1,720,985 research outputs found
Current controversies in the treatment of ductal carcinoma in situ of the breast
No full textDuctal carcinoma in situ (DCIS) represents a disease that includes different risk categories and does not necessarily turn into invasive cancer. The 20% of all newly diagnosed breast cancers consist in DCIS, with an incidence increased due to the widespread diffusion of screening programs. Once upon a time, mastectomy was considered the gold standard in treatment of DCIS, but over the years, breast-conserving surgery (BCS) has been included as the treatment of choice for patients with small lesions. Several randomized trials demonstrated that adjuvant treatment as radiation and ET reduce the risk of local recurrence, including invasive recurrences. Therefore, in patients with DCIS susceptible to conservative surgery, the key decision for management is represented by the addition of radiotherapy (RT) or ET. With the variety of surgical and adjuvant treatment options available, there has been great interest in tailoring therapies to the individual, with the goal of optimizing the balance of risks and benefits. From the observation of the first data showing how such treatments are not clearly associated with an improvement in disease specific mortality, the upcoming hypothesis is to consider omitting some of such treatments or to plan close surveillance for low risk lesions. Prospective studies on women treated with BCS alone have identified low risk lesions. Actually, the main challenge is how to recognize cases that will not progress to invasive lesions. Despite all the studies carried out and the many available data, there are no unique and universally accepted treatment criteria, so some issues of controversy are still open
Axillary lymph node surgical treatment
No full textNowadays, the overall attention is focused on de-escalating treatments for breast cancer (BC) including surgery, radiotherapy and chemotherapy. The introduction of sentinel lymph node biopsy (SLNB) has led to less invasive surgical approaches for accurately staging the axilla, with axillary lymph node dissection (ALND) progressively confined to a limited group of patients. One of the goal of surgery in de-escalating approaches is to reduce surgical morbidity by restricting or avoiding axillary surgery with no effect on survival. In this context the importance of imaging study for preoperative identification of axillary metastasis, in order to reduce axillary surgery, is gradually improving while the role of intraoperative assessment of sentinel nodes is progressively becoming limited to restricted groups of patients. According to the results of the ACOSOG Z0011 and following the most important guidelines, ALND can be safely omitted in selected patients treated with breast conserving surgery (BCS) with one or two positive SLNB while the adoption of SLNB positive alone in patients undergoing mastectomy is not yet defined. The increased employment of neoadjuvant chemotherapy (NAC) and the use of SLNB in patients after NAC plays an important role in de-escalation of axillary surgery in this group of patients. However current studies on this topic are still controversial, mainly about clinically positive lymph nodes (cN+) pre NAC patients or how to manage positive SLNB in post NAC patients. Some authors have collected predictive factors of positive non sentinel lymph nodes (NSLNs) in nomograms, considered an useful tool to avoid unnecessary further surgery. Elderly women represent specific group of patients where the axillary approach needs to be properly resized. The management of axilla in BC is in continuous evolution and ongoing studies could make even SLNB useless in the next future
Lymphatic Function of the Lower Limb after Groin Dissection for Vulvar Cancer and Reconstruction with Lymphatic SCIP Flap
Full text linkInguinofemoral lymphadenectomy, frequently performed for vulvar cancer, is burdened with substantial immediate and long-term morbidity. One of the most disabling treatment-related sequelae is lower limb lymphedema (LLL). The present study aims to describe the wound complications and the severity of LLL in patients who have undergone groin dissection for vulvar cancer and immediate inguinal reconstruction with the Lymphatic Superficial Circumflex Iliac Perforator flap (L-SCIP). We retrospectively reviewed the data of patients who underwent bilateral groin dissection and unilateral inguinal reconstruction with the L-SCIP. The presence and severity of postoperative LLL during the follow-up period were assessed by lymphoscintigraphy and limbs’ volume mea-surement. In addition, immediate complications at the level of the inguinal area were registered. The changes between preoperative and postoperative limb volumes were analyzed by Student’s t test. p values < 0.05 were considered significant. Thirty-one patients were included. The mean variation of volume was 479 ± 330 cc3 in the side where groin reconstruction had been performed, and 683 ± 425 cc3 in the contralateral side, showing smaller variation in the treated side (p = 0.022). Lymphoscintigraphy confirmed the clinical findings. Based on our results, inguinal reconstruction with L-SCIP performed at the same time of groin dissection in patients treated for vulvar cancer can provide a significant protective effect on LLL
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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