CD68 and breast cancer: After adjusting clinico-pathological factors, gene expression level of CD68 maintained independent association to OS (High vs. low-expression, HR = 0.07, 95%CI 0.01–0.68, P = 0.022) and PR-OS (High vs. low-expression, HR = 0.09, 95%CI 0.01–0.79, P = 0.029) in recurrent BC patients.