SCGB1D2 and breast cancer: One of the three SNPs in the chromosome 11 region, rs117564384, resides in SCGB1D2. SCGB1D2 expression is high in and almost exclusive to mammary tissue (Culleton et al., 2007), significantly differs between histologically normal breast tissue and breast cancer tissue (Zubor et al., 2015), and it also has been used as a marker to detect disseminated tumor cells (DTC) in breast cancer (Brown et al., 2006; Lacroix, 2006).