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1.
BMC Public Health ; 23(1): 796, 2023 04 28.
Article in English | MEDLINE | ID: mdl-37118761

ABSTRACT

BACKGROUND: The COVID-19 pandemic accelerated the spread of misinformation worldwide. The purpose of this study was to explore perceptions of misinformation and preferred sources of obtaining COVID-19 information from those living in Canada. In particular, we sought to explore the perceptions of East Asian individuals in Canada, who experienced stigma related to COVID-19 messaging. METHODS: We conducted a qualitative thematic analysis study. Interviews were offered in English, Mandarin and Cantonese. Interviewers probed for domains related to knowledge about COVID-19, preferred sources of information, perceived barriers and facilitators of misinformation, and preferences for communication during a health emergency. Interviews were recorded, translated, transcribed verbatim and analyzed using a framework approach. Transcripts were independently double-coded until > 60% agreement was reached. This study received research ethics approval. RESULTS: Fifty-five interviews were conducted. The majority of participants were women (67%); median age was 52 years. 55% of participants were of East-Asian descent. Participants obtained information about COVID-19 from diverse English and non-English sources including news media, government agencies or representatives, social media, and personal networks. Challenges to seeking and understanding information included: encountering misinformation, making sense of evolving or conflicting public health guidance, and limited information on topics of interest. 65% of participants reported encountering COVID-19  misinformation. East Asian participants called on government officials to champion messaging to reduce stigmatizing and racist rhetoric and highlighted the importance of having accessible, non-English language information sources. Participants provided recommendations for future public health communications guidance during health emergencies, including preferences for message content, information messengers, dissemination platforms and format of messages. Almost all participants preferred receiving information from the Canadian government and found it helpful to utilize various mediums and platforms such as social media and news media for future risk communication, urging for consistency across all platforms. CONCLUSIONS: We provide insights on Canadian experiences navigating COVID-19 information, where more than half perceived encountering misinformation on platforms when seeking COVID-19 information . We provide recommendations to inform public health communications during future health emergencies.


Subject(s)
COVID-19 , Social Media , Female , Humans , Male , Middle Aged , Public Opinion , Emergencies , Pandemics , Canada/epidemiology , Communication
2.
Endoscopy ; 54(7): 712-722, 2022 07.
Article in English | MEDLINE | ID: mdl-35636453

ABSTRACT

The European Society of Gastrointestinal Endoscopy and United European Gastroenterology have defined performance measures for upper and lower gastrointestinal, pancreaticobiliary, and small-bowel endoscopy. Quality indicators to guide endoscopists in the growing field of advanced endoscopy are also underway. We propose that equal attention is given to developing the entire advanced endoscopy team and not the individual endoscopist alone.We suggest that the practice of teams intending to deliver high quality advanced endoscopy is underpinned by six crucial principles concerning: selection, acceptance, complications, reconnaissance, envelopment, and documentation (SACRED).


Subject(s)
Gastroenterology , Quality Improvement , Documentation , Endoscopy, Gastrointestinal , Humans , Intestine, Small
3.
Org Biomol Chem ; 20(33): 6562-6565, 2022 08 24.
Article in English | MEDLINE | ID: mdl-35903995

ABSTRACT

Chitin-derived platforms are emerging as valuable chemical entities for the construction of nitrogenous fine chemicals in processes independent of Haber ammonia. However, much of the work in this area has focused on achiral platforms that limit routine entry into enantiopure, bio-based N-chemical space. Herein, dihydroxyethyl acetamidofuran (Di-HAF), a chiral synthon readily available from chitin, has been transformed into the marine alkaloid epi-leptosphaerin. This work extends the fledgling Haber-independent synthesis concept to enantiopure chemical space not routinely accessible from existing achiral platforms.


Subject(s)
Alkaloids , Antineoplastic Agents , Chitin , Nitrogen , Stereoisomerism
4.
Gut ; 70(5): 876-883, 2021 05.
Article in English | MEDLINE | ID: mdl-33139268

ABSTRACT

OBJECTIVE: We aimed to determine the predictive capacity and diagnostic yield of a 10-fold increase in serum IgA antitissue transglutaminase (tTG) antibody levels for detecting small intestinal injury diagnostic of coeliac disease (CD) in adult patients. DESIGN: The study comprised three adult cohorts. Cohort 1: 740 patients assessed in the specialist CD clinic at a UK centre; cohort 2: 532 patients with low suspicion for CD referred for upper GI endoscopy at a UK centre; cohort 3: 145 patients with raised tTG titres from multiple international sites. Marsh 3 histology was used as a reference standard against which we determined the performance characteristics of an IgA tTG titre of ≥10×ULN for a diagnosis of CD. RESULTS: Cohort 1: the sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) for IgA tTG levels of ≥10×ULN at identifying individuals with Marsh 3 lesions were 54.0%, 90.0%, 98.7% and 12.5%, respectively. Cohort 2: the sensitivity, specificity, PPV and NPV for IgA tTG levels of ≥10×ULN at identifying individuals with Marsh 3 lesions were 50.0%, 100.0%, 100.0% and 98.3%, respectively. Cohort 3: the sensitivity, specificity, PPV and NPV for IgA tTG levels of ≥10×ULN at identifying individuals with Marsh 3 lesions were 30.0%, 83.0%, 95.2% and 9.5%, respectively. CONCLUSION: Our results show that IgA tTG titres of ≥10×ULN have a strong predictive value at identifying adults with intestinal changes diagnostic of CD. This study supports the use of a no-biopsy approach for the diagnosis of adult CD.


Subject(s)
Celiac Disease/diagnosis , Immunoglobulin A/blood , Transglutaminases/blood , Adolescent , Adult , Biomarkers/blood , Diagnosis, Differential , Endoscopy, Gastrointestinal , Humans , Male , Middle Aged , Predictive Value of Tests , Sensitivity and Specificity , United Kingdom
5.
Parasitology ; 148(2): 198-205, 2021 02.
Article in English | MEDLINE | ID: mdl-32951620

ABSTRACT

The magnetic resonance imaging (MRI) appearance of the brain and spinal cord in humans with neuroangiostrongyliasis (NA) due to Angiostrongylus cantonensis infection has been well reported. Equivalent studies in animals are lacking. This case series describes clinical and MRI findings in 11 dogs with presumptively or definitively diagnosed NA. MRI of the brain and/or spinal cord was performed using high-field (1.5 T) or low-field (0.25 T) scanners using various combinations of transverse, sagittal, dorsal and three-dimensional (3D) T1-weighted (T1W), transverse, sagittal and dorsal T2-weighted (T2W), T2W fluid-attenuated inversion recovery (FLAIR) and T2*-weighted (T2*W) gradient echo (GRE), dorsal T2W short tau inversion recovery (STIR) and post-gadolinium transverse, sagittal, dorsal and 3D T1W and transverse T2W FLAIR sequences. In 4/6 cases where the brain was imaged, changes consistent with diffuse meningoencephalitis were observed. Evidence of meningeal involvement was evident even when not clinically apparent. The spinal cord was imaged in 9 dogs, with evidence of meningitis and myelitis detected in regions consistent with the observed neuroanatomical localization. Pathognomonic changes of neural larva migrans, as described in some human patients with NA, were not detected. NA should be considered in the differential diagnosis of dogs with MRI evidence of focal or diffuse meningitis, myelitis and/or encephalitis, especially in areas where A. cantonensis is endemic. If not precluded by imaging findings suggestive of brain herniation, cerebrospinal fluid (CSF) collection for cytology, fluid analysis, real-time polymerase chain reaction (qPCR) and enzyme-linked immunosorbent assay (ELISA) testing should be considered mandatory in such cases after the MRI studies.


Subject(s)
Dog Diseases/diagnostic imaging , Magnetic Resonance Imaging/veterinary , Strongylida Infections/veterinary , Angiostrongylus cantonensis/physiology , Animals , Dog Diseases/parasitology , Dogs , Female , Male , Meningitis/diagnostic imaging , Meningitis/parasitology , Meningitis/veterinary , Meningoencephalitis/diagnostic imaging , Meningoencephalitis/parasitology , Meningoencephalitis/veterinary , Strongylida Infections/diagnostic imaging , Strongylida Infections/parasitology
6.
Orthod Craniofac Res ; 24(3): 360-369, 2021 Aug.
Article in English | MEDLINE | ID: mdl-33217159

ABSTRACT

BACKGROUND: The present study compared the treatment changes in the upper airway, hyoid bone position and craniofacial morphology between two groups of children with skeletal class II malocclusion treated with the headgear activator (HGA) and Herbst appliance (Herbst). SETTING AND SAMPLE POPULATION: Orthodontic population from the Faculty of Dentistry of the University of Hong Kong. METHODS: Thirty-four skeletal class II patients treated with the HGA (17 patients, mean age 10.6 ± 1.5 years) and the Herbst (17 patients, mean age 11.0 ± 1.4 years) were matched for sex, age, overjet, skeletal class and mandibular divergence. The patients received lateral cephalometric radiographs (LCRs) at the beginning of treatment (T1 ), after treatment (T2 ) and at follow-up (T3 ). In the HGA group, patients underwent LCRs 7 months before the beginning of treatment (T0 ), which were used as growth reference for intra-group comparison. Paired Student's t tests were used for intra- and inter-group comparisons (α = .05). RESULTS: Treatment changes (T2 -T1 ) did not differ significantly between the groups. However, at follow-up (T3 -T1 ) the Herbst group showed a smaller increase than the HGA group in the vertical position of the hyoid bone relative to the Frankfort plane (P = .013) and mandibular plane (P = .013). CONCLUSIONS: There were no significant differences in the upper airway, hyoid bone position and craniofacial morphology between the groups at the end of treatment. However, the Herbst may provide better long-term control of the vertical position of the hyoid bone than the HGA in children with skeletal class II malocclusion.


Subject(s)
Malocclusion, Angle Class II , Orthodontic Appliances, Functional , Cephalometry , Child , Humans , Hyoid Bone/diagnostic imaging , Malocclusion, Angle Class II/diagnostic imaging , Malocclusion, Angle Class II/therapy , Retrospective Studies
7.
Am J Gastroenterol ; 113(8): 1238-1246, 2018 08.
Article in English | MEDLINE | ID: mdl-29915400

ABSTRACT

OBJECTIVES: Celiac disease (CD) is common yet under-detected. A point of care test (POCT) may improve CD detection. We aimed to assess the diagnostic performance of an IgA/IgG-deamidated gliadin peptide (DGP)-based POCT for CD detection, patient acceptability, and inter-observer variability of the POCT results. METHODS: From 2013-2017, we prospectively recruited patients referred to secondary care with gastrointestinal symptoms, anemia and/or weight loss (group 1); and patients with self-reported gluten sensitivity with unknown CD status (group 2). All patients had concurrent POCT, IgA-tissue transglutaminase (IgA-TTG), IgA-endomysial antibodies (IgA-EMA), total IgA levels, and duodenal biopsies. Five hundred patients completed acceptability questionnaires, and inter-observer variability of the POCT results was compared among five clinical staff for 400 cases. RESULTS: Group 1: 1000 patients, 58.5% female, age 16-91, median age 57. Forty-one patients (4.1%) were diagnosed with CD. The sensitivities of the POCT, IgA-TTG, and IgA-EMA were 82.9, 78.1, and 70.7%; the specificities were 85.4, 96.3, and 99.8%. Group 2: 61 patients, 83% female; age 17-73, median age 35. The POCT had 100% sensitivity and negative predictive value in detecting CD in group 2. Most patients preferred the POCT to venepuncture (90.4% vs. 2.8%). There was good inter-observer agreement on the POCT results with a Fleiss Kappa coefficient of 0.895. CONCLUSIONS: The POCT had comparable sensitivities to serology, and correctly identified all CD cases in a gluten sensitive cohort. However, its low specificity may increase unnecessary investigations. Despite its advantage of convenience and rapid results, it may not add significant value to case finding in an office-based setting.


Subject(s)
Celiac Disease/diagnosis , Gliadin/immunology , Point-of-Care Testing/standards , Adolescent , Adult , Aged , Aged, 80 and over , Antibodies/immunology , Celiac Disease/blood , Female , Humans , Immunoglobulin A/immunology , Immunoglobulin G/immunology , Male , Middle Aged , Reproducibility of Results , Sensitivity and Specificity , Young Adult
8.
Am J Gastroenterol ; 112(12): 1859-1867, 2017 Dec.
Article in English | MEDLINE | ID: mdl-29016564

ABSTRACT

OBJECTIVES: Mucosal healing is important in celiac disease (CD) for the prevention of complications. However, obtaining duodenal biopsies is invasive, and there is currently no reliable surrogate marker for histological remission in clinical practice. We aimed to assess the role of a point-of-care test (POCT) based on IgA/IgG-deamidated gliadin peptide, in detecting persistent villous atrophy (VA) in CD. METHODS: We prospectively recruited patients with CD attending endoscopy for the assessment of histological remission. All patients had IgA-endomysial (EMA) antibodies, IgA-tissue transglutaminase (TTG) antibodies, and the POCT performed, and completed a validated dietary adherence questionnaire. A gastroscopy was performed in all patients, with four biopsies taken from the second part of the duodenum and one from the duodenal bulb. We compared the diagnostic performance of the surrogate markers against duodenal histology as the reference standard. RESULTS: A total of 217 patients with CD (70% female, age range 16-83 years, median age 53 years) on a gluten-free diet (median duration 6 years) were recruited from 2013 to 2017. Eighty-five (39.2%) patients had persistent VA. The sensitivities of the POCT, TTG, EMA, and the adherence score in detecting VA were 67.1%, 44.7%, 37.7%, and 24.7% respectively (P=0.0005). The combination of the POCT and adherence score only marginally increased the sensitivity to 70.6% (59.7-80.0%). CONCLUSIONS: The sensitivity of the POCT was higher than the other surrogate markers in predicting VA. A POCT may provide the additional advantage of an immediate objective assessment of mucosal healing at the time of an office-based follow-up consultation.


Subject(s)
Celiac Disease/metabolism , Diet, Gluten-Free , Gliadin/immunology , Immunoglobulin A/metabolism , Immunoglobulin G/metabolism , Point-of-Care Testing , Adolescent , Adult , Aged , Aged, 80 and over , Atrophy , Celiac Disease/pathology , Celiac Disease/prevention & control , Female , Gastroscopy , Humans , Intestinal Mucosa/metabolism , Intestinal Mucosa/pathology , Male , Middle Aged , Patient Compliance , Sensitivity and Specificity , Surveys and Questionnaires , Transglutaminases/metabolism , Young Adult
9.
Curr Opin Gastroenterol ; 33(3): 173-180, 2017 May.
Article in English | MEDLINE | ID: mdl-28177956

ABSTRACT

PURPOSE OF REVIEW: The diagnostic approach in celiac disease is continuously evolving as our understanding of its pathophysiology improves. This review aims to provide a summary of contemporary work that supports optimization of the diagnosis of this common yet underdiagnosed condition. RECENT FINDINGS: The recently updated National Institute of Clinical Excellence and European Society for Pediatric Gastroenterology, Hepatology, and Nutrition guidelines and the contentious biopsy-free diagnostic approach will be discussed. We will review the evidence advocating optimal biopsy techniques such as single bite biopsy and controversial bulb biopsy sampling to increase diagnostic yield. Recent data providing phenotypical characterization and clinical outcomes of celiac subtypes such as potential celiac disease, seronegative celiac disease and ultrashort celiac disease will be covered. We will present emerging evidence on novel case finding strategies with point of care tests. Promising novel markers for celiac disease such as serum intestinal fatty acid binding protein and in-vitro gluten challenge will be included. SUMMARY: Recent work has demonstrated the clinical significance of the celiac disease subtypes, emphasizing the importance of careful diagnosis and recognition. There is a move toward a less invasive and perhaps more cost-effective diagnostic approach in celiac disease, but duodenal biopsy remains the gold standard at present for all adults and the majority of pediatric patients.


Subject(s)
Celiac Disease/diagnosis , Biomarkers/blood , Biopsy , Celiac Disease/diet therapy , Celiac Disease/pathology , Diet, Gluten-Free , Duodenoscopy , Duodenum/pathology , Histocompatibility Testing , Humans , Mass Screening/methods , Point-of-Care Testing , Practice Guidelines as Topic
10.
Intern Med J ; 47(10): 1190-1196, 2017 Oct.
Article in English | MEDLINE | ID: mdl-28675639

ABSTRACT

BACKGROUND/AIMS: To determine the prevalence of psychological distress in Australian junior medical officers (JMO) and investigate the determinants associated with psychological distress over a 3-year (2014-2016) period. METHODS: JMO were surveyed using the 2014-2016 JMO Census (n = 220, 399 and 466 each year; response rate approximately 15%). Levels of psychological distress were assessed using the Kessler Psychological Distress Scale (K10). A K10 ≥ 25 was chosen to indicate high psychological distress, and this determinant was compared to various demographic and work-related factors. RESULTS: Australian JMO experience a high level of psychological distress (mean: 18.1, median 16.0). There were no differences in demographical variables, such as age, gender, marital status, dependants and between postgraduate years 1 and 2. Increasing hours worked per week was associated with a higher K10, with every hour worked increasing odds by 3%. Attitudinal items, including feeling unwilling to study medicine again, feeling poorly trained and experiences of bullying, were related to high psychological distress. Coping strategies like exercise and spending time with friends correlated positively with lower distress, while time off work, frequent alcohol use, smoking and drug use were associated with increased distress levels. Of those with a high K10, 54.5% indicated that they did not use any form of professional support; 17.83% expressed that given their time again, they would not choose to study medicine. CONCLUSION: A focused approach to JMO support and education regarding significant risk factors identified is likely to assist health policies that aim to improve the mental well-being of Australian JMO.


Subject(s)
Medical Staff, Hospital/psychology , Stress, Psychological/epidemiology , Stress, Psychological/psychology , Australia/epidemiology , Cross-Sectional Studies , Female , Humans , Male , Prevalence , Stress, Psychological/diagnosis , Surveys and Questionnaires
11.
Rev Esp Enferm Dig ; 109(11): 741-742, 2017 11.
Article in English | MEDLINE | ID: mdl-29082741

ABSTRACT

One of the challenges in coeliac disease is the significant under-diagnosis despite the increasing prevalence and international guidelines for serological screening in appropriate patient cohorts. Several point-of-care tests for coeliac disease have been developed over the past decade with the aim of improving case detection using rapid and convenient testing. Most point-of-care tests, such as Biocard, detect anti-tissue transglutaminase (tTG) IgA antibodies, whereas Simtomax uniquely detects anti-deamidated gliadin peptide (DGP) IgA/IgG antibodies. A recent head-to-head trial in adults comparing two tTG-based point-of-care tests (Biocard and Celiac Quick Test) and Simtomax found that Simtomax was superior to Biocard and Celiac Quick Test, with sensitivities of 92.7%, 72.2% and 77.8%, respectively.


Subject(s)
Celiac Disease , Adult , Child , Gliadin , Humans , Immunoglobulin A , Immunoglobulin G , Peptides , Point-of-Care Systems , Point-of-Care Testing
12.
BMC Gastroenterol ; 16: 115, 2016 Sep 15.
Article in English | MEDLINE | ID: mdl-27628523

ABSTRACT

BACKGROUND: International guidelines recommend coeliac serology in iron deficiency anaemia, and duodenal biopsy for those tested positive to detect coeliac disease. However, pre-endoscopy serology is often unavailable, thus committing endoscopists to take routine duodenal biopsies. Some endoscopists consider duodenal biopsy mandatory in anaemia to exclude other pathologies. We hypothesise that using a point of care test at endoscopy could fill this gap, by providing rapid results to target anaemic patients who require biopsies, and save costs by biopsy avoidance. We therefore assessed three key aspects to this hypothesis: 1) the availability of pre-endoscopy serology in anaemia; 2) the sensitivities and cost effectiveness of pre-endoscopy coeliac screening with Simtomax in anaemia; 3) whether other anaemia-related pathologies could be missed by this targeted-biopsy approach. METHODS: Group 1: pre-endoscopy serology availability was retrospectively analysed in a multicentre cohort of 934 anaemic patients at 4 UK hospitals. Group 2: the sensitivities of Simtomax, endomysial and tissue-transglutaminase antibodies were compared in 133 prospectively recruited patients with iron deficiency anaemia attending for a gastroscopy. The sensitivities were measured against duodenal histology as the reference standard in all patients. The cost effectiveness of Simtomax was calculated based on the number of biopsies that could have been avoided compared to an all-biopsy approach. Group 3: the duodenal histology of 153 patients presenting to a separate iron deficiency anaemia clinic were retrospectively reviewed. RESULTS: In group 1, serology was available in 361 (33.8 %) patients. In group 2, the sensitivity and negative predictive value (NPV) were 100 % and 100 % for Simtomax, 96.2 % and 98.9 % for IgA-TTG, and 84.6 % and 96.4 % for EMA respectively. In group 3, the duodenal histology found no causes for anaemia other than coeliac disease. CONCLUSION: Simtomax had excellent diagnostic accuracy in iron deficiency anaemia and was comparable to conventional serology. Duodenal biopsy did not identify any causes other than coeliac disease for iron deficiency anaemia, suggesting that biopsy avoidance in Simtomax negative anaemic patients is unlikely to miss other anaemia-related pathologies. Due to its 100 % NPV, Simtomax could reduce unnecessary biopsies by 66 % if only those with a positive Simtomax were biopsied, potentially saving £3690/100 gastroscopies. TRIAL REGISTRATION: The group 2 study was retrospectively registered with clinicaltrials.gov. Trial registration date: 13(th) July 2016; TRIAL REGISTRATION NUMBER: NCT02834429 .


Subject(s)
Anemia, Iron-Deficiency/blood , Celiac Disease/diagnosis , Point-of-Care Testing/economics , Point-of-Care Testing/statistics & numerical data , Preoperative Care/methods , Adolescent , Adult , Aged , Aged, 80 and over , Anemia, Iron-Deficiency/etiology , Anemia, Iron-Deficiency/surgery , Biopsy , Celiac Disease/complications , Celiac Disease/surgery , Cost Savings , Duodenum/pathology , Female , Gastroscopy , Gliadin/blood , Humans , Immunoglobulin A/blood , Immunoglobulin G/blood , Male , Middle Aged , Models, Economic , Peptides/blood , Predictive Value of Tests , Preoperative Care/economics , Prospective Studies , Retrospective Studies , Sensitivity and Specificity , Serologic Tests/economics , Serologic Tests/methods , Serologic Tests/statistics & numerical data , United Kingdom , Young Adult
13.
Practitioner ; 260(1795): 13-7, 2016.
Article in English | MEDLINE | ID: mdl-28994553

ABSTRACT

The common presentation of coeliac disease has shifted from the historically classical symptoms of malabsorption in childhood to non-classical symptoms in adulthood such as irritable bowel syndrome-type symptoms, anaemia, chronic fatigue, change in bowel habit, abdominal pain and osteoporosis. A combination of coeliac serology and duodenal biopsy is required to diagnose coeliac disease in adults. Testing for IgA-tissue transglutaminase antibodies should be carried out as a first-line screening test. Advise patients to eat a gluten-containing diet for six weeks before their investigations to ensure the serological and histological results are not affected. A confirmatory duodenal biopsy is mandatory to ensure that patients are correctly diagnosed with coeliac disease. A lifelong strict gluten-free diet is the only effective treatment currently available. All patients should be referred to a specialist dietitian for guidance and support. Annual follow-up can begin when the disease is stable and patients are managing well on their diet.


Subject(s)
Celiac Disease/diagnosis , Celiac Disease/immunology , Immunoglobulin A/blood , Adult , Biomarkers/blood , Celiac Disease/diet therapy , Celiac Disease/pathology , Humans , Intestinal Mucosa/pathology , Intestine, Small/pathology , Transglutaminases/immunology
14.
Support Care Cancer ; 21(8): 2229-35, 2013 Aug.
Article in English | MEDLINE | ID: mdl-23503800

ABSTRACT

PURPOSE: The incorporation of three-dimensional (3D) planning for the treatment of bone metastases has been embraced in many North American practices with assumed superior tumor targeting, sparing of normal structures, and improvement in patient outcomes. The goal of our project was to evaluate the dosimetric and clinical impact of 3D vs. two-dimensional (2D) planning for patients who require simple palliative radiotherapy techniques (≤ 2 beams) for bone metastases. METHODS: Patients undergoing palliative radiation therapy for bone metastases were eligible. The study oncologists first documented the intended treatment target, defined the treatment target/field using digital radiographs (2D), followed by using full 3D planning computerized tomography volumetric datasets. Treatment plans were compared dosimetrically, and patient-reported outcomes (pain, fatigue, anorexia, and nausea) were compared against a historical cohort treated with 2D plans. RESULTS: Eighty-five patients were enrolled in the study group. Review of the 3D datasets led to changes in the target area of interest in 44/85 (52 %) of cases, of which 21/85 (25 %) were clinically significant. 3D plans resulted in superior target coverage and normal tissue sparing. There was no significant difference in patient-reported outcomes however. CONCLUSION: 3D radiotherapy planning resulted in superior treatment plans but we were unable to demonstrate a significant benefit in clinical outcomes. Prospective study designs are needed to describe the contemporary expectation of palliative radiotherapy for bone metastases in the modern era of 3D planning.


Subject(s)
Bone Neoplasms/radiotherapy , Palliative Care/methods , Radiotherapy Planning, Computer-Assisted/methods , Radiotherapy, Conformal/methods , Adult , Aged , Aged, 80 and over , Anorexia/etiology , Bone Neoplasms/secondary , Fatigue/etiology , Female , Humans , Male , Middle Aged , Nausea/etiology , Pain/etiology , Prospective Studies , Radiotherapy Dosage , Radiotherapy Planning, Computer-Assisted/adverse effects , Radiotherapy, Conformal/adverse effects
15.
Cureus ; 15(1): e33367, 2023 Jan.
Article in English | MEDLINE | ID: mdl-36751182

ABSTRACT

Primary cardiac tumors are rare because metastatic lesions from distant sites account for most masses. We are reporting two cases of malignant intracardiac masses with their diagnostic dilemma. Our first patient is a 72-year-old male with a pertinent history of desmoplastic and spindle cell melanoma who presented after his surveillance positron emission tomography (PET) scan showed a hypermetabolic lesion in the inferior pericardium. The initial impression for this mass is recurrent malignant melanoma. After an initial negative endometrial biopsy, the patient underwent debulking surgery, and pathology revealed high-grade spindle cell sarcoma. The patient underwent chemotherapy but had a disease progression and ultimately elected hospice care. Our second patient is a 75-year-old male with a history of stage IB adenocarcinoma of the lung who presented with progressive dyspnea. An echocardiogram revealed a moderate-sized left ventricular mass. Initial assessment based on tumor morphology and location suggested possible cardiac sarcoma. However, the patient's subsequent cardiac biopsy revealed small cell carcinoma, likely of primary cardiac origin, as no other primary nidus of the tumor was seen. Based on this result, the patient has been started on carboplatin, etoposide, and atezolizumab and responded well as of the writing of this manuscript. Given the rarity of malignant primary cardiac tumors and their variable clinical presentation, intracardiac masses are often diagnosed incidentally. In addition, given the high risk of biopsy for intracardiac masses, a presumptive diagnosis is rendered via imaging techniques. However, most of these tumors have no pathognomonic imaging findings, and their diagnosis relies heavily on physician interpretation and experience. Our case series illustrated the unpredictable nature of noninvasive methods and that even endometrial biopsy can return a false negative. Therefore, it is essential to be persistent in obtaining a pathological diagnosis, especially if the clinical picture is unclear. While these more invasive methods present the challenge of identifying whether the procedure is truly needed and locating a skilled operator, it could change the diagnosis entirely and open the patient up to new therapies.

16.
Sci Rep ; 13(1): 12298, 2023 07 29.
Article in English | MEDLINE | ID: mdl-37516815

ABSTRACT

Hemophagocytic Lymphohistiocytosis (HLH) is a group of disorders culminating in systemic inflammation and multi-organ failure with high incidence of hepatic dysfunction. Overproduction of IFN-γ is the main immunopathological driver in this disorder. Monokine induced by IFN-γ (CXCL9) serves as a biomarker for disease activity and response to treatment in this disorder. However, very little is understood about the actual functional role of CXCL9 in pathogenesis in HLH. In the current study, we sought to determine the role of CXCL9 in pathogenesis in murine models of both Familial HLH (prf1-/-) and Toll Like Receptor (TLR) 9 repeated stimulation induced Macrophage Activation Syndrome (MAS), a form of secondary HLH. FHL and MAS were induced in both CXCL9 genetically deficient mice (cxcl9-/-) and controls as well as using AMG487, a pharmacological antagonist of the CXCL9 receptor, CXCR3. Results showed that CXCL9 genetic deficiency did not improve disease parameters or hepatitis in both models. Consistent with genetic ablation of CXCL9, inhibition of its receptor, CXCR3, by AMG487 did not show any significant effects in the FHL model. Taken together, inhibition of CXCL9-CXCR3 interaction does not ameliorate HLH physiology in general, or hepatitis as a classical target organ of disease.


Subject(s)
Hepatitis A , Lymphohistiocytosis, Hemophagocytic , Animals , Mice , Acetamides , Disease Models, Animal , Lymphohistiocytosis, Hemophagocytic/genetics , Receptors, CXCR3
17.
BMC Glob Public Health ; 1(1): 26, 2023.
Article in English | MEDLINE | ID: mdl-38798820

ABSTRACT

Background: The COVID-19 pandemic fueled stigmatization and discrimination, particularly towards individuals of Chinese or East Asian ethnicity. We conducted interviews with members of the public in Canada in order to describe and understand stigma perceptions and experiences during the COVID-19 pandemic. Methods: We used a phenomenological approach to describe stigma experiences of Canadian residents during the COVID-19 pandemic and compared the stigma perceptions and experiences of East Asian and non-East Asian individuals. Participants were invited to take part in a single, semi-structured interview. The interview guide was rooted in the Health Stigma and Discrimination Framework (HSDF). Interviews were conducted in English, Mandarin, and Cantonese. Following participant consent, interviews were audio recorded and transcribed verbatim. Data were double coded and analyzed using qualitative content analysis guided by a framework approach. Results: A total of 55 interviews were conducted between May and December 2020. Fifty-five percent of the sample identified as East Asian, 67.3% identified as women, and mean age was 52 years (range 20-76). Fear of infection, fear of social and economic ramifications, and blame for COVID-19 were reported drivers of stigma. Participants described preexisting perceptions on cultural norms and media influence as facilitators of stigma that propagated harmful stereotypes, particularly against Chinese and East Asian individuals. Participants observed or experienced stigmatization towards place of residence, race/ethnicity, culture, language, occupation, and age. Stigma manifestations present in the public and media had direct negative impacts on East Asian, particularly Chinese, participants, regardless of whether or not they personally experienced discrimination. Conclusions: We used the HSDF as a rooting framework to describe perceptions and impact of stigma, particularly as they related to race/ethnicity-based stigmatization in Canada. Participants reported a number of drivers and facilitators of stigma that impacted perceptions and experiences. These findings should be used to develop sustained strategies to mitigate stigma during public health emergencies or other major crises. Supplementary Information: The online version contains supplementary material available at 10.1186/s44263-023-00020-7.

18.
BMJ Open ; 12(11): e062361, 2022 11 15.
Article in English | MEDLINE | ID: mdl-36379653

ABSTRACT

OBJECTIVE: To assess the risks and benefits of reverse mentoring of consultants by junior doctors. DESIGN: A feasibility study divided into two phases: first a semistructured interview where performance of participating consultants was assessed by junior doctors and then a second phase allowing for feedback to be given on a one-to-one basis. Data collected through questionnaires with free text questions and Likert scores. SETTING: Tertiary teaching hospital in the UK. PARTICIPANTS: Six junior doctors (66.6% male, age range 31-40 years) and five consultants (80% male, age range 35-65 years and consultants for 5-20 years). INTERVENTION: Reverse mentoring session. MAIN OUTCOME MEASURE: The concerns and/or benefits of the process of reverse mentoring. Confidence was assessed in 7 domains: clinical practice, approach to juniors, approachability, use of technology, time management, strengths and areas for improvement using Likert scales giving a total out of 35. RESULTS: The most common concerns cited were overcoming the hierarchical difference and a selection bias in both mentors and mentees. However, no participant experienced this hierarchical difference through the reverse mentoring process and no relationships were negatively affected. Mentors became more confident in feeding back to seniors (23 vs 29 out of 35, p=0.04) most evident in clinical practice and areas to improve (3 vs 4 out of 5, p=0.041 and 3 vs 5 out of 5, p=0.041, respectively). CONCLUSION: We present the first study of reverse mentoring in an NHS clinical setting. Initial concerns with regard to damaged relationships and hierarchical gradients were not experienced and all participants perceived that they benefited from the process. Reverse mentoring can play a role in engaging and training future leaders at junior stages and provide a means for consultants to receive valuable feedback from junior colleagues.


Subject(s)
Mentoring , Mentors , Male , Humans , Adult , Female , State Medicine , Feasibility Studies , Program Evaluation
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