The association between expression of prolactin receptor and lymph node involvement in triple-negative breast cancer

Background: Triple-negative breast cancer (TNBC) is associated with a poor prognosis and requires more aggressive treatment.Aim: The study aimed to evaluate the prophetic role of the prolactin receptor (PRLR) in TNBC stratification.Materials & methods: In a retrospective study, 58 formalin-fixed paraffin-embedded tumor tissues from patients diagnosed with TNBC were examined for PRLR expression using immunohistochemistry. The potential associations between PRLR expression and tumor characteristics were assessed.Result: PRLR expression was negative in 36 (62%) patients and positive in 22 (38%) patients. The number of positive PRLR tumors was significantly higher in patients without lymph node involvement (p = 0.019).Conclusion: PRLR expression was negatively associated with lymph node invasion in TNBC.