Mass casualty incidents, by nature of their scale and unpredictability, can rapidly overwhelm health infrastructure. Preparation is the key to managing these crises with the lowest risk to emergency and health personnel, while providing maximal life saving measures. We present an overview of the multitiered planning that should go into forming a well set out emergency response plan and one that is capable of being adapted to a wide range of mass casualty scenarios. We highlight the ethical implications that a healthcare team faces while making challenging decisions rapidly in a high-pressure environment. Radiology trainees should be aware of the response systems in place at their institutions and the role that is expected of them in mass casualty incidents.Hearing loss in pediatric age group is associated with many congenital temporal bone disorders. Aberrant development of various ear structures leads into either conductive or sensorineural hearing loss. Knowledge of the embryology and anatomical details of various compartments of the ear help better understanding of such disorders. In general, abnormalities of external and middle ears result in conductive hearing loss. Whereas abnormalities of inner ear structures lead into sensorineural hearing loss. These abnormalities could occur as isolated or part of syndromes. Temporal bone disorders are a significant cause of morbidity and developmental delays in children. Imaging evaluation of children presented with hearing loss is paramount in early diagnosis and proper management planning. Our aim is to briefly discuss embryology and anatomy of the pediatric petrous temporal bones. The characteristic imaging features of commonly encountered congenital temporal bone disorders and their associated syndromes will be discussed.The golden age of antibiotics has passed, and the threat of untreatable antimicrobial resistant infections is now a reality for many individuals.  https://www.selleckchem.com/products/zeocin.html  Understanding how bacteria resist antimicrobial treatment and regulate gene expression in response to antibiotics is an important step towards combating resistance. In this review we focus on a ubiquitous class of bacterial gene regulators termed regulatory small RNAs (sRNAs) and how they contribute to antimicrobial resistance and tolerance. Small RNAs have notable roles in modulating the composition of the bacterial envelope, and through these functions control intrinsic antimicrobial resistance in many human pathogens. Recent technical advances that allow profiling of the 'sRNA interactome' have revealed a complex post-transcriptional network of sRNA interactions that can be used to identify network hubs and regulatory bottlenecks. Sequence-specific inhibition of these sRNAs with programmable RNA-targeting therapeutics may present avenues for treating antimicrobial resistant pathogens or resensitizing to our current antibiotics.Base editors have drawn considerable academic and industrial attention in recent years because of their ability to alter single DNA bases with precision. However, the existing cytosine and adenine base editors can only install transition mutations. Three recent studies (Kurt et al.,Zhao et al., and Chen et al.) expand the base editing toolbox by developing cytosine transversion base editors.Piwi-interacting RNAs (piRNAs) and PIWI proteins play key functions in a wide range of biological and developmental processes through the regulation of cellular mRNAs, in addition to their role in transposable element (TE) repression. Evolutionary studies indicate that these PIWI functions in mRNA regulatory programs, occurring in both germ and somatic cells, are ancestral. Recent advances have widely expanded our understanding of these functions of PIWI proteins, identifying new mechanisms of action and strengthening their importance through their conservation in distant species. In this review, we discuss the latest findings regarding piRNA/PIWI-dependent mRNA decay in germ cells and during the maternal-to-zygotic transition in embryos combined with new modes of action of PIWI proteins in mRNA stabilization and translational activation and piRNA-independent roles of PIWI proteins in cancer.
  The aim of this study was to evaluate the diagnostic utility of cardiac catheterization and the efficacy of transcatheter intervention in patients with hemoptysis.
 
  Cardiac catheterization may play a role in identifying the etiologies of hemoptysis with the potential for transcatheter intervention.
 
  This was a retrospective study of all the patients who were brought to the pediatric cardiac catheterization laboratory for the indication of hemoptysis over a 15-year period (2006-2020).
 
  Twenty-one patients underwent 28 cardiac catheterizations. The median age was 17.4 years (range 0.3-60.0 years), and the underlying cardiac diagnoses were normal heart n=3, pulmonary hypertension 1, heart transplant 1, pulmonary arteriovenous malformation 1, pulmonary vein disease 3, biventricular congenital heart diseases 5, and single ventricles 7. The diagnostic utility of catheterization was 81% (17/21). At two-thirds (18/28) of catheterizations, transcatheter interventions were performed in 14/21 (67%) patients aortopulmonary collateral embolization 14, aortopulmonary and veno-venous collateral embolization 1, and pulmonary arteriovenous malformation embolization 3. Although recurrent hemoptysis was frequent (50%) post-intervention, the final effectiveness of transcatheter interventions was 79% (11/14 patients). Overall mortality was 19% (4/21), all in those presenting with massive hemoptysis.
 
  Cardiac catheterization was shown to have good diagnostic utility for hemoptysis especially in patients with underlying congenital heart disease. Despite the high mortality and recurrent hemoptysis rate, transcatheter interventions were effective in our cohort.
 Cardiac catheterization was shown to have good diagnostic utility for hemoptysis especially in patients with underlying congenital heart disease. Despite the high mortality and recurrent hemoptysis rate, transcatheter interventions were effective in our cohort.The lichenoid tissue reaction pattern generally signifies cytotoxic damage to the epithelium. When such reaction pattern occurs on vulvar skin or mucosa, the effects can result in considerable morbidity. None of the entities discussed in this review are entirely unique to the vulva, however, some entities may classically occur at this site, while others tend to be widespread diseases that may incidentally affect vulvar skin and mucosa. Given the complex anatomy of the vulva and the bridging of a site showing both keratinizing squamous epithelium and non-keratinizing squamous mucosa, histopathologic features may display variation in presentation. Although identification of a "lichenoid reaction pattern" alone may provide insight into the disease process, understanding of clinical presentation and specific sites of involvement, along with recognition of the nuanced features of the disease entities can help establish a specific diagnosis. Accurate histopathologic diagnoses by pathologists can improve the ability for treating clinicians to implement timely and effective treatment.