Molecular Diagnostics Core, National Clinical Research Center of Caner, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer Tianjin Medical University Cancer Institute & Hospital, Tianjin, P R China
    Search for articles by this author
  • Lewen Bao
    Affiliations
    Gynecological Oncology Department, National Clinical Research Center of Caner, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute & Hospital, Tianjin, P R China
    Search for articles by this author
  • Yanan Cheng
    Affiliations
    Cancer Molecular Diagnostics Core, National Clinical Research Center of Caner, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer Tianjin Medical University Cancer Institute & Hospital, Tianjin, P R China
    Search for articles by this author
  • Yandong Cao
    Affiliations
    Analyses Technology Co. Ltd., Beijing, P R China
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  • Jinpu Yu
    Correspondence
    Corresponding authors.
    Affiliations
    Cancer Molecular Diagnostics Core, National Clinical Research Center of Caner, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer Tianjin Medical University Cancer Institute & Hospital, Tianjin, P R China
    Search for articles by this author
  • Author Footnotes
    1 These authors contributed equally to this work.

      Highlights

      • Rare pathogenic splicing mutation in BRCA1 gene.
      • A rare pathogenic splicing mutation found in FHOCs family.

      Abstract

      The BRCA1/2 gene is important for assessing the risk of familial/hereditary ovarian cancer (OC). This case is a patient with OC, and two of her immediate family members are cancer patients. We sequenced the coding and splicing regions of 42 OC susceptibility genes, and found a rare pathogenic splicing mutation BRCA1:c.132C > T (p.cys44 =) in 2 patients. Although the mutation is synonymous, software prediction and functional verification have shown that it affects alternative splicing and leads to frameshift mutations (c.131_134del). Chromosome microarray analysis of the tissue samples revealed the presence of a BRCA1 gene deletion with a fragment size of 1.42 Mb and an HRD score of 71. In addition, the proband showed a sensitive response to platinum treatment. This case suggests the clinical significance of OC susceptibility genes sequencing and HRD scoring in screening hereditary OC families.

      Keywords

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