TERT and breast cancer: In the recent COGS study of breast and ovarian cancer risk and telomere length associated with SNPs in the TERT region, rs7705526 was classified as being in what was referred to as “peak 2” (one of two sets of associated SNPs straddling TERT introns 2–4 in that study), and was associated with longer telomeres in blood cells and with increased risks of breast cancer (oestrogen receptor negative and positive subtypes) and ovarian cancer (serous low-malignant potential and serous invasive epithelial) (Bojesen et al. 2013; Pharoah et al. 2013).