IL6 and breast cancer: Moreover, MCT-1 and IL-6 gene promotion was correlated in breast cancer patients with 3-year metastasis (r = 0.23, p = 0.008), 5-year metastasis (r = 0.26, p = 0.007) and bone metastasis (r = 0.39, p = 0.0002, n = 90) in the Bos dataset.