A virtual biopsy of liver parenchyma to predict the outcome of liver resection.

The preoperative risk assessment of liver resections (LR) is still an open issue. Liver parenchyma characteristics influence the outcome but cannot be adequately evaluated in the preoperative setting. The present study aims to elucidate the contribution of the radiomic analysis of non-tumoral parenchyma to the prediction of complications after elective LR. All consecutive patients undergoing LR between 2017 and 2021 having a preoperative computed tomography (CT) were included. Patients with associated biliary/colorectal resection were excluded. Radiomic features were extracted from a virtual biopsy of non-tumoral liver parenchyma (a 2 mL cylinder) outlined in the portal phase of preoperative CT. Data were internally validated. Overall, 378 patients were analyzed (245 males/133 females-median age 67 years-39 cirrhotics). Radiomics increased the performances of the preoperative clinical models for both liver dysfunction (at internal validaton, AUC = 0.727 vs. 0.678) and bile leak (AUC = 0.744 vs. 0.614). The final predictive model combined clinical and radiomic variables: for bile leak, segment 1 resection, exposure of Glissonean pedicles, HU-related indices, NGLDM_Contrast, GLRLM indices, and GLZLM_ZLNU; for liver dysfunction, cirrhosis, liver function tests, major hepatectomy, segment 1 resection, and NGLDM_Contrast. The combined clinical-radiomic model for bile leak based on preoperative data performed even better than the model including the intraoperative data (AUC = 0.629). The textural features extracted from a virtual biopsy of non-tumoral liver parenchyma improved the prediction of postoperative liver dysfunction and bile leak, implementing information given by standard clinical data. Radiomics should become part of the preoperative assessment of candidates to LR.

Topical Tranexamic Acid: Risks, Benefits and Novel Complications in Aesthetic Plastic Surgery.

Antifibrinolytics, particularly tranexamic acid (TXA), are agents used to reduce bleeding. TXA is a synthetic reversible competitive inhibitor to the lysine receptor found on plasminogen. By reversibly binding to this site, it leads to plasminogen being unable to bind to fibrin and so prevents fibrinolysis, this stabilizes the clot and thus prevents hemorrhage. (Pekrul in Der Anaesth 70:515-521, 2021) It can be used either intravenously or topically but has never entered mainstream use in plastic surgery. (Pekrul in Der Anaesth 70:515-521, 2021) This is most likely due to understandable fears of thromboembolic events. On the other hand, the tempting benefits are reduced bleeding (perioperatively) decreased bruising and swelling, and thus increased aesthetic, important for obvious reasons. A review of the literature was done to go deeper on this issue, examining topical use in aesthetic surgery. Clear benefit was shown in the literature, it could be postulated that it would not be unwise to consider more research on topical use of TXA in certain cases, the benefits could greatly outweigh the risks. Old fears and conceptions, unsupported by the literature at the time of writing, should not hold back further research, and the benefits shown could even potentially justify the topical use of these agents in the near future. Further studies evaluating the utility of TXA in Panniculectomy and Abdominoplasty surgery should be performed especially, since only one was found which reported no significant benefit. Minor complications were present, such as minor delayed post-auricular skin healing, temporary unilateral marginal mandibular neuropraxia and increased cumulative seroma volume. These were novel findings and could warrant further investigation as well. After performing a review of the literature, it was seen that topical TXA generally adds benefit in aesthetic plastic surgery, with no particularly significant complications. We would like to bring more attention to the issue and support more studies on TXA use. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors   www.springer.com/00266 .

Radiomics of Biliary Tumors: A Systematic Review of Current Evidence.

Biliary tumors are rare diseases with major clinical unmet needs. Standard imaging modalities provide neither a conclusive diagnosis nor robust biomarkers to drive treatment planning. In several neoplasms, texture analyses non-invasively unveiled tumor characteristics and aggressiveness. The present manuscript aims to summarize the available evidence about the role of radiomics in the management of biliary tumors. A systematic review was carried out through the most relevant databases. Original, English-language articles published before May 2021 were considered. Three main outcome measures were evaluated: prediction of pathology data; prediction of survival; and differential diagnosis. Twenty-seven studies, including a total of 3605 subjects, were identified. Mass-forming intrahepatic cholangiocarcinoma (ICC) was the subject of most studies (n = 21). Radiomics reliably predicted lymph node metastases (range, AUC = 0.729−0.900, accuracy = 0.69−0.83), tumor grading (AUC = 0.680−0.890, accuracy = 0.70−0.82), and survival (C-index = 0.673−0.889). Textural features allowed for the accurate differentiation of ICC from HCC, mixed HCC-ICC, and inflammatory masses (AUC > 0.800). For all endpoints (pathology/survival/diagnosis), the predictive/prognostic models combining radiomic and clinical data outperformed the standard clinical models. Some limitations must be acknowledged: all studies are retrospective; the analyzed imaging modalities and phases are heterogeneous; the adoption of signatures/scores limits the interpretability and applicability of results. In conclusion, radiomics may play a relevant role in the management of biliary tumors, from diagnosis to treatment planning. It provides new non-invasive biomarkers, which are complementary to the standard clinical biomarkers; however, further studies are needed for their implementation in clinical practice.

A study investigating the knowledge and responses of Italian medical students to the COVID-19 pandemic.

Italy was initially one of the worse affected countries by the novel coronavirus (COVID-19). Medical students frequenting hospitals are more susceptible to be infected by the virus but also able to see the effects of the pandemic from the frontline. The aim of this study was to assess the COVID-19 related knowledge, behavioral changes, and perceptions of Italian medical students within the first 90 days after the onset of the outbreak in Italy. A national cross-sectional study was conducted from 23rd April to 31st April 2020. Participants were Italian medical students whose knowledge, behavioral changes, and perceptions of the COVID-19 pandemic were assessed. The survey consisted of: demographics, COVID-19 related general knowledge, behavioral changes, and perceptions of the pandemic. A total of 520 students answered the survey. The majority of the students' ages ranged from 21 to 25 years old (345, 66.3%). Only 48.6% stated that they had received a formal education about COVID-19 from their medical institutions. However, all the students declared that they tried to inform themselves, mostly through WHO, CDC, UpToDate (56%), but also (21.6%) through national guidelines, social networks (Facebook, Instagram, and YouTube) (11.5%), and other sources (10.9%). Italian medical students demonstrated a high level of COVID-19-related general knowledge as well as self-reported preventative behavioral changes but only had a moderate risk perception regarding the pandemic. They improved their health habits but questioned the reliability of information and handling of the pandemic by health authorities.

Italian Neurosurgical Residents' Experience with Research Activities: A National Survey.

BACKGROUND: In parallel with the progress in neurosurgery, improvements in residents' training strategies have been reported. Increasing focus has been placed on residents' participation in research. Previous studies analyzed neurosurgery residents' contributions to research activities, time dedicated to research, and outcomes. However, few studies investigating these aspects outside the United States are present in the literature. METHODS: A 3-section survey was sent to neurosurgery residents in Italy to determine the current opinion, perceptions, and experiences in the research field. A review of the pertinent literature was carried out. RESULTS: Ninety-seven responding residents (response rate of 41.5%) self-reported an average time spent on research of 9.7 ± 11.4 hours/week. In decreasing frequency, residents were working on retrospective cohort studies (27.5%), case reports (21.7%), case series (15.5%), prospective cohort studies (13.4%), and others (16.4%). The most commonly reported factors promoting interest in research were interaction with peers (76.3%), mentorship (70.1%), and conference exposure (52.6%). Reported strategies of program support were heterogeneous with a prevalence for established collaborative agreements (59.8%) and the presence of a study coordinator (37.1%). The most frequently cited limiting factors were regulatory paperwork (70.1%), call schedule (60.8%), and lack of participating students/residents (57.7%). CONCLUSIONS: By describing the current status of Italian residents' participation in research, we provide additional insight into factors supporting research involvement and existing barriers. Strategies for improvement at national and departmental levels are suggested. We encourage further investigations in other countries, to provide useful information in a worldwide framework.