None of the variants associated significantly with cancer risk in the primary BC series; however, in the FinnGen data, NTHL1 c.244C>T p.(Gln82Ter) associated with BC with a high risk for homozygous (OR = 44.7 [95% CI 6.90–290], P = 6.7 × 10–5) and a low risk for heterozygous women (OR = 1.39 [1.18–1.64], P = 7.8 × 10–5). Here, NTHL1 is linked to cancer.