Background and purpose:Chemokines play an important role in breast cancer occurrence and development. However, little about the function of CCL28 in breast cancer is reported. This study was designed to observe and study the expression of chemokine CCL28 in breast cancer, and analyze their association with pathological features of breast cancer.Methods:Expressions of chemokine CCL28 in 150 breast cancer patients were determined by IHC(immunohistochemistry) technique. The corresponding normal breast tissues in paraneoplastic were also detected. The level of CCL28 expression in 150 breast cancer was analyzed whether it was associated with age, cTNM stage, tumor diameter, axillary lymph node status, ER status, PR status and HER-2 status. Results:①CCL28 was highly expressed in both breast cancer and normal breast tissues in paraneoplastic. The positive expression rate of CCL28 in breast cancer was 54.6%and the positive expression rate of CCL28 in normal paraneoplastic breast tissues was 9.3%. Expression of CCL28 in breast cancer was signiifcantly higher than that in normal paraneoplastic breast tissues, there was statistically significance between the two groups(P<0.001). ②The expression of CCL28 was not associated with age, cTNM stage, tumor size, axillary lymph node, ER, PR and HER-2 status(P>0.05). Conclusion:The level of CCL28 expression showed signiifcantly difference between breast cancer and paraneoplastic normal breast tissues. In conclusion, CCL28 may be correlated with breast cancer carcinogenesis and evolvement. The level of CCL28 expression was not signiifcantly correlated with lymph node metastasis. If CCL28 may be a factor to predict lymph node metastasis in breast cancer is worth further studying.