Dataset Information

Trends in Neoadjuvant Endocrine Therapy Use and Impact on Rates of Breast Conservation in Hormone Receptor-Positive Breast Cancer: A National Cancer Data Base Study.

ABSTRACT: The American College of Surgeons Oncology Group Z1031 trial demonstrated that neoadjuvant endocrine therapy (NET) increased breast-conserving surgery (BCS) rates for postmenopausal patients with clinical tumor stage 2-4c estrogen receptor-positive breast cancer. We evaluated national trends in NET use in relation to the conduct of the Z1031 trial and the impact of NET on the rates of BCS.Using the National Cancer Data Base (NCDB), we identified all cT2-4c hormone receptor (HR)-positive breast cancer patients age ?50 years from 2004 to 2012. The time intervals of pre-Z1031 (2004-2006), during Z1031 (2007-2009), and post-Z1031 (2010-2012) were examined, and adjusted analyses were performed using multivariable logistic regression.Of 77,272 patients, 2294 (3.0 %) received NET. Clinical T-stage distribution was 66,885 (86.6 %) for cT2, 7318 (9.5 %) for cT3, and 3069 (4.0 %) for cT4a-c. A small but statistically significant increase in NET use was noted, from 2.7 % pre-Z1031 to 3.2 % post-Z1031; the adjusted odds ratio (OR) for NET was 1.28 [95 % confidence interval (CI) 1.13-1.45; p < 0.001] for post-Z1031 versus pre-Z1031. NET use varied by clinical T stage, increasing from 1.8 % pre-Z1031 to 2.4 % post-Z1031 in cT2 patients (p < 0.001) and from 6.3 % pre-Z1031 to 7.4 % post-Z1031 in cT3 patients (p = 0.02). Patients receiving NET were more likely to undergo BCS compared with patients undergoing primary surgery (46.4 vs. 43.9 %; p = 0.02) with an adjusted OR of 1.60 (95 % CI 1.46-1.75; p < 0.001).NET use has increased slowly since the Z1031 trial; however, overall use remains low. NET significantly increased the rates of BCS in patients with HR-positive clinical T2-4c breast cancer. Clinicians should consider NET use for patients with HR-positive breast cancer interested in BCS.

SUBMITTER: Chiba A

PROVIDER: S-EPMC5437722 | biostudies-other | 2017 Feb

REPOSITORIES: biostudies-other

ACCESS DATA

Publications

Trends in Neoadjuvant Endocrine Therapy Use and Impact on Rates of Breast Conservation in Hormone Receptor-Positive Breast Cancer: A National Cancer Data Base Study.

Chiba Akiko A Hoskin Tanya L TL Heins Courtney N CN Hunt Kelly K KK Habermann Elizabeth B EB Boughey Judy C JC

Annals of surgical oncology 20160923 2

<h4>Background</h4>The American College of Surgeons Oncology Group Z1031 trial demonstrated that neoadjuvant endocrine therapy (NET) increased breast-conserving surgery (BCS) rates for postmenopausal patients with clinical tumor stage 2-4c estrogen receptor-positive breast cancer. We evaluated national trends in NET use in relation to the conduct of the Z1031 trial and the impact of NET on the rates of BCS.<h4>Methods</h4>Using the National Cancer Data Base (NCDB), we identified all cT2-4c hormo ...[more]

PMID: 27663568

Similar Datasets

Project description:BackgroundNeoadjuvant chemotherapy (NCT) is considered more effective in downstaging hormone receptor-positive (HR+) breast cancer than neoadjuvant endocrine therapy (NET), particularly in node-positive disease. This study compared breast and axillary response and survival after NCT and NET in HR+ breast cancer.MethodsBased on American College of Surgeons Oncology Group (ACOSOG) Z1031 criteria, women age 50 years or older with cT2-4 HR+ breast cancer who underwent NET or NCT and surgery were identified in the National Cancer Database 2010-2016. Chi-square and logistic regression analysis determined differences between the NCT and NET groups and therapy response, including downstaging and pathologic complete response (pCR, ypT0/is and ypN0).ResultsOf 19,829 patients, 14,025 (70.7%) received NCT and 5804 (29.3%) received NET. The NET patients were older (mean age, 68.9 vs. 60.3; P < 0.001) and had greater comorbidity (1+ Charlson-Deyo score, 21% vs. 16%; P < 0.001). Therapy achieved T downstaging (any) for 58% of the patients with NCT versus 40.5% of the patients with NET, and in-breast pCR was achieved for 9.3% of the NCT versus 1.3% of the NET patients (P < 0.001). Approximately half of the mastectomy procedures could have been potentially avoided for the patients with in-breast pCR (53.6% of the NCT and 43.8% of the NET patients). For the cN+ patients, N downstaging (any) was 29% for the NCT patients versus 18.3% for the NET patients (P < 0.001), and nodal pCR was achieved for 20.3% of the NCT versus 13.5% of the NET patients (P < 0.001). Among those with nodal pCR, axillary lymph node dissection (ALND) still was performed for 56% of the patients after NCT and 45% of the patients after NET.ConclusionsAlthough the response rates after NCT were higher, NET achieved both T and N downstaging and pCR. Neoadjuvant endocrine therapy can be used to de-escalate surgery for patients who cannot tolerate NCT or when chemotherapy may not be effective based on genomic testing.

Dataset Information

Trends in Neoadjuvant Endocrine Therapy Use and Impact on Rates of Breast Conservation in Hormone Receptor-Positive Breast Cancer: A National Cancer Data Base Study.

Publications

Trends in Neoadjuvant Endocrine Therapy Use and Impact on Rates of Breast Conservation in Hormone Receptor-Positive Breast Cancer: A National Cancer Data Base Study.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets