CHST9 and neoplasm: In the subgroup of TNBC patients harboring large tumors (tumor size > 2 cm), the CHST9 rs1436904 G allele (GT and GG genotype) was associated with a significantly increased risk of disease progression (HR = 1.88, 95% CI = 1.06–3.35; P = 0.032) compared to the TT genotype.