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g., different fixatives), analytical (e.g., antibody clone, staining platforms, inter and intra-observer agreement, cytology-histology concordance) and post-analytical (e.g., clinical outcome) issues. Although promising results in this field have emerged utilizing cytology samples, many important questions still need to be addressed. This review summarizes the literature of PD-L1 IHC in lung cytology specimens and provides practical tips for optimizing analysis.

Despite widespread use, little is known about how adolescents and young adults (AYA) with cancer use social media (SM). This research characterized use and self-reported SM experiences among AYA with cancer.

AYA, aged 12-26 years, receiving cancer care completed a mixed-methods survey regarding SM experiences. Clinical information was obtained from the electronic medical record. Data were analyzed with descriptive statistics, t tests, and qualitative content analysis.

Thirty-nine AYA with average age 16 (SD=3.2) years participated.Most were Caucasian (92%) males (54%). Participants had leukemia/lymphoma (56%), solid tumors (33%), and brain tumors (10%). Nearly all (97%) used SM, with YouTube, Snapchat, and Instagram being the most popular. AYA self-reported lower SM use than their smartphone data indicated (2.8hours/day, SD=1.2 vs 3.4hours/day, SD=1.3; P<0.001). Participants used SM to obtain information about their cancer (45%), post about cancer (47%), and read about others' cancer experience (50%). One-third made a friend with cancer through SM (32%). Qualitative results indicated that AYA had positive cancer-related SM experiences, including feelings of support (54%), community (27%), distraction (8%), and inspiration (8%). Most denied negative experiences (78%); however, 17% reported cyberbullying related to cancer.

AYA with cancer avidly use SM, noting it provides a sense of support and community. However, one-sixth reported cancer-related cyberbullying. AYA oncology providers have an opportunity to enhance positive and blunt negative SM interactions by addressing and guiding SM use in AYA patients.

AYA with cancer avidly use SM, noting it provides a sense of support and community. However, one-sixth reported cancer-related cyberbullying. AYA oncology providers have an opportunity to enhance positive and blunt negative SM interactions by addressing and guiding SM use in AYA patients.

To synthesize existing qualitative research exploring the experiences of parents caring for children with cancer during the end-of-life phase, and the factors that influence parental decision-making when choosing the location of end-of-life care and death for their child.

This review included 15 studies of 460 parents of 333 children and adolescents who died from progressive cancer. Where reported, the majority (58%) of children died at home or in a hospital (39%), with only a small fraction dying in a hospice. Factors impacting decision-making for the location of care included the quality of communication and the quality of care available. Themes related to choosing home for end-of-life care and death included honoring the child's wishes, the familiarity of home, and parents' desire to be their child's primary carer. Preference for the location of death in the hospital included trust in hospital staff, practical logistics, and the safety of the hospital environment.

This review included 15 studies of 460 parents of 333 children and adolescents who died from progressive cancer. Where reported, the majority (58%) of children died at home or in a hospital (39%), with only a small fraction dying in a hospice. Factors impacting decision-making for the location of care included the quality of communication and the quality of care available. Themes related to choosing home for end-of-life care and death included honoring the child's wishes, the familiarity of home, and parents' desire to be their child's primary carer. Preference for the location of death in the hospital included trust in hospital staff, practical logistics, and the safety of the hospital environment.Hypertension is the most common comorbidity in patients with coronavirus disease 2019 (COVID-19) and increases in-hospital mortality. Day-by-day blood pressure (BP) variability (BPV) is associated with clinical outcomes in hypertensive patients. However, little information is available on the association of BPV with the outcomes of COVID-19 patients with hypertension. This study aimed to demonstrate whether day-by-day in-hospital BPV had prognostic significance in these patients. The authors included 702 COVID-19 patients with hypertension from Huoshenshan Hospital (Wuhan, China), who underwent valid in-hospital BP measurements on at least seven consecutive days. Day-by-day BPV was assessed by standard deviation (SD), coefficient of variation (CV), and variation independent of mean (VIM). Overall, patients with severe COVID-19 and non-survivors had higher BPV than moderate cases and survivors, respectively. Additionally, higher BPV was correlated with greater age and higher levels of C-reactive protein, procalcitonin, high-sensitive cardiac troponin I, and B-type natriuretic peptide. In multivariable Cox regression, SD of systolic BP (SBP) was predictive of mortality [hazard ratio (HR) 1.17, 95% confidence interval (CI) 1.05-1.30] as well as acute respiratory distress syndrome (ARDS) (HR 1.09, 95% CI 1.01-1.16). Similar trends were observed for CV and VIM of SBP, but not indices of diastolic BP variability. The authors demonstrated that day-by-day in-hospital SBP variability can independently predict mortality and ARDS in COVID-19 patients with hypertension. And high BPV might be correlated with severe inflammation and myocardial injury. Further studies are needed to clarify whether early reduction of BPV will improve the prognosis of these patients.Peri- and postoperative anastomotic leakage from blood vessel anastomosis is a common and potentially life-threatening complication. As an adjunctive therapy providing an additional layer of safety, a new biodegradable, polyurethane-based adhesive was developed. It consists of two components an isocyanate-functionalized prepolymer and an amino-based curing agent. The adhesive was investigated in a porcine animal model to seal sutured blood vessel anastomoses of arteries, veins, aortas and prosthetic aortic graft replacements. The material-determined properties of the adhesive like viscosity, processing and polymerization time as well as bonding strength were well suited for this application. The adhesive stopped perioperative suture-line bleedings and stayed on all anastomoses until sacrifice. Hematological and serological inflammation marker assessments were unobtrusive. The histological evaluation showed a mild to moderate local tissue reaction to the adhesive constituting a physiological, non-adverse tissue-biomaterial interaction. The adhesive did not interfere with vascular wound healing. The adhesive demonstrated to be suitable to improve the outcome of cardiovascular surgeries by securing the classical sutured anastomoses in a fast, easy and safe manner. However, further studies are required to quantitatively evaluate efficacy in terms of anastomotic leakage prevention as well as long-term tissue compatibility and degradation.Wang and colleagues report a rare anatomic anomaly consisting of an accessory pancreatic lobe which originated from the main pancreatic gland with duodenal duplication in a girl with relapsing pancreatitis. The anomaly was visualized on magnetic resonance cholangiopancreatography before being confirmed on endoscopic retrograde cholangiopancreatography and surgery.The study aimed to make a bibliometric analysis of the current research situation in unilateral biportal endoscopy/biportal endoscopic spinal surgery (UBE/BESS). Research data sets were acquired from the Web of Science database. The study chosed "biportal endoscopic spinal surgery" OR "two portal endoscopic spinal surgery" OR "percutaneous biportal endoscopic decompression" OR "unilateral biportal endoscopy" OR "irrigation endoscopic discectomy" as the search terms. The literature search was limited to articles published before March 5, 2021. We only included original articles and reviews. VOS viewer and Citespace software were used to analyze the data and generate visualization knowledge maps. Annual trend of publications, distribution, H-index status, co-authorship status, and research hotspots were analyzed. A total of 74 publications met the requirement. The sum number of citations was 31,204, in which 19,336 were no self-citations. The average citation of all the papers was 21.84 times. The H-index of aly, not only in quality, but also in quantity. Barun Hosp and Leon Wiltse Mem Hosphave published most articles. Choi is the most productive author. World Neurosurgery is the most productive journal. Spondylolisthesis and endoscopic decompression are the research hotspots in recent years. Indeed, this study provides new insight into the growth and development of UBE/BESS.Relapsed central nervous system (CNS) leukemia presents a therapeutic challenge to pediatric oncologists. Systemic monoclonal antibody therapy has shown recent promise in patients with relapsed acute lymphoblastic leukemia, however its effect on CNS disease in this population is not well established. We describe a case of multiply relapsed and refractory CNS leukemia in an adolescent patient who responded to the intra-CNS delivery of rituximab (anti-CD20) and epratuzumab (anti-CD22) therapy, demonstrating the practical use and potential efficacy of a novel route of monoclonal antibody administration in difficult-to-treat CNS leukemia.Progressive transformation of the germinal center (PTGC) is a common and underrecognized cause of pediatric lymphadenopathy. PTGC may be associated with numerous systemic medical conditions that require further workup and management, including malignancy, autoimmune conditions, lymphoproliferative conditions, immunodeficiency, and infection. Given the breadth and rarity of the associated conditions, workup should be tailored to the individual patient and occur in a tiered approach. Patients with PTGC require ongoing follow-up, given their long-term risk of malignancy and recurrent PTGC.The emergence of antibiotic-resistant strains of Helicobacter pylori necessitates the development of novel therapeutic strategies to fight against its infection. Recently, the enzyme inosine-5'-monophosphate dehydrogenase (IMPDH) has emerged as a promising target to treat bacterial infections due to its crucial role in the de novo purine biosynthesis pathway. The differences between the prokaryotic and eukaryotic IMPDHs, in the NAD+ binding domain and flap region, allow the identification of pathogen-specific inhibitors. In the present study, seven point mutants of wild type Helicobacter pylori IMPDH are constructed by site-directed mutagenesis, and characterized using in silico and kinetic studies. Point mutations in the NAD+ binding domain and the flap region are shown to impart significant changes in the enzyme's structure and function. In addition, the product inhibition characteristics of the Arg396-Tyr397 dyad (RY dyad) show that both the residues are important for water activation in the reaction. The results obtained are beneficial for the design and development of small-molecule inhibitors, capable of species-specific inhibition.