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Biallelic variants in BRCA1 gene cause a recognisable phenotype within chromosomal instability syndromes reframed as BRCA1 deficiency
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  • Published on:
    Letter to the Editor: “Biallelic variants in BRCA1 gene cause a recognizable phenotype within chromosomal instability syndromes reframed as BRCA1 deficiency”
    • Bruna Lucheze Freire, Research fellow Unidade de Endocrinologia Genética (LIM25), Disciplina de da Faculdade de Medicina da Universidade de São Paulo (FMUSP), Brazil
    • Other Contributors:
      • Thais Kataoka Homma, MD
      • Alexander Augusto de Lima Jorge, Associate Professor

    We appreciate the article by Chirita-Emandi at al (1).
    The authors showed the phenotype of nine patients with biallelic variants at BRCA1 gene associated with Fanconi anemia-like complementation group-S (MIM 617883). As it is a rare syndrome, the publication of articles describing the clinical characteristics and follow-up data are important to improve the knowledge and disseminate evidence-based information.
    In Chirita-Emandi’s article, one patient is first reported and eight are from previous studies. All patients had prenatal and postnatal growth failure, microcephaly, skin pigmentation lesions, facial dysmorphism and cancer family history. Eight presented mild developmental delay, and six had cancer. None presented bone marrow failure or immunodeficiency (1).
    In this letter, we would like to update the clinical case of one of these patients. In a previous article we reported a homozygous loss-of-function BRCA1 mutation in a 2.5-year-old girl with severe short stature, microcephaly, neurodevelopmental delay, congenital heart disease and dysmorphic features (2). At 6 years-old, she evaluated with neurological symptoms and her skull tomography detected an expansive and infiltrative lesion in the encephalic trunk, compressing and displacing the IV ventricle and obliterating the prepontine cistern and the cerebellar angles. The lesion characteristics were suggestive of diffuse astrocytoma. Soon after a decompressive neurological surgery, this child died....

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    Conflict of Interest:
    None declared.