One-Year Neoadjuvant Endocrine Therapy in Breast Cancer

Orsolya Rusz, András Vörös, Zoltán Varga, Gyöngyi Kelemen, Gabriella Uhercsák, Alíz Nikolényi, Katalin Ormándi, Zsolt Simonka, Zsuzsanna Kahán

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3 Citations (Scopus)

Abstract

The evaluation of the effects of 1-year endocrine therapy (NET) was aimed at. A retrospective analysis of 42 cases with 46 stage II–III invasive, hormone receptor-positive, HER2-negative breast cancers was performed. One-year NET was planned with letrozole (n = 33, postmenopausal group), or with goserelin plus letrozole (n = 7) or with goserelin plus tamoxifen (n = 2) (premenopausal group). Surgery was performed in accordance with the initial stage and the response to therapy. With regard to the tumor remaining in the surgical specimen, risk groups were constructed: Group 1: stage 0, pathological complete regression (pCR); Group 2: stages IA-IIA; Group 3: stages ≥IIB + cases with clinical progression. Due to local progression, NET was replaced by neoadjuvant chemotherapy in three patients (four tumors). In two postmenopausal patients, letrozole was replaced by tamoxifen because of the insufficient treatment effect. In 19/42 cases, breast-conserving surgery was performed. Within Group 1, there was no cancer in four cases, while only DCIS remained in 2 (pCR: 13 %); Groups 2 and 3 comprised 25 and 15 cases, respectively. The likeliness of a good response (Groups 1 and 2 vs. Group 3) to NET was increased by 7 % for every 1 % increase of the expression of ER (OR = 1.070; 95 % CI: 1.007–1.138, p = 0.029). Progression-free survival differed according to treatment response (p = 0.001). The post-therapy Ki67 value of ≤15 % had only a marginal effect on survival. No other associations were detected between the tumor characteristics and the therapeutic response or survival. Long-duration NET is effective and safe in cases of hormone-sensitive breast cancer.

Original languageEnglish
Pages (from-to)977-984
Number of pages8
JournalPathology and Oncology Research
Volume21
Issue number4
DOIs
Publication statusPublished - Sep 28 2015

Keywords

  • Breast cancer
  • Hormone sensitivity
  • Letrozole
  • Neoadjuvant endocrine therapy
  • Predictive factors
  • Tamoxifen

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Oncology
  • Cancer Research

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  • Cite this

    Rusz, O., Vörös, A., Varga, Z., Kelemen, G., Uhercsák, G., Nikolényi, A., Ormándi, K., Simonka, Z., & Kahán, Z. (2015). One-Year Neoadjuvant Endocrine Therapy in Breast Cancer. Pathology and Oncology Research, 21(4), 977-984. https://doi.org/10.1007/s12253-015-9911-1