Loss of HER2 and disease prognosis after neoadjuvant treatment of HER2+ breast cancer.

Loss of HER2 and disease prognosis after neoadjuvant treatment of HER2+ breast cancer. Am J Transl Res. 2019;11(9):6110-6116 Authors: Branco FP, Machado D, Silva FF, André S, Catarino A, Madureira R, Pinto JM, Godinho JP, Simões PD, Brito M, Casa-Nova M, Moreira AR, Passos-Coelho JL Abstract INTRODUCTION: HER2 overexpression/amplification occurs in 15-20% breast cancers (BC) and is associated with worse prognosis. The addition of anti-HER2 treatment to neoadjuvant chemotherapy significantly improves the pathological complete response (pCR) rate. Changes in HER2 status after neoadjuvant treatment (NAT) have been reported and may affect prognosis. The aim of this study was to assess the efficacy of NAT in patients with HER2+ BC and its influence on HER2 status and associated prognostic impact. METHODS: Retrospective chart review and pathologic evaluation of all consecutive patients with HER2+ BC (defined as IHC 3+ or IHC 2+ confirmed by SISH) submitted to NAT between 2010-2015 in three Portuguese Hospitals. RESULTS: One hundred eight female patients were included; 40 with stage II, 68 with stage III. Hormone receptors were positive in 70. pCR (ypT0/isN0) was achieved in 48 patients (44%). With a median follow-up of 52 months, there were 5 disease free survival (DFS) events among pCR patients and 19 among non-pCR (P = 0.02). Of the 60 patients with residual disease at surgery, 52 remained HER2+ and 8 (13%) lost HER2 overexpression/ampli...
Source: American Journal of Translational Research - Category: Research Tags: Am J Transl Res Source Type: research

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Conclusion.Pathological response in locally advanced tumors is related to the molecular subtype of breast cancer, finding higher pCR rates in pure HER2 and triple‐negative tumors. A direct relationship was found between disease recurrences and the pathological response, evidencing greater tumor recurrence in patients who did not respond to NACT (Chevallier 3 and 4). EFS and OS were greater in patients with pCR, with statistical significance only in triple‐negative tumors.Implications for Practice.This research article is of scientific interest, because it describes the clinical and pathological features and analyzes th...
Source: The Oncologist - Category: Cancer & Oncology Authors: Tags: Breast Cancer, Global Health and Cancer Source Type: research
Authors: Takeshita T, Asaoka M, Katsuta E, Photiadis SJ, Narayanan S, Yan L, Takabe K Abstract Polo-like kinase 1 (PLK1), the most investigated member of the PLK family, plays a pivotal role both in the p53-mediated regulation of DNA damage repair and in mitosis, especially in the G2/M phase. However, the evidence on the clinical and prognostic relevance of PLK1 is limited to triple negative subtype among breast cancer (BC). We hypothesized that high expression of PLK1 is associated with TP53 inactivation, DNA repair deficiency, and worse prognosis in ER positive in BC in a large-scale cohort should clarify its cli...
Source: American Journal of Translational Research - Category: Research Tags: Am J Transl Res Source Type: research
The objective of this study is to determine factors related with axillary downstaging and complete pathological response (CPR), and how CPR influences the decision to perform bilateral mastectomy with immediate reduction. METHODS: A retrospective analysis of breast cancer patients who had undergone neoadjuvant chemotherapy and bilateral mastectomy with immediate reduction between 2000-2018 was performed. Two groups were compared:1) CPR and 2) non-CPR. Descriptive and comparative statistical analyses are provided. RESULTS: 69 patients; 26 (37.68%) reached CPR and 43 (62.32%) non-CPR. Median follow-up of 45.3 month...
Source: Cirugia eEspanola - Category: Surgery Authors: Tags: Cir Esp Source Type: research
AbstractBackgroundCharacterization of breast cancer phenotypes has improved our ability to predict breast cancer behavior. Triple-negative (TN) breast cancers have higher and earlier rates of distant events. It has been suggested that this behavior necessitates treating TNs faster than others, including use of neoadjuvant chemotherapy (NACT) if time to surgery is not rapid.MethodsA review of women diagnosed with non-inflammatory, invasive breast cancer was conducted using the National Cancer Database for patients not having NACT, diagnosed between 2010 and 2014. Changes in overall survival due to delay were measured by phe...
Source: Annals of Surgical Oncology - Category: Cancer & Oncology Source Type: research
Conclusions: With data obtained from patients treated in clinical practice, it has been possible to verify that the addition of pertuzumab to trastuzumab and neoadjuvant chemotherapy substantially increases the rate of pCR, especially in the HER2-enriched subtype but also in luminal subtypes, with no apparent benefit in basal-like tumors.
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
Authors: Neola B, Puppio B, Marino G, La Torre G Abstract BACKGROUND: Some Trials have demonstrated that the rate of false negative results of a sentinel lymph node biopsy in patients undergoing neoadjuvant chemotherapy is>10%. The aim of this study is to identify the predictive factors of a pathologic complete response in the axilla in order to make a better choice between the performance of an axillary lymphadenectomy or the performance of a sentinel lymph node biopsy. METHODS: All patients diagnosed with positive axillary lymph nodes and achieving a clinical complete response after a neoadjuvant therapy w...
Source: Annali Italiani di Chirurgia - Category: Surgery Tags: Ann Ital Chir Source Type: research
CONCLUSIONS: Treatment with dual anti-HER2 therapy for 24 weeks led to a numeric increase in pCR rate in women with HER2-positive breast cancer, without using chemotherapy. If validated, this approach may help identify patients who may benefit from de-escalation of therapy. PMID: 31662331 [PubMed - as supplied by publisher]
Source: Clinical Cancer Research - Category: Cancer & Oncology Authors: Tags: Clin Cancer Res Source Type: research
AbstractBiomarkers of breast cancer such as hormone receptors (HR) and human epidermal growth factor 2 (HER2) can be altered after neoadjuvant chemotherapy (NAC). However, whether the conversion of these receptors affects the prognosis of patients remains to be determined. We sought to evaluate the prognostic value of HR and HER2 receptors before and after NAC and to analyze their clinical implications. Relevant studies were used to calculate the pooled hazard ratios, 95% confidence interval (95% CI). This meta-analysis included eight studies with 2847 patients. Compared to patients with HR+  → +, patien...
Source: Breast Cancer Research and Treatment - Category: Cancer & Oncology Source Type: research
CONCLUSIONS: LPBC was marginally associated with higher pCR rate than non-LPBC in LT treated HER2+ BC patients. Quantitative assessment of the immune infiltrate by m-IF is feasible and may help correlate individual immune cell subpopulations and immune cell profiles with treatment response. PMID: 31653641 [PubMed - as supplied by publisher]
Source: Clinical Cancer Research - Category: Cancer & Oncology Authors: Tags: Clin Cancer Res Source Type: research
Conclusion: Breast MRI showed good accuracy in the prediction of a pathological complete response after NAC. The sensitivity and positive predictive value were highest for the HER2 and triple-negative subtypes.Resumo Objetivo: Avaliar a acur ácia da ressonância magnética (RM) das mamas na identificação de resposta patológica completa em pacientes com câncer de mama submetidas a quimioterapia neoadjuvante (QTN). Materiais e Métodos: Teste de validação diagnóstica, realizado por meio de estudo observacional, unicêntrico e ret rospectivo. As vari...
Source: Radiologia Brasileira - Category: Radiology Source Type: research
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