PALB2 germline mutations in a multi-gene panel testing cohort of 1905 breast-ovarian cancer patients in Argentina.
Breast Cancer Res Treat
; 194(2): 403-412, 2022 Jul.
Article
em En
| MEDLINE
| ID: mdl-35610400
ABSTRACT
PURPOSE:
PALB2 variants have been scarcely described in Argentinian and Latin-American reports. In this study, we describe molecular and clinical characteristics of PALB2 mutations found in multi-gene panels (MP) from breast-ovarian cancer (BOC) families in different institutions from Argentina.METHODS:
We retrospectively identified PALB2 pathogenic (PV) and likely pathogenic (LPV) variants from a cohort of 1905 MP results, provided by one local lab (Heritas) and SITHER (Hereditary Tumor Information System) public database. All patients met hereditary BOC clinical criteria for testing, according to current guidelines.RESULTS:
The frequency of PALB2 mutations is 2.78% (53/1905). Forty-eight (90.5%) are PV and five (9.5%) are LPV. Most of the 18 different mutations (89%) are nonsense and frameshift types and 2 variants are novel. One high-rate recurrent PV (Y551*) is present in 43% (23/53) of the unrelated index cases. From the 53 affected carriers, 94% have BC diagnosis with 14% of bilateral cases. BC phenotype is mainly invasive ductal (78%) with 62% of hormone-receptor positive and 22% of triple negative tumors. Self-reported ethnic background of the cohort is West European (66%) and native Latin-American (20%) which is representative of Buenos Aires and other big urban areas of the country.CONCLUSION:
This is the first report describing molecular and clinical characteristics of PALB2 carriers in Argentina. Frequency of PALB2 PV in Argentinian HBOC families is higher than in other reported populations. Y551* is a recurrent mutation that seems to be responsible for almost 50% of PALB2 cases.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Neoplasias Ovarianas
/
Neoplasias da Mama
Tipo de estudo:
Guideline
/
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Female
/
Humans
País/Região como assunto:
America do sul
/
Argentina
Idioma:
En
Revista:
Breast Cancer Res Treat
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
Argentina