
PROOFS-Registry - Premenopausal Women With Breast Cancer Optimally Treated With OFS
Female Breast CancerThere is only limited data for premenopausal patients in general, as well as for differences in the use of OFS in the subgroups of pre- and perimenopausal patients, respectively. The WSG ADAPT trial data on the impact of postmenopausal status and/or use of OFS within 3-4 weeks endocrine induction therapy show relevant impact of OFS/postmenopausal status on Ki-67 response; also, secondary amenorrhea after (neo-)adjuvant chemotherapy was a positive predictor of outcome due to OFS [8, 9]. This registry will give insights in the real-world use of OFS and the effect of secondary amenorrhea in female pre- and perimenopausal patients with or without previous use of chemotherapy and with different endocrine treatments (ET +/- GnRH). As adherence over time (5-10 years) plays a major role in the endocrine treatment, the registry will follow patients' treatments for up to 10 years and include QoL information. Results of MammaPrint® (MammaPrint® Index) as indicating factor for chemotherapy use and risk classification, thus, choice of adjuvant treatment (chemotherapy, OFS combined with endocrine therapy, or endocrine therapy alone) will be correlated to outcome under real-world conditions. Baseline, treatment, and relapse data shall be collected to gain further insight in the treatment paths, treatment adherence, and outcome of such patients.

Treatment for Breast Cancer Patients With Meninges Invaded by Tumor Cells
Breast Cancer MetastaticLeptomeningeal MetastasisThe goal of this clinical trial is to evaluate the efficacy of tucatinib and capecitabine in combination with intra-cerebrospinal fluid (CSF) trastuzumab on overall survival rate at 12 months in HER2-positive metastatic breast cancer (MBC) patients with proven leptomeningeal evolution and requiring intrathecal therapy.

Characterization of Extracellular Vesicles in Breast Cancer Patients
Breast CancerExtracellular vesicles (EVs) are lipid bilayer-delimited particles, naturally released from cells and mediators of intercellular cross-talk. In breast cancer (BC), EVs seem to be involved in the tumor microenvironment's shaping, in cancer cells invasion and in the set-up of metastasis. Clinical studies have provided initial evidence that these vesicles may have a prognostic and predictive value in breast cancer. Considering their ubiquitous presence in body fluids and their minimally invasive assessment through blood sampling, EVs could have a potential as liquid biopsy-derived biomarkers. Their quantification though is a complex task requiring complicated and time-consuming pre-analytical procedures of EVs isolation. This protocol want to develop a new method for the detection of tumor-derived-EVs associated proteins, based on the use of Single Molecule Array (SiMoA), a digital ELISA technology able to detect and quantify extremely low concentrations of target proteins or particles. The aim of this study is to evaluate how this new technology can allow the quantification of EVs plasma levels in patients affected by BC, providing useful diagnostic and prognostic information.

CDK4/6 Inhibitors in Patients With Hormone Receptor-positive Advanced Breast Cancer
Breast CancerThis is an ambispective, single-center study to evaluate the survival outcomes, adverse events and predictive biomarkers for CDK4/6 inhibitors in patients with hormone receptor-positive advanced breast cancer.

Clinical Study of Huaier Granules in Patients With Advanced Breast Cancer Without Visceral Metastasis...
Breast Cancer Stage IVThis is a multicenter, open-label, randomized controlled, prospective clinical study to evaluate the efficacy and safety of Huaier Granules in patients with advanced breast cancer without visceral metastasis.

Adjuvant Pyrotinib and Capecitabine For HER2 Positive Micro Invasive Breast Cancer
Breast Cancer Stage IFor patients with HER2-positive early-stage breast cancer, NCCN guidelines recommend chemotherapy plus targeted therapy as the standard adjuvant treatment for patients with tumors larger than 1 cm or lymph node-positive. The APT study enrolled patients with stage I HER2-positive breast cancer and has confirmed the efficacy and safety of intravenous chemotherapy combined with targeted therapy, but only 2.2% of the patients enrolled in microinvasion are enrolled, and there is a lack of large sample size data to provide a treatment reference for these patients. In order to further explore the optimal strategy for adjuvant therapy in this type of patient, we designed a new clinical trial to evaluate the efficacy and safety of oral capecitabine plus pyrotinib as adjuvant therapy in previous retrospective studies.

Efficacy and Safety of SPH4336 in Combination With Endocrine Therapy in Breast Cancer Patients With...
Breast Cancer Brain MetastasesThis study evaluated the safety and efficacy of SPH4336 in combination with endocrine therapy in breast cancer Patients with brain metastases.

Evaluating and Monitoring Immune and Clinical Responses in Early-Stage Triple Negative Breast Cancer...
Breast Cancer Triple NegativeBreast Cancer Stage II2 moreThis research study is a prospective, single arm, pilot study, designed to evaluate the correlation between the immune and clinical responses of subjects with untreated Stage II-III triple negative breast cancer (TNBC) undergoing standard of care neoadjuvant chemo- immunotherapy.

Prognostic Impact of the Neutrophil/Lymphocyte Ratio (NLR) in the Treatment of First-line Metastatic...
Breast CancerMetastatic Breast CancerThe impact of the inflammatory microenvironment in predicting the benefit of a CDK4/6 inhibitor in the treatment of locally advanced or first line metastatic breast cancer has not yet been studied. We propose a multicenter prospective study to confirm the prognostic value of pre-therapy NLR on progression-free survival of patients initiating treatment with a CDK4/6 inhibitor combined with hormonal therapy for locally advanced or metastatic HR-pos / HER2-neg breast cancer. We will also evaluate other markers of inflammation and their prognostic and predictive value for a better response to CDK4/6 inhibitor therapy in combination with hormone therapy in these patients. Specific blood tests (lymphocyte typing) will be performed during treatment with CDK4/6.

The Anti-tumor Effect of Metformin And Atorvastatin in Breast Cancer
Breast Cancer FemaleThis study aims at evaluating and comparing the anti-tumor effects of metformin and statins (hydroxyl-methyl-glutaryl-CoA reductase inhibitors) in patients with non-metastatic breast cancer (stage I, II, & III).