Radiofrequency ablation appears effective for early stage breast cancer and more accurate than lumpectomy in terms of obtaining more free margins. However, surgical excision plus radiofrequency ablation was infrequently associated with local infection. PurposeTo compare the safety and efficacy of US-guided percutaneous radiofrequency ablation (RFA) as a local treatment for breast cancer with that of lumpectomy.Materials and MethodsA prospective, randomized open-label phase II clinical trial (clinicaltrials.gov identification number NCT02281812) was conducted in a single institution from 2013 to 2017. Women with invasive ductal carcinoma of the breast measuring 2 cm or smaller were randomly assigned to receive RFA or lumpectomy alone (control group). Margin status at surgery, tumor cell viability after RFA (with nicotinamide adenine dinucleotide [NADH] and cytokeratin 18 [CK18] staining), cosmetic results, adverse events, and local recurrences were evaluated with univariable and multivariable analyses.ResultsForty subjects (20 in the RFA group and 20 in the lumpectomy group) were evaluated. The mean participant age was 64 years (range, 46–86 years). NADH and CK18 staining demonstrated absence of tumor cell viability after RFA with at least one of the two...

Traditionally, studies to address the characterization of mechanisms promoting tumor aggressiveness and progression have been focused only on primary tumor analyses, which could provide relevant information but have limitations to really characterize the more aggressive tumor population. To overcome these limitations, circulating tumor cells (CTCs) represent a noninvasive and valuable tool for real-time profiling of disseminated tumor cells. Therefore, the aim of the present study was to explore the value of CTC enumeration and characterization to identify markers associated with the outcome and the aggressiveness of triple-negative breast cancer (TNBC). For that aim, the CTC population from 32 patients diagnosed with TNBC was isolated and characterized. This population showed important cell plasticity in terms of expression of epithelia/mesenchymal and stemness markers, suggesting the relevance of epithelial to mesenchymal transition (EMT) intermediate phenotypes for efficient tumor dissemination. Importantly, the CTC signature demonstrated prognostic value to predict the patients’ outcome and pointed to a relevant role of tissue inhibitor of metalloproteinases 1 (TIMP1) and androgen receptor (AR) for TNBC biology. Furthermore, we also analyzed the usefulness of the AR and TIMP1 blockade to target TNBC proliferation and dissemination using in vitro and in vivo zebra fish and mouse models. Overall, the molecular characterization of CTCs from advanced TNBC patients identifies highly specific biomarkers with potential applicability as noninvasive prognostic markers and reinforced the value of TIMP1 and AR as potential therapeutic targets to tackle the most aggressive breast cancer.