[Prognostic value of estrogen receptor, progesterone receptor and human epidermal growth factor receptor-2 in node positive breast cancer patients treated by mastectomy]

Shu-lian Wang, Ye-xiong Li, Yong-wen Song, Wei-hu Wang, Jing Jin, Yue-ping Liu, Xin-fan Liu, Zi-hao Yu
Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology] 2010, 32 (7): 520-5

OBJECTIVE: To evaluate the prognostic value of estrogen receptor (ER), progesterone receptor (PR) and human epidermal growth factor receptor-2 (Her-2) in node-positive breast cancer patients treated by mastectomy.

METHODS: The clinicopathological data of 835 breast cancer patients treated by mastectomy from January 2000 to December 2004 were retrospectively analyzed. All had positive axillary nodes without distant metastases and with the immunohistochemistry staining of ER, PR and Her-2 available. 764 (91.5%) patients received anthracycline- and/or taxanes-based chemotherapy. 464 (55.6%) patients received hormonal therapy. Eight (1%) patients received trastuzumab. Postmastectomy radiotherapy were given to 352 out of 437(80.5%)patients with T3-T4 and/or N2-N3 disease and 68 out of 398(20.9%)patients with T1-2N1 disease. Patients were classified into 4 subgroups according to the status of hormone receptors (ER and PR, Rec) and Her-2: Rec(-)/Her-2(-) (triple negative), Rec(-)/Her-2(+), Rec(+)/Her-2(+) and Rec(+)/Her-2(-). End points were isolated locoregional recurrence (LRR), distant metastases (DM), disease-free survival (DFS) and overall survival (OS).

RESULTS: 141 (16.9%) patients were Rec(-)/Her-2(-), 99 (11.9%) Rec(-)/Her-2(+), 157 (18.8%) Rec(+)/Her-2(+) and 438 (52.5%) Rec(+)/Her-2(-). Patients with Rec(+)/Her-2(-) breast cancer had a significantly lower 5-year LRR rate than others (6.2% vs. 12.9%, P = 0.004). Compared with patients with Rec(+) breast cancer, patients with Rec(-) breast cancer had significantly higher 5-year DM rate (26.4% vs. 19.7%, P = 0.0008), lower DFS rate (66.7% vs. 75.6%, P = 0.0001) and lower OS rate (71.4% vs. 84.2%, P = 0.0000). In multivariate analysis, Rec(+)/Her-2(-) was significantly associated with lower risk of LRR. Rec(-) was an independent prognostic factor for higher risk of DM, decreased DFS and OS.

CONCLUSION: ER, PR and Her-2 are independent prognostic factors for locoregional recurrence and survival in node-positive breast cancer patients treated by mastectomy.

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