CD27 and breast carcinoma: BAFF-R on IgD+ CD38- unsw mem (B cell panel; Odds ratio:0.9819, 95%CI:0.9731-0.9908, p-value:6.93×10−5) and CD27 on PB/PC (B cell panel; Odds ratio:0.7162, 95%CI:0.7162-0.8093, p-value:2.72×10−18) were both linked to a decreased risk of breast cancer according to the IVW method, and these findings were consistent with the results from the weighted mode and weighted median.