Based on highly similar founder variant spectra of the <i>BRCA1</i> in Poland and Latvia, we decided to test the frequency of other common variants of moderate breast cancer risk - c.509_510delGA (rs515726124) and c.172_175delTTGT (rs180177143) of the <i>PALB2</i> gene and c.1667_1667+3delAGTA variant of the <i>RECQL</i> gene in a breast cancer case-control series from Latvia to better understand the role of genes in susceptibility to breast cancer and their clinical significance.
Targeted-sequencing identified two frameshift deletions: PALB2:c.509_510del; p.R170Ifs in three women affected with breast cancer and PALB2:c.172_175del;p.Q60Rfs in one woman affected with ovarian cancer.