1.Upper airway stimulation for obstructive sleep apnoea in Asians: A Singapore sleep centre experience.
Shaun Ray Han LOH ; Adele Chin Wei NG ; Benjamin Kye Jyn TAN ; Brian Sheng Yep YEO ; Jaclyn Yu Ting TEO ; Nurina Binte MOHD ISA ; Maythad UATAYA ; Liang Chye GOH ; Mimi YOW ; Song Tar TOH
Annals of the Academy of Medicine, Singapore 2025;54(5):316-318
2.Computerized metric assessment of glandular tissue volume within the peripheral zone of the prostate using combined magnetic resonance imaging and histopathology: Possible pathophysiological implications on prostate cancer development
John M. WOLPERT ; Caroline PRESSON ; Nathaniel KIMBALL ; Benjamin LIN ; Luis BRANDI ; Naseem HELO ; Werner T. W. de RIESE
Investigative and Clinical Urology 2024;65(4):334-341
Purpose:
Benign prostatic hyperplasia (BPH) and prostate cancer (PCa) are prevalent urological ailments in elderly males. Numerous clinical studies have revealed an invert association between BPH/prostate size and PCa growth. This study investigates the association between prostate size and total glandular tissue volume of the peripheral zone (GVPZ) using a unique blend of magnetic resonance imaging (MRI) and histo-anatomical imaging technique.
Materials and Methods:
Patients were selected who underwent both radical prostatectomy and preoperative MRI scans. MRI scans provided quantitative measurements of prostatic zone dimensions, while histo-anatomical slides yielded quantitative data on glandular density of the peripheral zone (PZ) using imaging software. Integration of MRI and histopathology enabled the assessment of the GVPZ. Statistical analysis identified relationships between total prostate volume (TPV) and GVPZ.
Results:
Seventy-two patients were selected and 40 cc was determined to be the optimal cutoff for small-to-moderate versus large prostates. Once the two subgroups in TPV were formed, the relationship between TPV and GVPZ was found to be highly significant (p<0.001).
Conclusions
The combination of MRI and histopathology offers a novel approach for precise quantification of glandular tissue within the prostatic PZ. This study corroborates the hypothesis of PZ compression via an enlarging transition zone in larger BPH prostates, resulting in PZ glandular atrophy. Given that most PCa originates in the PZ, these results shed light on the potential protective role of larger BPH prostates against PCa growth.
3.Diffuse-Type Histology Is Prognostic for All Siewert Types of Gastroesophageal Adenocarcinoma
Kelly M MAHURON ; Kevin M SULLIVAN ; Matthew C HERNANDEZ ; Yi-Jen CHEN ; Joseph CHAO ; Laleh G MELSTROM ; I. Benjamin PAZ ; Jae Yul KIM ; Rifat MANNAN ; James L. LIN ; Yuman FONG ; Yanghee WOO
Journal of Gastric Cancer 2024;24(3):267-279
Purpose:
The optimal treatment for gastroesophageal junction adenocarcinoma (GEJA) remains controversial. We evaluated the treatment patterns and outcomes of patients with locally advanced GEJA according to the histological type.
Materials and Methods:
We conducted a single-institution retrospective cohort study of patients with locally advanced GEJA who underwent curative-intent surgical resection between 2010 and 2020. Perioperative therapies as well as clinicopathologic, surgical, and survival data were collected. The results of endoscopy and histopathological examinations were assessed for Siewert and Lauren classifications.
Results:
Among the 58 patients included in this study, 44 (76%) were clinical stage III, and all received neoadjuvant therapy (72% chemoradiation, 41% chemotherapy, 14% both chemoradiation and chemotherapy). Tumor locations were evenly distributed by Siewert Classification (33% Siewert-I, 40% Siewert-II, and 28% Siewert-III). Esophagogastrectomy (EG) was performed for 47 (81%) patients and total gastrectomy (TG) for 11 (19%) patients.All TG patients received D2 lymphadenectomy compared to 10 (21%) EG patients.Histopathological examination showed the presence of 64% intestinal-type and 36% diffuse-type histology. The frequencies of diffuse-type histology were similar among Siewert groups (37% Siewert-I, 36% Siewert-II, and 33% Siewert-III). Regardless of Siewert type and compared to intestinal-type, diffuse histology was associated with increased intraabdominal recurrence rates (P=0.03) and decreased overall survival (hazard ratio, 2.33; P=0.02). With a median follow-up of 31.2 months, 29 (50%) patients had a recurrence, and the median overall survival was 50.5 months.
Conclusions
Present in equal proportions among Siewert types of esophageal and gastric cancer, a diffuse-type histology was associated with high intraabdominal recurrence rates and poor survival. Histopathological evaluation should be considered in addition to anatomic location in the determination of multimodal GEJA treatment strategies.
4.Ethnic Differences in the Safety and Efficacy of Tenecteplase Versus Alteplase for Acute Ischemic Stroke: A Systematic Review and Meta-Analysis
Jin Hean KOH ; Claire Yi Jia LIM ; Lucas Tze Peng TAN ; Ching-Hui SIA ; Kian Keong POH ; Vijay Kumar SHARMA ; Leonard Leong Litt YEO ; Andrew Fu Wah HO ; Teddy WU ; William Kok-Fai KONG ; Benjamin Yong Qiang TAN
Journal of Stroke 2024;26(3):371-390
Background:
and Purpose Tenecteplase is a thrombolytic agent with pharmacological advantages over alteplase and has been shown to be noninferior to alteplase for acute ischemic stroke in randomized trials. However, evidence pertaining to the safety and efficacy of tenecteplase in patients from different ethnic groups is lacking. The aim of this systematic review and metaanalysis was to investigate ethnicity-specific differences in the safety and efficacy of tenecteplase versus alteplase in patients with acute ischemic stroke.
Methods:
Following an International Prospective Register of Systematic Reviews (PROSPERO)- registered protocol (CRD42023475038), three authors conducted a systematic review of the PubMed/MEDLINE, Embase, Cochrane Library, and CINAHL databases for articles comparing the use of tenecteplase with any thrombolytic agent in patients with acute ischemic stroke up to November 20, 2023. The certainty of evidence was assessed using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) framework. Two independent authors extracted data onto a standardized data collection sheet. A pairwise meta-analysis was conducted in risk ratios (RR).
Results:
From 34 studies (59,601 participants), the rate of complete recanalization was significantly higher (P<0.01) in Asian (RR: 1.91, 95% confidence interval [CI]: 1.30 to 2.80) versus Caucasian patients (RR: 0.99, 95% CI: 0.87 to 1.14). However, Asian patients (RR: 1.18, 95% CI: 0.87 to 1.62) had significantly higher (P=0.01) rates of mortality compared with Caucasian patients (RR: 1.10, 95% CI: 1.00 to 1.22). Caucasian patients were also more likely to attain a modified Rankin Scale (mRS) score of 0 to 2 at follow-up (RR: 1.14, 95% CI, 1.10 to 1.19) compared with Asian (RR: 1.00, 95% CI, 0.95 to 1.05) patients. There was no significant difference in the rate of symptomatic intracranial hemorrhage (P=0.20) and any intracranial hemorrhage (P=0.83) between Asian and Caucasian patients.
Conclusion
Tenecteplase was associated with significantly higher rates of complete recanalization in Asian patients compared with Caucasian patients. However, tenecteplase was associated with higher rates of mortality and lower rates of mRS 0 to 2 in Asian patients compared with Caucasian patients. It may be beneficial to study the variations in response to tenecteplase among patients of different ethnic groups in large prospective cohort studies.
6.Safety attitudes, burnout and well-being among healthcare workers during the COVID-19 pandemic: an Indo-Pacific regional cross-sectional study.
Abhiram KANNEGANTI ; Benjamin Yong Qiang TAN ; Nik Hisamuddin NIK AB RAHMAN ; Aloysius Sheng-Ting LEOW ; Max DENNING ; Ee Teng GOH ; Lucas Jun HAO LIM ; Ching-Hui SIA ; Ying Xian CHUA ; James KINROSS ; Melanie TAN ; Li Feng TAN ; Yi Min WAN ; Arvind SHARMA ; Rivan DANUAJI ; R N KOMAL KUMAR ; Chew Keng SHENG ; Cheah Phee KHENG ; Sarah Shaikh ABDUL KARIM ; Mohd Najib ABDUL GHANI ; Suhaimi MAHMUD ; Yiong Huak CHAN ; Vijay Kumar SHARMA ; Kang SIM ; Shirley Beng SUAT OOI
Singapore medical journal 2023;64(11):667-676
INTRODUCTION:
The coronavirus disease 2019 (COVID-19) pandemic has had an unprecedented impact in Asia and has placed significant burden on already stretched healthcare systems. We examined the impact of COVID-19 on the safety attitudes among healthcare workers (HCWs), as well as their associated demographic and occupational factors, and measures of burnout, depression and anxiety.
METHODS:
A cross-sectional survey study utilising snowball sampling was performed involving doctors, nurses and allied health professions from 23 hospitals in Singapore, Malaysia, India and Indonesia between 29 May 2020 and 13 July 2020. This survey collated demographic data and workplace conditions and included three validated questionnaires: the Safety Attitudes Questionnaire (SAQ), Oldenburg Burnout Inventory and Hospital Anxiety and Depression Scale. We performed multivariate mixed-model regression to assess independent associations with the SAQ total percentage agree rate (PAR).
RESULTS:
We obtained 3,163 responses. The SAQ total PARs were found to be 35.7%, 15.0%, 51.0% and 3.3% among the respondents from Singapore, Malaysia, India and Indonesia, respectively. Burnout scores were highest among respondents from Indonesia and lowest among respondents from India (70.9%-85.4% vs. 56.3%-63.6%, respectively). Multivariate analyses revealed that meeting burnout and depression thresholds and shifts lasting ≥12 h were significantly associated with lower SAQ total PAR.
CONCLUSION
Addressing the factors contributing to high burnout and depression and placing strict limits on work hours per shift may contribute significantly towards improving safety culture among HCWs and should remain priorities during the pandemic.
Humans
;
Cross-Sectional Studies
;
Pandemics
;
COVID-19/epidemiology*
;
Burnout, Psychological
;
Health Personnel
7.Surgical margins assessment reduces re-excision rates in breast-conserving surgery.
Chang Yi WOON ; Serene Si Ning GOH ; Lin Seong SOH ; Chloe Fu Cui YEO ; Marc Weijie ONG ; Benjamin WONG ; Joelle Hoi Ting LEONG ; Jerry Tiong Thye GOO ; Clement Luck Khng CHIA
Annals of the Academy of Medicine, Singapore 2023;52(1):48-51
8.Extrapulmonary manifestations and complications of severe acute respiratory syndrome coronavirus-2 infection: a systematic review.
Jiacai CHO ; Joanne LEE ; Ching-Hui SIA ; Chieh Sian KOO ; Benjamin Y Q TAN ; Weizhen HONG ; Ellie CHOI ; Xueying GOH ; Louis CHAI ; Nisha Suyien CHANDRAN ; Horng Ruey CHUA ; Bernard P L CHAN ; Mark MUTHIAH ; Ting Ting LOW ; Eng Soo YAP ; Manjari LAHIRI
Singapore medical journal 2023;64(6):349-365
INTRODUCTION:
We aimed to describe the extrapulmonary manifestations of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection, including their frequency, onset with respect to respiratory symptoms, pathogenesis and association with disease severity.
METHODS:
We searched the MEDLINE and Embase databases for SARS-CoV-2-related studies. Meta-analysis, observational studies, case series and case reports published in English or Chinese between 1 January 2020 and 1 May 2020 were included. Reports with only paediatric or obstetric cases were excluded.
RESULTS:
169 articles were included. Early manifestations (preceding respiratory symptoms until Day 6 of onset) included olfactory and gustatory disturbance (self-reported in up to 68% and 85% of cases, respectively), gastrointestinal symptoms (up to 65.9%) and rash (up to 20.4%). From Day 7 onwards, hypercytokinaemia, paralleled multi-organ complications including acute cardiac injury (pooled incidence of 17.7% in 1,412 patients, mostly with severe disease and 17.4% mortality), kidney and liver injury (up to 17% and 33%, respectively) and thrombocytopenia (up to 30%). Hypercoagulability resulted in venous thromboembolic events in up to 31% of all patients. Uncommon disease presentation and complications comprised Guillain-Barré syndrome, rhabdomyolysis, otitis media, meningoencephalitis and spontaneous pneumomediastinum.
CONCLUSION
Although the systemic manifestations of SARS-CoV-2 infection are variegated, they are deeply interwoven by shared mechanisms. Two phases of extrapulmonary disease were identified: (a) an early phase with possible gastrointestinal, ocular and cutaneous involvement; and (b) a late phase characterised by multiorgan dysfunction and clinical deterioration. A clear, multidisciplinary consensus to define and approach thromboinflammation and cytokine release syndrome in SARS-CoV-2 is needed.
Humans
;
Asian People
;
COVID-19/complications*
;
Inflammation/complications*
;
SARS-CoV-2
;
Thrombosis
9.Global prevalence of depression and anxiety in patients with hepatocellular carcinoma: Systematic review and meta-analysis
Darren Jun Hao TAN ; Sabrina Xin Zi QUEK ; Jie Ning YONG ; Adithya SURESH ; Kaiser Xuan Ming KOH ; Wen Hui LIM ; Jingxuan QUEK ; Ansel TANG ; Caitlyn TAN ; Benjamin NAH ; Eunice TAN ; Taisei KEITOKU ; Mark D. MUTHIAH ; Nicholas SYN ; Cheng Han NG ; Beom Kyung KIM ; Nobuharu TAMAKI ; Cyrus Su Hui HO ; Rohit LOOMBA ; Daniel Q. HUANG
Clinical and Molecular Hepatology 2022;28(4):864-875
Background/Aims:
Depression and anxiety are associated with poorer outcomes in patients with hepatocellular carcinoma (HCC). However, the prevalence of depression and anxiety in HCC are unclear. We aimed to establish the prevalence of depression and anxiety in patients with HCC.
Methods:
MEDLINE and Embase were searched and original articles reporting prevalence of anxiety or depression in patients with HCC were included. A generalized linear mixed model with Clopper-Pearson intervals was used to obtain the pooled prevalence of depression and anxiety in patients with HCC. Risk factors were analyzed via a fractional-logistic regression model.
Results:
Seventeen articles involving 64,247 patients with HCC were included. The pooled prevalence of depression and anxiety in patients with HCC was 24.04% (95% confidence interval [CI], 13.99–38.11%) and 22.20% (95% CI, 10.07–42.09%) respectively. Subgroup analysis determined that the prevalence of depression was lowest in studies where depression was diagnosed via clinician-administered scales (16.07%;95% CI, 4.42–44.20%) and highest in self-reported scales (30.03%; 95% CI, 17.19–47.01%). Depression in patients with HCC was lowest in the Americas (16.44%; 95% CI, 6.37–36.27%) and highest in South-East Asia (66.67%; 95% CI, 56.68–75.35%). Alcohol consumption, cirrhosis, and college education significantly increased risk of depression in patients with HCC.
Conclusions
One in four patients with HCC have depression, while one in five have anxiety. Further studies are required to validate these findings, as seen from the wide CIs in certain subgroup analyses. Screening strategies for depression and anxiety should also be developed for patients with HCC.
10.Academy of Medicine, Singapore clinical guideline on endoscopic surveillance and management of gastric premalignant lesions.
Vikneswaran NAMASIVAYAM ; Calvin J KOH ; Stephen TSAO ; Jonathan LEE ; Khoon Lin LING ; Christopher KHOR ; Tony LIM ; James Weiquan LI ; Aung Myint OO ; Benjamin C H YIP ; Ikram HUSSAIN ; Tju Siang CHUA ; Bin Chet TOH ; Hock Soo ONG ; Lai Mun WANG ; Jimmy B Y SO ; Ming THE ; Khay Guan YEOH ; Tiing Leong ANG
Annals of the Academy of Medicine, Singapore 2022;51(7):417-435
Gastric cancer (GC) has a good prognosis, if detected at an early stage. The intestinal subtype of GC follows a stepwise progression to carcinoma, which is treatable with early detection and intervention using high-quality endoscopy. Premalignant lesions and gastric epithelial polyps are commonly encountered in clinical practice. Surveillance of patients with premalignant gastric lesions may aid in early diagnosis of GC, and thus improve chances of survival. An expert professional workgroup was formed to summarise the current evidence and provide recommendations on the management of patients with gastric premalignant lesions in Singapore. Twenty-five recommendations were made to address screening and surveillance, strategies for detection and management of gastric premalignant lesions, management of gastric epithelial polyps, and pathological reporting of gastric premalignant lesions.
Adenomatous Polyps
;
Endoscopy
;
Humans
;
Precancerous Conditions/therapy*
;
Singapore
;
Stomach Neoplasms/therapy*

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