The allelic variant C rs10454142, which is a risk factor for BC, is associated with reduced transcription of three genes, namely GTF2A1L (NES = −0.46; p = 1.68 × 10−11), RP11-460M2.1 (NES = −0.39; p = 1.8 × 10−8), and STON1-GTF2A1L (NES = −0.37; p = 7.2 × 10−8), in visceral adipose tissue and two genes, namely GTF2A1L (NES = −0.55; p = 2.1 × 10−22) and STON1-GTF2A1L (NES = −0.36; p = 1.7 × 10−9), in subcutaneous adipose tissue. This evidence concerns the gene STON1 and breast cancer.