40 research outputs found

    The impact of the COVID-19 pandemic on surgical management of breast cancer:global trends and future perspectives

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    Introduction: The rapid spread of COVID-19 across the globe is forcing surgical oncologists to change their daily practice. We sought to evaluate how breast surgeons are adapting their surgical activity to limit viral spread and spare hospital resources. Methods: A panel of 12 breast surgeons from the most affected regions of the world convened a virtual meeting on April 7, 2020, to discuss the changes in their local surgical practice during the COVID-19 pandemic. Similarly, a Web-based poll based was created to evaluate changes in surgical practice among breast surgeons from several countries. Results: The virtual meeting showed that distinct countries and regions were experiencing different phases of the pandemic. Surgical priority was given to patients with aggressive disease not candidate for primary systemic therapy, those with progressive disease under neoadjuvant systemic therapy, and patients who have finished neoadjuvant therapy. One hundred breast surgeons filled out the poll. The trend showed reductions in operating room schedules, indications for surgery, and consultations, with an increasingly restrictive approach to elective surgery with worsening of the pandemic. Conclusion: The COVID-19 emergency should not compromise treatment of a potentially lethal disease such as breast cancer. Our results reveal that physicians are instinctively reluctant to abandon conventional standards of care when possible. However, as the situation deteriorates, alternative strategies of de-escalation are being adopted. Implications for Practice: This study aimed to characterize how the COVID-19 pandemic is affecting breast cancer surgery and which strategies are being adopted to cope with the situation. © 2020 AlphaMed Pres

    Sentinel Node Biopsy for Breast Cancer : Aspects and evolution

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    Sentinel Node Biopsy (SNB) in clinical practice was pivotal to the shaping of modern diagnosis, staging and treatment of patients with breast cancer. The use of radioisotope (RI) and blue dye (BD) has led to high detection rates with low false negatives, but delivery-of-care limitations connected to these tracers as well as the need for methods addressing new clinical conundrums delineates the urge for new tracers with comparable performance, easier logistics and, ideally expanded implementations. Aim of the present thesis is to examine the outcomes of Superparamagnetic Iron Oxide (SPIO) nanoparticles, a new tracer based on magnetism for the detection of the sentinel nodes. Paper I is a prospective multicentre trial comparing SPIO to RI+BD, with all tracers injected at the same patient. In 206 patients, SPIO had a similar detection rate (97.6 vs 97.1%, p=0.76) whereas concordance between methods was 98%. The study was completed by a meta-analysis of similar trials published until that point. The detection rates were comparable (fixed OR:1.10; 0.67,1.79, p=0.71), and so was concordance between tracers (fixed RD: 0.00; -0.01, 0.01, p=0.82). Discoloration was present after periareolar SPIO injection in 39% of patients, almost exclusively treated with breast conservation, which reduced to 8.6% after 15 months of follow-up. Paper II was a pilot study of twelve patients with breast cancer and SNB performed where SPIO and the combination of RI+BD were injected, but SPIO was injected up to 15 days preoperatively, with total success in detection and complete concordance. Paper III tested the performance of SPIO as a sole tracer in a pragmatic double-arm non-randomised trial comparing it to the combination of RI+BD. Detection was 95.7% for SPIO and 96.8% for RI (p = 0.59). The preoperative injection of SPIO (1-27 d) enhanced SPIO specific detection (95.7 vs 86%, p=0.002). Paper IV is an interim analysis of a multicentre cohort study including patients with high-risk DCIS planned for breast conservation or any DCIS planned for mastectomy. SPIO was injected to “mark” the sentinel node but SNB was performed in a second operation only if invasive cancer was found at the first operation. In 151 included patients, this technique led to avoidance of 81.5% SNB, with a cost reduction of 14.1% for the entire cohort and 25.8% for the patients that did not have invasive cancer. The detection rate at reoperation was superior for SPIO and comparable with SNB detection at primary operation. In conclusion, SPIO is a novel tracer for SNB in breast cancer with comparable performance, fit for performance in a global setting and with wider clinical implementations compared to RI+BD

    Sentinel Node Biopsy for Breast Cancer : Aspects and evolution

    No full text
    Sentinel Node Biopsy (SNB) in clinical practice was pivotal to the shaping of modern diagnosis, staging and treatment of patients with breast cancer. The use of radioisotope (RI) and blue dye (BD) has led to high detection rates with low false negatives, but delivery-of-care limitations connected to these tracers as well as the need for methods addressing new clinical conundrums delineates the urge for new tracers with comparable performance, easier logistics and, ideally expanded implementations. Aim of the present thesis is to examine the outcomes of Superparamagnetic Iron Oxide (SPIO) nanoparticles, a new tracer based on magnetism for the detection of the sentinel nodes. Paper I is a prospective multicentre trial comparing SPIO to RI+BD, with all tracers injected at the same patient. In 206 patients, SPIO had a similar detection rate (97.6 vs 97.1%, p=0.76) whereas concordance between methods was 98%. The study was completed by a meta-analysis of similar trials published until that point. The detection rates were comparable (fixed OR:1.10; 0.67,1.79, p=0.71), and so was concordance between tracers (fixed RD: 0.00; -0.01, 0.01, p=0.82). Discoloration was present after periareolar SPIO injection in 39% of patients, almost exclusively treated with breast conservation, which reduced to 8.6% after 15 months of follow-up. Paper II was a pilot study of twelve patients with breast cancer and SNB performed where SPIO and the combination of RI+BD were injected, but SPIO was injected up to 15 days preoperatively, with total success in detection and complete concordance. Paper III tested the performance of SPIO as a sole tracer in a pragmatic double-arm non-randomised trial comparing it to the combination of RI+BD. Detection was 95.7% for SPIO and 96.8% for RI (p = 0.59). The preoperative injection of SPIO (1-27 d) enhanced SPIO specific detection (95.7 vs 86%, p=0.002). Paper IV is an interim analysis of a multicentre cohort study including patients with high-risk DCIS planned for breast conservation or any DCIS planned for mastectomy. SPIO was injected to “mark” the sentinel node but SNB was performed in a second operation only if invasive cancer was found at the first operation. In 151 included patients, this technique led to avoidance of 81.5% SNB, with a cost reduction of 14.1% for the entire cohort and 25.8% for the patients that did not have invasive cancer. The detection rate at reoperation was superior for SPIO and comparable with SNB detection at primary operation. In conclusion, SPIO is a novel tracer for SNB in breast cancer with comparable performance, fit for performance in a global setting and with wider clinical implementations compared to RI+BD

    Sentinel Node Biopsy for Breast Cancer : Aspects and evolution

    No full text
    Sentinel Node Biopsy (SNB) in clinical practice was pivotal to the shaping of modern diagnosis, staging and treatment of patients with breast cancer. The use of radioisotope (RI) and blue dye (BD) has led to high detection rates with low false negatives, but delivery-of-care limitations connected to these tracers as well as the need for methods addressing new clinical conundrums delineates the urge for new tracers with comparable performance, easier logistics and, ideally expanded implementations. Aim of the present thesis is to examine the outcomes of Superparamagnetic Iron Oxide (SPIO) nanoparticles, a new tracer based on magnetism for the detection of the sentinel nodes. Paper I is a prospective multicentre trial comparing SPIO to RI+BD, with all tracers injected at the same patient. In 206 patients, SPIO had a similar detection rate (97.6 vs 97.1%, p=0.76) whereas concordance between methods was 98%. The study was completed by a meta-analysis of similar trials published until that point. The detection rates were comparable (fixed OR:1.10; 0.67,1.79, p=0.71), and so was concordance between tracers (fixed RD: 0.00; -0.01, 0.01, p=0.82). Discoloration was present after periareolar SPIO injection in 39% of patients, almost exclusively treated with breast conservation, which reduced to 8.6% after 15 months of follow-up. Paper II was a pilot study of twelve patients with breast cancer and SNB performed where SPIO and the combination of RI+BD were injected, but SPIO was injected up to 15 days preoperatively, with total success in detection and complete concordance. Paper III tested the performance of SPIO as a sole tracer in a pragmatic double-arm non-randomised trial comparing it to the combination of RI+BD. Detection was 95.7% for SPIO and 96.8% for RI (p = 0.59). The preoperative injection of SPIO (1-27 d) enhanced SPIO specific detection (95.7 vs 86%, p=0.002). Paper IV is an interim analysis of a multicentre cohort study including patients with high-risk DCIS planned for breast conservation or any DCIS planned for mastectomy. SPIO was injected to “mark” the sentinel node but SNB was performed in a second operation only if invasive cancer was found at the first operation. In 151 included patients, this technique led to avoidance of 81.5% SNB, with a cost reduction of 14.1% for the entire cohort and 25.8% for the patients that did not have invasive cancer. The detection rate at reoperation was superior for SPIO and comparable with SNB detection at primary operation. In conclusion, SPIO is a novel tracer for SNB in breast cancer with comparable performance, fit for performance in a global setting and with wider clinical implementations compared to RI+BD

    The role of micro RNA in primary liver malignancy

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    MicroRNAs are a class of non-coding molecules found to regulate a variety of cellular functions in health and disease. Dysregulation of microRNAs is involved in liver disease, especially hepatocarcinogenesis. Since primary hepatic malignancies are typically characterized by late diagnosis, frequent recurrence, and poor response to adjuvant therapy, there is a need for the discovery of novel biomarkers in order to achieve earlier diagnosis, predict tumor aggressiveness and response to adjuvant therapy. The purpose of this study is to evaluate the expression of certain microRNAs (miR-21, -31, -122, -145, -146a, - 200c, -221, -222 and -223) in patients with hepatocellular carcinoma (HCC) and intrahepatic cholangiocarcinoma (ICC), as well as to assess their prognostic significance. Micro-RNA expression was assessed by reverse transcription and real-time PCR (RT-PCR). Clinicopathological data and survival rates were retrieved and analyzed. According to our results, miR-21, miR-31, miR-122, miR-221, miR-222 were significantly up-regulated in HCC tissues, whereas miR-145, miR-146a, miR-200c, and miR-223 were found to be down-regulated. Concerning ICC samples, miR-21, miR-31, and miR-223 were found to be over-expressed, whereas miR-122, miR-145, miR-200c, miR-221, and miR-222 were down-regulated. Additionally, expression of miR-21, miR-31, miR-122, and miR-221 in HCC correlated with cirrhosis, while miR-21 and miR-221 associated with tumor stage and poor prognosis. In ICC tissues, miR-21, miR-31, and miR-223 were found to be over-expressed, but no correlation with clinicopathological features was found.Τα microRNA είναι μόρια γενετικού υλικού που δεν κωδικοποιούν πληροφορίες, έχει όμως βρεθεί ότι ρυθμίζουν μια ποικιλία κυτταρικών διεργασιών σε υγεία και νόσο. Η απορρύθμισή τους εμπλέκεται σε νοσήματα του ήπατος, ιδίως στην καρκινογένεση. Αφού τα πρωτοπαθή νεοπλάσματα του ήπατος χαρακτηρίζονται από όψιμη διάγνωση, συχνή υποτροπή και πτωχή απόκριση στη συμπληρωματική θεραπεία, υπάρχει ανάγκη να ανακαλυφθούν νέοι βιοδείκτες προκειμένου να επιτευχθεί πρωιμότερη διάγνωση, να προβλεφθεί η επιθετικότητα μιάς βλάβης και η απόκριση στη συμπληρωματική θεραπεία. Ο σκοπός της παρούσας μελέτης είναι να εκτιμηθεί η έκφραση συγκεκριμένων microRNA (miR-21, miR-31, miR-122, miR145, miR-146a, miR-200c, miR-221, miR-222 και miR-223) σε ασθενείς με ηπατοκυτταρικό καρκίνωμα (ΗΚΚ) και ενδοηπατικό χολαγγειοκαρκίνωμα (ΕΧΚ), καθώς και να εκτιμηθεί η προγνωστική τους αξία. Η έκφρασή των microRNA προσδιορίσθηκε με rt-PCR. Κλινικοπαθολογικά δεδομένα και επιβίωση συνελέγησαν και αναλύθηκαν. Σύμφωνα με τα αποτελέσματά μας, τα miR-21, -31, -122, -221, -222 βρέθηκαν σημαντικώς αυξημένα, σε ιστούς ασθενών με ΗΚΚ, ενώ τα miR-145, -146a, -200c και -223 βρέθηκαν μειωμένα. Σε ασθενείς με ΕΧΚ, τα miR-21, -31, -223 βρέθηκαν υπερεκφρασμένα, ενώ τα miR-122, -145, -200c, -221, -222 βρέθηκαν ελαττωμένα. Επιπλέον, η έκφραση των miR-21, -31, -122 και -221 στο ΗΚΚ βρέθηκε να σχετίζεται με την παρουσία κίρρωσης, ενώ τα miR-21 και -221 σχετίζονταν με το στάδιο της νόσου και την πτωχή πρόγνωση. Στα ΕΧΚ τα miR-21, -31, -223 βρέθηκαν υπερεκφρασμένα, αλλά δεν ανευρέθηκε συσχέτιση με κλινικοπαθολογικά χαρακτηριστικά
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