Abstract | BACKGROUND: METHODS: We examined the clinical and biological features of 6,980 women with invasive ductal carcinoma, and these patients were stratified according to ER and PR expression as double HR+ (ER + PR+), single HR+ (ER + PR- and ER-PR+) and double HR-negative (HR-, ER-PR-) tumors. RESULTS: In this study, 571 (8.2%) cases were single HR+ tumors, of which 90 (1.3%) were ER-PR+ tumors and 481 (6.9%) were ER + PR- tumors. Our multivariate analysis showed that in patients without HER2 overexpression ER + PR- tumors were associated with an increased risk of recurrence and death compared with ER + PR+ tumors, with a hazard ratio of 2.12 for disease-free survival (DFS) and 4.79 for overall survival (OS). In patients without HER2 overexpression ER-PR+ tumors had increased risk of recurrence and death compared with ER + PR+ tumor, with a hazard ratio of 4.19 for DFS and 7.22 for OS. In contrast, in patients with HER2 overexpression, the difference in survival between single HR+ tumors and double HR+ HR- tumors was not statistically significant. In patients without HER2 overexpression the DFS and OS of ER + PR- and ER-PR+ tumors were not significantly different from those of ER-PR- tumors. CONCLUSION: We have identified clinically and biologically distinct features of single HR+ tumors (ER-PR+ and ER + PR-) through comparison with both ER + PR+ and ER-PR- tumors. These differences were only significant in HER2- tumors, not in HER2+ tumors. Single HR+ tumors without HER2 overexpression (ER + PR-HER2- or ER-PR + HER2-) were associated with poorer survival than ER + PR + HER2- tumors, and had comparable poor survival to ER-PR-HER2- tumors ( triple-negative breast cancer).
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Authors | Soo Youn Bae, Sangmin Kim, Jun Ho Lee, Hyun-Chul Lee, Se Kyung Lee, Won Ho Kil, Seok Won Kim, Jeong Eon Lee, Seok Jin Nam |
Journal | BMC cancer
(BMC Cancer)
Vol. 15
Pg. 138
(Mar 18 2015)
ISSN: 1471-2407 [Electronic] England |
PMID | 25880075
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Biomarkers, Tumor
- Receptors, Estrogen
- Receptors, Progesterone
- Receptor, ErbB-2
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Topics |
- Adult
- Aged
- Aged, 80 and over
- Biomarkers, Tumor
- Breast Neoplasms
(drug therapy, genetics, metabolism, mortality, pathology)
- Female
- Follow-Up Studies
- Gene Expression
- Humans
- Middle Aged
- Neoplasm Grading
- Neoplasm Recurrence, Local
- Neoplasm Staging
- Prognosis
- Receptor, ErbB-2
(genetics, metabolism)
- Receptors, Estrogen
(genetics, metabolism)
- Receptors, Progesterone
(genetics, metabolism)
- Risk Factors
- Survival Analysis
- Triple Negative Breast Neoplasms
(drug therapy, genetics, mortality)
- Young Adult
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