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Breast Cancer Research and Treatment

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11.10.2016 | Clinical trial

Assessment of pathologic response and long-term outcome in locally advanced breast cancers after neoadjuvant chemotherapy: comparison of pathologic classification systems

verfasst von: Misun Choi, Yeon Hee Park, Jin Seok Ahn, Young-Hyuck Im, Seok Jin Nam, Soo Youn Cho, Eun Yoon Cho

Erschienen in: Breast Cancer Research and Treatment | Ausgabe 3/2016

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Abstract

Purpose

Several pathologic classification systems have been developed to evaluate tumor response after neoadjuvant chemotherapy (NAC) for breast cancer. We aimed to compare pathologic classification systems and to investigate prognostic factors and risk stratification according to molecular subtype in relation to survival.

Methods

We retrospectively evaluated pathologic response after NAC in 485 breast cancer patients by applying the National Surgical Adjuvant Breast and Bowel Project B18 trial (NSABP-B18), Miller and Payne system, Chevallier’s classification, Sataloff’s classification, residual cancer burden (RCB), residual disease in breast and nodes (RDBN), and clinical–pathologic stage + estrogen receptor status and grade staging system (CPS + EG).

Results

All seven classification systems were significantly associated with overall survival (OS) and distant disease-free survival (DDFS). Regarding intrinsic subtypes, all systems were significantly associated with OS and DDFS for triple-negative tumors. Only RCB had prognostic significance for all four subtypes in relation to both OS and DDFS, and RDBN in DDFS only for all subtypes. In risk factor analyses, lymphovascular invasion (LVI), as well as other classic pathologic prognostic factors such as tumor size, lymph node status, and hormonal receptor status, was significantly associated with both OS and DDFS for the entire study group. Regarding subtypes, LVI was associated with DDFS for each subtype except Luminal B-like tumors.

Conclusions

Our results suggest that pathologic classification systems that evaluate residual tumors in both breast and lymph nodes after NAC show better association with clinical outcome. Furthermore, combining LVI with other classic prognostic factors might have prognostic value for the assessment of treatment response after NAC.

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Titel: Assessment of pathologic response and long-term outcome in locally advanced breast cancers after neoadjuvant chemotherapy: comparison of pathologic classification systems
verfasst von: Misun Choi
Yeon Hee Park
Jin Seok Ahn
Young-Hyuck Im
Seok Jin Nam
Soo Youn Cho
Eun Yoon Cho
Publikationsdatum: 11.10.2016
Verlag: Springer US
Erschienen in: Breast Cancer Research and Treatment / Ausgabe 3/2016
Print ISSN: 0167-6806
Elektronische ISSN: 1573-7217
DOI: https://doi.org/10.1007/s10549-016-4008-4

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Springer Medizin

Assessment of pathologic response and long-term outcome in locally advanced breast cancers after neoadjuvant chemotherapy: comparison of pathologic classification systems

Abstract

Purpose

Methods

Results

Conclusions

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Springer Medizin

Abstract

Purpose

Methods

Results

Conclusions

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