BMI ≥ 30 kg/m2 was not associated with increased risk of relapsed breast cancer, but was the only covariate significantly associated with any of the elevated serum levels of CRP (OR 5.07, 95% CI 2.09–12.33, p < 0.001) and SAA (OR 2.47, 95% CI 1.06–5.78, p = 0.036). This evidence concerns the gene CRP and breast carcinoma.