
BRCA 1/BRCA 2 PATHOGENIC/LIKELY PATHOGENIC
VARIANT PATIENTS WITH BREAST, OVARIAN,
AND OTHER CANCERS Osman K.1,*, Ahmet K.2, Hilmi T.3, İlker N.O.4, Ercan Ö.5, Devrim Ç.5, Murat S.1, Emre Ç.6,
İlhan H.6, Mustafa G.7, Yüksel Ü.7, Bahiddin Y.8, Cihan E.9, Mehmet Ali N. Ş.9, Emrah E.10,
Umut D.10, Zeynep O.11, Mehmet Ali K.12, Ali G.2, İvo G.2, Erkan Ö.2, Muhammet B. H.2,
Bülent E.2, Selma D.12, Sernaz U.2, Mahmut G.4, Hakan G.12, İrfan Ç.2 *Corresponding Author: Assoc. Prof. Osman Köstek, MD, Marmara University, School of Medicine,
Department of Medical Oncology Address: Marmara University, Basıbuyuk Campus, Maltepe,
Istanbul, Turkey. Email: osmankostek@hotmail.com, Telephone: +90 554 585 73 90 page: 5
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INTRODUCTION
Every cell has DNA damage response mechanisms that
protect the genome against the harmful effects of mutations.
DNA double-strand breaks are a very dangerous form of DNA
damage and can be repaired by homologous recombination
repair which includes the breast cancer susceptibility genes
BRCA1 and BRCA2. These genes act as a tumor suppressor to
promote homologous recombination repair mechanism and
their inherited mutations result in homologous recombination
repair deficiency and leading to confer significant lifetime
risks of breast, ovarian, and other cancers [1].
BRCA-related hereditary breast, ovarian and other cancers
have inherited an autosomal dominant condition, for
which early identification and intervention have meaningful
potential for clinical actionability and a positive impact
on public health. In routine practice, genetic testing for
these conditions is based on family history and other demographic
characteristics [2, 3]. Genetic counseling should
be given to the patients with BRCA 1/BRCA 2 carriers and
other family members. Due to the fact that BRCA-related
cancers are diagnosed at an earlier age than non-BRCA 1/
BRCA 2 carriers, earlier screening program protocols are
recommended. On the other hand, there is not enough data
on whether the diagnosis age of BRCA 1/BRCA 2 pathogenic/
likely pathogenic variant patients is different than
their parents who had BRCA 1/BRCA 2 carriers with cancer.
In this study, we aimed to demonstrate the clinical
and demographic findings of the patients who harbor
BRCA 1/BRCA 2 pathogenic/likely pathogenic variants
with breast, genital tract, prostate, and pancreas cancer in
Turkish patients.
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