1.The Role of the Family Doctor in HIV Medicine
The Singapore Family Physician 2013;39(1 (Supplement)):10-16
The outlook of people living with HIV (PLHIV) has changed for the better. With the discovery of effective drugs HIV is more like a chronic disease. The family doctor has several roles in HIV medicine: find, test, treat, and retain. Find - at risk individuals, and reduce their HIV risks. Test – to diagnosis those with acute HIV infection, to identify the asymptomatic patients, and to identify those with AIDS defining illnesses. Treat - participate in shared care management with HIV specialists. Retain – retain wellbeing of PLHIV - monitor for complications, provide patient education to help them minimise complications. Routine testing for HIV infection is now the practice. For treatment, A combination ART regimen consisting of two NRTIs + one active drug from one of the classes: NNRT, PI, INSTI, or a CCRS antagonist. Retaining the wellbeing of PLHIV requires monitoring for complications, and providing patient education to help them minimise complications.
2.Panic attack and its correlation with acute coronary syndrome - more than just a diagnosis of exclusion.
Annals of the Academy of Medicine, Singapore 2010;39(3):197-202
The panic attack is able to mimic the clinical presentation of an acute coronary syndrome (ACS), to the point of being clinically indistinguishable without appropriate investigations. However, the literature actually demonstrates that the 2 conditions are more related than just being differential diagnoses. Through a review of the literature involving epidemiological studies, randomised controlled trials, systematic reviews and meta-analyses found on a Medline search, the relation between panic disorder and ACS is explored in greater depth. Panic disorder, a psychiatric condition with recurrent panic attacks, has been found to be an independent risk factor for subsequent coronary events. This has prognostic bearing and higher mortality rates. Through activation of the sympathetic system by differing upstream mechanisms, the 2 conditions have similar presentations. Another psychiatric differential diagnosis would be that of akathisia, as an adverse effect to antidepressant medications. An overview on the investigations, diagnostic process, treatment modalities and prognoses of the two conditions is presented. Panic disorders remain under-diagnosed, but various interviews are shown to allow physicians without psychiatric training to accurately pick up the condition. Comprehensive multidisciplinary approaches are needed to help patients with both coronary heart disease and anxiety disorder.
Acute Coronary Syndrome
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diagnosis
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physiopathology
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psychology
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Humans
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Panic Disorder
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complications
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diagnosis
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physiopathology
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Risk Factors
3.Progressive Multifocal Leukoencephalopathy with Immune Reconstitution Inflammatory Syndrome (PML-IRIS): two case reports of successful treatment with mefloquine and a review of the literature.
Barnaby E YOUNG ; Tian Rong YEO ; Hui Ting LIM ; Kiat Yee VONG ; Kevin TAN ; David C LYE ; Cheng Chuan LEE
Annals of the Academy of Medicine, Singapore 2012;41(12):620-624
4.Older age at initial presentation to human immunodeficiency virus (HIV) care and treatment at the Communicable Disease Centre (CDC) in Singapore, 2006 to 2011.
Linda K LEE ; Ohnmar Pa Pa SEINN ; Oon Tek NG ; Cheng Chuan LEE ; Yee Sin LEO ; Arlene C CHUA
Annals of the Academy of Medicine, Singapore 2012;41(12):577-580
INTRODUCTIONThe incidence of newly diagnosed older patients diagnosed with human immunodeficiency virus (HIV) has increased worldwide in recent years. In this study, we compared the demographics and clinical presentation of younger and older patients in our HIV sentinel cohort.
MATERIALS AND METHODSAmong all HIV patients presenting to the Communicable Disease Centre (CDC), Singapore from 2006 to 2011, 793 were randomly included in our cohort, representing about 50% of the patients seen during that period. We collected demographic, clinical, laboratory, and outcome data from patient records to compare younger (<50 years old) and older (≥50 years old) HIV patients.
RESULTSOlder patients comprised 27.1% of our HIV cohort and presented with lower median CD4 T cell counts (65 cells/mm³, interquartile range [IQR]: 27 to 214 cells/mm³) compared to younger patients (250 cells/mm³, IQR: 74 to 400 cells/mm³; P <0.001). The median time from HIV diagnosis to initiation of antiretroviral therapy (ART) differed significantly for both age groups as well (49 days for patients <50 years old, IQR: 18 to 294 days; versus 35 days for patients ≥50 years old, IQR: 14 to 102 days; P = 0.008). More of our younger patients were single (72.2%) or homosexual (44.1%), in contrast to older patients, of whom 48.8% were married and 84.7% were heterosexual.
CONCLUSIONUpon comparison of our younger and older patients, we identified distinct differences in risk transmission and clinical presentation. Increased awareness of older patients at risk of HIV may improve time to diagnosis among this age group.
Age Factors ; Anti-Retroviral Agents ; therapeutic use ; CD4 Lymphocyte Count ; statistics & numerical data ; Female ; HIV Seropositivity ; drug therapy ; epidemiology ; physiopathology ; Humans ; Male ; Medical Audit ; Middle Aged ; Retrospective Studies ; Singapore ; epidemiology
6.The role of surgery in high-grade glioma--is surgical resection justified? A review of the current knowledge.
Boon-Chuan PANG ; Wei-Hwang WAN ; Cheng-Kiang LEE ; Kathleen Joy KHU ; Wai-Hoe NG
Annals of the Academy of Medicine, Singapore 2007;36(5):358-363
INTRODUCTIONThe aims of this article were to review the role of surgical resection in the management of high-grade gliomas and to determine whether there is any survival benefit from surgical resection.
METHODSA literature review of the influence of surgical resection on outcome was carried out. Relevant original and review papers were obtained through a PubMed search using the following keywords: glioma, resection, prognosis and outcome.
RESULTSPresently, there is a lack of evidence to support a survival benefit with aggressive glioma resection, but this should not detract patients from undergoing surgery as there are many other clinical benefits of glioma excision. In addition, limiting surgical morbidity through the use of adjuvant techniques such as intraoperative magnetic resonance imaging (MRI), functional MRI and awake craniotomy is becoming increasingly important.
CONCLUSIONSIdeally, a randomised controlled trial would be the best way to resolve the issue of whether (and to what extent) surgical resection leads to improvements in patient outcome and survival, but this would not be ethical. The second best option would be well-controlled retrospective studies with a multivariate analysis of all potential confounding factors.
Glioma ; classification ; surgery ; Humans ; Singapore ; Survival Analysis
7.Healthcare workers and HIV health issues.
Arlene CHUA ; Yee Sin LEO ; Asok KURUP ; Maciej Piotr CHLEBICKI ; Cheng Chuan LEE
Annals of the Academy of Medicine, Singapore 2008;37(7):576-579
Should healthcare workers (HCWs) be routinely tested for HIV? The authors reviewed the literature on the risk and incidence of HIV transmission from HCW to patients and offer recommendations for HIV testing in HCWs in Singapore. Management of HCWs who are tested seropositive for HIV infection is also discussed in this paper.
Acquired Immunodeficiency Syndrome
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epidemiology
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transmission
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HIV Infections
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diagnosis
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epidemiology
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transmission
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Health Personnel
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Humans
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Iatrogenic Disease
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prevention & control
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Infectious Disease Transmission, Professional-to-Patient
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prevention & control
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Occupational Health
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Risk Assessment
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Risk Factors
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Singapore
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epidemiology
8.Imaging Spectrum after Pancreas Transplantation with Enteric Drainage.
Jian Ling CHEN ; Rheun Chuan LEE ; Yi Ming SHYR ; Sing E WANG ; Hsiuo Shan TSENG ; Hsin Kai WANG ; Shan Su HUANG ; Cheng Yen CHANG
Korean Journal of Radiology 2014;15(1):45-53
Since the introduction of pancreas transplantation more than 40 years ago, surgical techniques and immunosuppressive regiments have improved and both have contributed to increase the number and success rate of this procedure. However, graft survival corresponds to early diagnosis of organ-related complications. Thus, knowledge of the transplantation procedure and postoperative image anatomy are basic requirements for radiologists. In this article, we demonstrate the imaging spectrum of pancreas transplantation with enteric exocrine drainage.
Adult
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Anastomosis, Surgical/methods
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Diagnostic Imaging/methods
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Drainage/methods
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Female
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Graft Rejection/pathology
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Graft Survival
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Humans
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Iliac Artery/radiography/surgery
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Immunosuppressive Agents
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Kidney Transplantation
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Male
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*Medical Illustration
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Mesenteric Artery, Superior/radiography/surgery
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Middle Aged
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Pancreas/*blood supply/radiography
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Pancreas Transplantation/adverse effects/*methods
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Pancreatitis, Graft/etiology
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Portal Vein/radiography/surgery
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Postoperative Complications/radiography
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Postoperative Hemorrhage/etiology
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Survival Rate
9.A study on paternity testing with 96 autosomal SNPs.
Li LEE ; Li WANG ; Qing-chuan FENG ; Yun-liang ZHU ; Xiao-li CHENG ; Xiang-dong KONG ; Yan-mei HUANG ; Wen-fei WANG ; Zhao-shu ZENG
Chinese Journal of Medical Genetics 2012;29(1):28-33
OBJECTIVETo explore the feasibility of applying autosomal single nucleotide polymorphisms (SNPs) on parentage testing.
METHODSAll SNP genotyping results of HapMap (r27) were downloaded from the website. With self-made computer programs, SNPs were extracted when their minor allele frequency (MAF) were ≥ 0.30 among all of the 11 HapMap populations. Ninety-six SNPs were chosen and integrated into the Illumina Goldengate bead arrays on the condition that no linkage disequilibrium was found between them. Three father-child-mother trios (9 samples in total) were tested with the arrays. Cumulative paternity index (CPI) was then calculated and compared with genotyping results using 15 short tandem repeats (STRs)(Identifiler(TM)).
RESULTSFamily 1 was found to have nine SNPs or seven STRs that did not conform to the Mendelian laws, Family 2 had 13 such SNPs or seven STRs, and Family 3 only had one such SNP but no STR. For Family 3, when all of the 96 SNPs were used in combine, the CPI was 1207, which had contrasted with the CPI by the 15 STRs, i.e., 355 869.
CONCLUSIONWhen applied to paternity testing, the paternity exclusion (PE) value for a SNP is usually less than 1/3 of that of a STR. The proportion of SNPs not comforming to the Mendelian laws for the tested SNPs may not be as high as that of inconsistent STRs over all tested STRs. Because of the low mutation rate of a SNP, the CPI will be greatly reduced even if one SNP did not conform to the Mendelian laws. Therefore, highly accurate testing methods are required to reduce artificial errors when applying SNPs for paternity testing.
Fathers ; Female ; Genetic Testing ; methods ; Genotype ; HapMap Project ; Humans ; Male ; Mothers ; Paternity ; Polymorphism, Single Nucleotide ; genetics
10.Risk factors and time-trends of cytomegalovirus (CMV), syphilis, toxoplasmosis and viral hepatitis infection and seroprevalence in human immunodeficiency virus (HIV) infected patients.
Raymond Bt LIM ; Mei Ting TAN ; Barnaby YOUNG ; Cheng Chuan LEE ; Yee Sin LEO ; Arlene CHUA ; Oon Tek NG
Annals of the Academy of Medicine, Singapore 2013;42(12):667-673
INTRODUCTIONChronic bacterial, viral and parasitic infections contribute to the morbidity and mortality associated with human immunodeficiency virus (HIV) infection. This study investigated risk factors and time-trends of the seroprevalence of cytomegalovirus (CMV), toxoplasmosis and hepatitis A total antibody; and co-infection with syphilis, hepatitis B and hepatitis C among newly diagnosed HIV individuals in Singapore.
MATERIALS AND METHODSThis was a cross-sectional study. A random sample of 50% of HIV infected patients who visited the Communicable Disease Centre (CDC), Singapore for first-time care from January 2006 to December 2011 were analysed.
RESULTSAmong the 793 study subjects, 93.4% were male; 77.9% of them were of Chinese ethnicity; mean age at HIV diagnosis was 41.4 years; and the mean baseline CD4+ T-cell count was 222 cells/mm³. The prevalence of sero-reactivity for CMV was 96.8%; hepatitis A: 40.9%; and toxoplasmosis: 23.7%. Co-infection with syphilis was identified in 12.3%; hepatitis B: 8.1%; and hepatitis C: 2%. Among those co-infected with hepatitis C, 73.3% of them were intravenous drug user (IVDU). Syphilis co-infection was significantly more common among men who have sex with men (MSM) (multivariate OR: 2.53, 95% CI, 1.31 to 4.90, P = 0.006).
CONCLUSIONThis study described the baseline rates of HIV co-infection with syphilis, hepatitis B and C in Singapore, and sero-reactivity to CMV, toxoplasmosis and hepatitis A. The increased rates compared to the general population may have important consequences for disease progression, response to antiretroviral treatment and long-term general health.
Adult ; Coinfection ; epidemiology ; Cross-Sectional Studies ; Cytomegalovirus ; isolation & purification ; Cytomegalovirus Infections ; blood ; epidemiology ; Female ; HIV Infections ; epidemiology ; Hepacivirus ; isolation & purification ; Hepatitis, Viral, Human ; blood ; epidemiology ; Humans ; Male ; Odds Ratio ; Risk Factors ; Seroepidemiologic Studies ; Singapore ; epidemiology ; Syphilis ; blood ; epidemiology ; Time Factors ; Toxoplasmosis ; blood ; epidemiology