Abstract
Background
Few studies have been performed on post-relapse survival in patients with the early and late distant recurrence in estrogen receptor (ER)-positive, HER2-negative breast cancer.
Methods
A total of 205 patients with the early distant recurrence and 134 patients with the late distant recurrence of ER-positive, HER2-negative breast cancer who had undergone breast surgery or neoadjuvant chemotherapy between January 2000 and December 2004 were registered from nine institutions. Prognostic factors for post-relapse survival in patients with the early and late recurrence were analyzed.
Results
Post-relapse survival was significantly longer in patients with the late recurrence than in patients with the early recurrence. Predictive factors for post-relapse survival in patients with the early recurrence were lack of adjuvant chemotherapy, a long disease-free interval, and long durations of endocrine therapies and chemotherapies after relapse. In patients with the late recurrence, post-relapse survival was significantly improved for those individuals with one metastatic organ at relapse and individuals who were treated with the first-line and subsequent endocrine therapies for prolonged periods. Moreover, ER expression in primary breast tumors of late recurrence patients was significantly higher with a duration of the first-line endocrine therapy >6 months than in those with a duration ≤6 months.
Conclusion
Predictors for prognosis after relapse differed between patients with the early and late distant recurrence. Endocrine responsiveness after relapse is a key factor for improved post-relapse survival, and it is thus important to establish whether metastatic tumors are endocrine-resistant in ER-positive, HER2-negative recurrent breast cancer.
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Abbreviations
- ER:
-
Estrogen receptor
- PgR:
-
Progesterone receptor
- HER2:
-
Human epidermal growth factor receptor type 2
- Ki67 LI:
-
Ki67 labeling index
- IHC:
-
Immunohistochemistry
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Acknowledgments
This study was supported by a Grant-in-Aid for Scientific Research from the Japanese Breast Cancer Society.
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The original version of this article was revised: The P value of “ER (%), median (range)” was misplaced to previous row “Tumor grade 3” in Table 4 and the same was corrected.
An erratum to this article is available at http://dx.doi.org/10.1007/s12282-017-0771-2.
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Ogiya, A., Yamazaki, K., Horii, R. et al. Post-relapse survival in patients with the early and late distant recurrence in estrogen receptor-positive HER2-negative breast cancer. Breast Cancer 24, 473–482 (2017). https://doi.org/10.1007/s12282-016-0730-3
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DOI: https://doi.org/10.1007/s12282-016-0730-3