Browse publications by year: 2021

  1. Thomas AG, Stone B, Bennett P, Stewart-Williams S, Kennair LEO
    Arch Sex Behav, 2021 07;50(5):2151-2162.
    PMID: 34231108 DOI: 10.1007/s10508-021-01991-0
    Sociosexuality and sexual compulsivity predict sex differences in voyeuristic interest in the population. In this study, we used a sample of 1113 participants from the UK (46% men) to consider whether sociosexuality and sexual compulsivity interacted to explain these sex differences and whether this relationship extended to the related domain of exhibitionism. In doing so, we tested novel predictions derived from an evolutionary perspective which views voyeuristic and exhibitionistic interest as manifestations of a short-term mating strategy. Participants reported their levels of repulsion toward voyeurism and exhibitionism and their interest in performing such acts under different levels of risk. There were clear sex differences in voyeuristic and exhibitionistic repulsion that were partially mediated by the serial combination of sociosexuality and sexual compulsivity. Examining the sexes separately revealed qualitatively different relationships between sociosexuality and sexual compulsivity when predicting exhibitionistic, but not voyeuristic, repulsion. Combined, sociosexuality and sexual compulsivity also mediated the sex difference in willingness to commit acts of voyeurism, but not exhibitionism, which was equally low for both sexes. The results highlight the role sociosexuality plays in voyeuristic and exhibitionistic interest, which coupled with an evolutionary perspective, may have implications for how we view courtship disorders.
  2. Abu Bakar S, Jusoh N, Mohamed A, Muqoyyanah M, Othman MHD, Mamat MH, et al.
    Environ Sci Pollut Res Int, 2021 Dec;28(46):65171-65187.
    PMID: 34231144 DOI: 10.1007/s11356-021-14918-y
    In this work, waste cooking palm oil (WCPO)-based carbon nanotubes (CNTs) with encapsulated iron (Fe) nanoparticles have been successfully produced via modified thermal chemical vapor deposition method. Based on several characterizations, the dense WCPO-based CNT was produced with high purity of 89% and high crystallinity proven by low ID/IG ratio (0.43). Moreover, the ferromagnetic response of CNTs showed that the average coercivity and magnetization saturation were found to be 551.5 Oe and 13.4 emu/g, respectively. These produced WCPO-based CNTs were further used as heavy metal ions adsorbent for wastewater treatment application. Some optimizations, such as the effect of different adsorbent dosage, varied initial pH solution, and various heavy metal ions, were investigated. The adsorption studies showed that the optimum adsorbent dosage was 1.8 g/L when it was applied to 100 mg/L Cu (II) solution at neutral pH (pH 7). Further measurement then showed that high Cu (II) ion removal percentage (~80%) was achieved when it was applied at very acidic solution (pH 2). Last measurement confirmed that the produced WCPO-based CNTs successfully removed different heavy metal ions in the following order: Fe (II) > Zn (II) ≈ Cu (II) with the removal percentage in the range of 99.2 to 99.9%. The adsorption isotherm for Cu (II) was better fitted by Langmuir model with a correlation coefficient of 0.82751. WCPO-based CNTs can be a potential material to be applied as adsorbent in heavy metal ion removal.
  3. Yap KH, Kessels RPC, Azmin S, van de Warrenburg B, Mohamed Ibrahim N
    Cerebellum, 2021 Jul 07.
    PMID: 34231180 DOI: 10.1007/s12311-021-01282-3
    Spinocerebellar ataxia type 3 (SCA3), the commonest dominantly inherited ataxia worldwide, is characterized by disruption in the cerebellar-cerebral and striatal-cortical networks. Findings on SCA3-associated cognitive impairments are mixed. The classification models, tests and scoring systems used, language, culture, ataxia severity, and depressive symptoms are all potential confounders in neuropsychological assessments and may have contributed to the heterogeneity of the neurocognitive profile of SCA3. We conducted a systematic review of studies evaluating neurocognitive function in SCA3 patients. Of 1304 articles identified, 15 articles met the eligibility criteria. All articles were of excellent quality according to the National Institutes of Health quality assessment tool for case-control studies. In line with the disrupted cerebellar-cerebral and striatal-cortical networks in SCA3, this systematic review found that the neurocognitive profile of SCA3 is characterized by a core impairment of executive function that affects processes such as nonverbal reasoning, executive aspects of language, and recall. Conversely, neurocognitive domains such as general intelligence, verbal reasoning, semantic aspect of language, attention/processing speed, recognition, and visuospatial perception and construction are relatively preserved. This review highlights the importance of evaluating neurocognitive function in SCA3 patients. Considering the negative impact of cognitive and affective impairment on quality of life, this review points to the profound impairments that existing or future treatments should prioritize.
  4. Iwar RT, Ogedengbe K, Katibi KK, Jabbo JN
    Environ Monit Assess, 2021 Jul 07;193(8):477.
    PMID: 34232399 DOI: 10.1007/s10661-021-09230-8
    Fluoride enrichment of groundwater has been adjudged to be a global environmental challenge in the past decade as most humans depend on groundwater for their domestic needs. This study was conducted to investigate the ionic and fluoride concentrations in borehole water and its associated health risk potentials to residents of Makurdi town and its environs, Benue state, Nigeria. Multivariate statistical techniques were for the first time used to explain the mechanisms of fluoride occurrence in groundwater in the study area. An aggregate of sixty-three (63) groundwater samples were retrieved from boreholes in twenty-one (21) diverse points within the study area and assessed for its physico-chemical composition with emphasis on fluoride content and health risk potentials following standard field and laboratory procedures. It was observed that fluoride content in the sampled water exceeded the stipulated safe limit of 1.5 mg/L in about 33.33% of the total samples and ranged from 0.34 to 2.06 mg/L with an average of 1.26 ± 0.41 mg/L. Moderate affirmative relationships were observed to exist between F- and TDS, F- and EC, F- and Cl-, and F- and NO3- in the water samples indicative of a common source pollution. Principal component analysis (PCA) revealed that high fluoride content in the water samples was associated with the dissolutions from quartzite and shale into the underlying deep aquifers as well as from contributions from anthropogenic activities including fertilizer and pesticide uses. Fluoride risk assessment indicated that the hazard quotient (HQ) for ingestion of fluoride laden water exceeded the threshold value in 66.7, 71.4, 52.4, and 9.5% of the samples for infants, children, teenagers, and adults respectively. It was found that multivariate statistical procedures such as PCA and correlation analysis (CA) are capable of establishing the relationship among groundwater pollutants, while hierarchical cluster analysis (HCA) was found suitable for explaining the likely sources/processes of pollutant enrichment in the groundwater. It is recommended that the findings of this study would serve as a basis for policy makers and regulatory bodies towards ameliorating the menace of groundwater contamination within the study area.
  5. Kitisubkanchana J, Reduwan NH, Poomsawat S, Pornprasertsuk-Damrongsri S, Wongchuensoontorn C
    Oral Radiol, 2021 Oct;37(4):715-717.
    PMID: 34232436 DOI: 10.1007/s11282-021-00551-5
  6. Singh Y, Fuloria NK, Fuloria S, Subramaniyan V, Meenakshi DU, Chakravarthi S, et al.
    J Med Virol, 2021 Oct;93(10):5726-5728.
    PMID: 34232521 DOI: 10.1002/jmv.27181
    MeSH terms: Humans; Immunity, Cellular; Mutation; T-Lymphocytes/immunology; Antibodies, Neutralizing/immunology; Antibodies, Neutralizing/therapeutic use*; Spike Glycoprotein, Coronavirus/genetics*; Spike Glycoprotein, Coronavirus/immunology; Protein Domains
  7. Jeremy Wong HS, Huong KH, Shafie NAH, Amirul AA
    J Biotechnol, 2021 Aug 20;337:71-79.
    PMID: 34233208 DOI: 10.1016/j.jbiotec.2021.07.001
    The sustainability in polyhydroxyalkanoates (PHA) production is drawing increasing attention as the effort to increase the economic feasibility for commercialization pursues. Oleic acid is widely preferred by bacteria but its employment for PHA production makes sustainability rather dubious. This study showed promising poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(3HB-co-3HV)] content of 68 wt % by lipase genes-harbouring Cupriavidus malaysiensis USMAA2-4 transformant from palm olein and 1-pentanol. High oleic acid content and low oil saturation caused palm olein to outperform crude palm oil, crude palm kernel oil and soybean oil due to its preference for oleic acid shown by previous screening. The transformant showed 8-fold and 40-fold higher lipase activity compared to C. necator H16 and its wild-type respectively. The transformant was unaffected by Co2+ but the growth of C. necator H16 was inversely proportional to Co2+ concentration and the employment of 1-pentanol also ceased its growth and PHA accumulation. Although the inhibitory effect of Fe2+, Cu2+ and Zn2+ at high molarity on LipA decreased PHA content of C. malaysiensis USMAA2-4 transformant by 23-24 wt %, the lipase activity was restorable with high molarity of Ca2+, thus resulted in higher PHA content. The transformant enabled the employment of low-cost 1-pentanol as the precursor for cost-effective PHA production and its preference for palm olein contributed to higher sustainability.
    MeSH terms: Pentanols; Hydroxybutyrates; Cupriavidus*; Polyhydroxyalkanoates*
  8. Nair T, Choo CSC, Abdullah NS, Lee S, Teo LLE, Chen Y, et al.
    Eur J Anaesthesiol, 2021 Aug 01;38(8):880-887.
    PMID: 33186309 DOI: 10.1097/EJA.0000000000001385
    BACKGROUND: Hospital admissions and surgical operations commonly trigger anxiety in young children. Despite employing numerous support measures in our hospital, such as a pre-operative play room, the encouragement of parental companionship during induction of anaesthesia and distraction therapy, allaying the anxiety of our young surgical patients remains a challenge.

    OBJECTIVES: To evaluate the effectiveness of a Home-Initiated-Programme-to-Prepare-for-Operation (HIPPO) on emotional manifestation and anxiety in children undergoing surgery.

    DESIGN, SETTING AND PATIENTS: One hundred and thirty children were randomly assigned to either control or intervention group between February 2018 and April 2019 in a tertiary paediatric hospital in Singapore.

    INTERVENTION: In addition to our standard pre-operative workflow, the intervention group received an additional home preparation kit consisting of an animated video on preoperative preparation and age-specific preoperative preparation activity sheets.

    MAIN OUTCOME MEASURES: The primary outcome was the Children's Emotional Manifestation Scale score to evaluate behaviour and emotion in the children before and during induction of anaesthesia. Secondary outcomes evaluated anxiety levels in parents and children, the child's behaviour and degree of co-operation using the State-Trait Anxiety Inventory scores, State-Trait Anxiety Inventory Children scores, the Induction Compliance Checklist scores, the Visual Analogue Scale scores for anxiety and the feedback questionnaire.

    RESULTS: The difference between the Children's Emotional Manifestation Scale score in control and intervention groups was not statistically significant. A promising difference was however observed in one of the secondary outcomes where the state-State-Trait Anxiety Inventory Children scores of 7 to 10-year olds in the intervention group almost reached significance; P = 0.067.

    CONCLUSION: Despite being a child-friendly, easily accessible and affordable tool for patient education, HIPPO did not reduce anxiety experienced by children in the pre-operative waiting area or during induction of anaesthesia.

    TRIAL REGISTRATION: ClinicalTrials.gov, identifier: NCT04271553.

    MeSH terms: Anesthesia*; Child; Child, Preschool; Humans; Parents; Preoperative Care
  9. Wan KS, Moy FM, Mustapha FI, Ismail M, Hairi NN
    J Diabetes, 2021 Nov;13(11):915-929.
    PMID: 34142456 DOI: 10.1111/1753-0407.13206
    BACKGROUND: This study aimed to describe changes in body mass index, glycosylated hemoglobin A1C, blood pressure, and low-density lipoprotein (LDL)-cholesterol among type 2 diabetes patients in Malaysia.

    METHODS: A five-year retrospective cohort study was conducted using data from the National Diabetes Registry. Type 2 diabetes patients aged ≥18 years and had ≥2 clinical audits between 2013 and 2017 were included in the analysis. The first audit information formed the baseline characteristics, and the last audit information was used for comparison. Individualized A1C, blood pressure, and LDL-cholesterol goals were adapted from Malaysian Clinical Practice Guidelines on Type 2 Diabetes Management 2020, American Diabetes Association 2020, and European Association for the Study of Diabetes 2019.

    RESULTS: Of the 18 341 patients, 55.8% were female and 64.9% Malay ethnicity. The baseline mean age was 59.3 ± 10.6 years. During an average of 2.5 person-years of follow-up, the mean body mass index dropped by 0.16 kg/m2 to 27.9 kg/m2 , A1C increased by 0.16% to 8.0%, systolic blood pressure increased by 1.4 mm Hg to 136.2 mm Hg, diastolic blood pressure decreased by 1.0 mm Hg to 77.3 mm Hg and LDL-cholesterol reduced by 0.12 mmol/L to 2.79 mmol/L, P 

  10. Ahmad MF, Das S, Goldstein JA, Shanes ED, Mithal LB, Miller ES
    Am J Clin Pathol, 2021 07 06;156(2):329-330.
    PMID: 34145875 DOI: 10.1093/ajcp/aqab079
  11. Ruiz-Sorribas A, Poilvache H, Kamarudin NHN, Braem A, Van Bambeke F
    Biofouling, 2021 05;37(5):481-493.
    PMID: 34225500 DOI: 10.1080/08927014.2021.1919301
    Biofilms are an important medical burden, notably for patients with orthopaedic device-related infections. When polymicrobial, these infections are more lethal and recalcitrant. Inter-kingdom biofilm infections are poorly understood and challenging to treat. Here, an in vitro three-species model including Staphylococcus aureus, Escherichia coli and Candida albicans was developed, to represent part of the diversity observed in orthopaedic infections or other clinical contexts. The importance of fungal hyphae for biofilm formation and virulence factor expression was explored. Two protocols were set up, allowing, or not, for hyphal formation. Culturable cells and biomass were characterised in both models, and biofilms were imaged in bright-field, confocal and electron microscopes. The expression of genes related to virulence, adhesion, exopolysaccharide synthesis and stress response was analysed in early-stage and mature biofilms. It was found that biofilms enriched in hyphae had larger biomass and showed higher expression levels of genes related to bacterial virulence or exopolysaccharides synthesis.
    MeSH terms: Candida albicans; Humans; Staphylococcus aureus; Bacterial Physiological Phenomena; Biofilms*; Hyphae*
  12. Pang YK, Ismail AI, Chan YF, Cheong A, Chong YM, Doshi P, et al.
    BMC Infect Dis, 2021 Jul 05;21(1):644.
    PMID: 34225647 DOI: 10.1186/s12879-021-06360-9
    BACKGROUND: Available data on influenza burden across Southeast Asia are largely limited to pediatric populations, with inconsistent findings.

    METHODS: We conducted a multicenter, hospital-based active surveillance study of adults in Malaysia with community-acquired pneumonia (CAP), acute exacerbation of chronic obstructive pulmonary disease (AECOPD) and acute exacerbation of asthma (AEBA), who had influenza-like illness ≤10 days before hospitalization. We estimated the rate of laboratory-confirmed influenza and associated complications over 13 months (July 2018-August 2019) and described the distribution of causative influenza strains. We evaluated predictors of laboratory-confirmed influenza and severe clinical outcomes using multivariate analysis.

    RESULTS: Of 1106 included patients, 114 (10.3%) were influenza-positive; most were influenza A (85.1%), with A/H1N1pdm09 being the predominant circulating strain during the study following a shift from A/H3N2 from January-February 2019 onwards. In multivariate analyses, an absence of comorbidities (none versus any comorbidity [OR (95%CI), 0.565 (0.329-0.970)], p = 0.038) and of dyspnea (0.544 (0.341-0.868)], p = 0.011) were associated with increased risk of influenza positivity. Overall, 184/1106 (16.6%) patients were admitted to intensive care or high-dependency units (ICU/HDU) (13.2% were influenza positive) and 26/1106 (2.4%) died (2.6% were influenza positive). Males were more likely to have a severe outcome (ICU/HDU admission or death).

    CONCLUSIONS: Influenza was a significant contributor to hospitalizations associated with CAP, AECOPD and AEBA. However, it was not associated with ICU/HDU admission in this population. Study registration, NMRR ID: NMRR-17-889-35,174.

    MeSH terms: Adult; Aged; Asthma/complications*; Child, Preschool; Hospitalization; Humans; Influenza, Human/complications*; Intensive Care Units; Male; Middle Aged; Pneumonia/complications*; Community-Acquired Infections/complications*; Pulmonary Disease, Chronic Obstructive/complications*; Influenza A Virus, H3N2 Subtype*
  13. Asghar A, Tan YC, Zahoor M, Zainal Abidin SA, Yow YY, Khan E, et al.
    Sci Rep, 2021 Jul 05;11(1):13859.
    PMID: 34226594 DOI: 10.1038/s41598-021-92622-0
    The emergence and spread of antimicrobial resistance have been of serious concern to human health and the management of bacterial infectious diseases. Effective treatment of these diseases requires the development of novel therapeutics, preferably free of side effects. In this regard, natural products are frequently conceived to be potential alternative sources for novel antibacterial compounds. Herein, we have evaluated the antibacterial activity of the epicarp extracts of the Malaysian cultivar of yellow rambutan fruit (Nephelium lappaceum L.) against six pathogens namely, Bacillus subtilis, methicillin-resistant Staphylococcus aureus (MRSA), Streptococcus pyogenes, Pseudomonas aeruginosa, Klebsiella pneumoniae and Salmonella enterica. Among a series of solvent extracts, fractions of ethyl acetate and acetone have revealed significant activity towards all tested strains. Chemical profiling of these fractions, via HPLC, LC-MS and GC-MS, has generated a library of potentially bioactive compounds. Downstream virtual screening, pharmacological prediction, and receptor-ligand molecular dynamics simulation have eventually unveiled novel potential antibacterial compounds, which can be extracted for medicinal use. We report compounds like catechin, eplerenone and oritin-4-beta-ol to be computationally inhibiting the ATP-binding domain of the chaperone, DnaK of P. aeruginosa and MRSA. Thus, our work follows the objective to propose new antimicrobials capable of perforating the barrier of resistance posed by both the gram positives and the negatives.
    MeSH terms: Anti-Infective Agents/pharmacology; Anti-Infective Agents/chemistry; Bacillus subtilis/drug effects; Bacillus subtilis/pathogenicity; Bacterial Infections/drug therapy*; Bacterial Infections/microbiology; Bacterial Infections/pathology; Biological Products/pharmacology*; Biological Products/chemistry; Fruit/chemistry; Humans; Klebsiella pneumoniae/drug effects; Klebsiella pneumoniae/pathogenicity; Microbial Sensitivity Tests; Plant Extracts/pharmacology*; Plant Extracts/chemistry; Pseudomonas aeruginosa/drug effects; Pseudomonas aeruginosa/pathogenicity; Salmonella enterica/drug effects; Salmonella enterica/pathogenicity; Drug Resistance, Bacterial/drug effects; Sapindaceae/chemistry*; Methicillin-Resistant Staphylococcus aureus/drug effects; Methicillin-Resistant Staphylococcus aureus/pathogenicity
  14. Ramalingam A, Budin SB, Mohd Fauzi N, Ritchie RH, Zainalabidin S
    Sci Rep, 2021 07 05;11(1):13845.
    PMID: 34226619 DOI: 10.1038/s41598-021-93234-4
    Long-term nicotine intake is associated with an increased risk of myocardial damage and dysfunction. However, it remains unclear whether targeting mitochondrial reactive oxygen species (ROS) prevents nicotine-induced cardiac remodeling and dysfunction. This study investigated the effects of mitoTEMPO (a mitochondria-targeted antioxidant), and resveratrol (a sirtuin activator) , on nicotine-induced cardiac remodeling and dysfunction. Sprague-Dawley rats were administered 0.6 mg/kg nicotine daily with 0.7 mg/kg mitoTEMPO, 8 mg/kg resveratrol, or vehicle alone for 28 days. At the end of the study, rat hearts were collected to analyze the cardiac structure, mitochondrial ROS level, oxidative stress, and inflammation markers. A subset of rat hearts was perfused ex vivo to determine the cardiac function and myocardial susceptibility to ischemia-reperfusion injury. Nicotine administration significantly augmented mitochondrial ROS level, cardiomyocyte hypertrophy, fibrosis, and inflammation in rat hearts. Nicotine administration also induced left ventricular dysfunction, which was worsened by ischemia-reperfusion in isolated rat hearts. MitoTEMPO and resveratrol both significantly attenuated the adverse cardiac remodeling induced by nicotine, as well as the aggravation of postischemic ventricular dysfunction. Findings from this study show that targeting mitochondrial ROS with mitoTEMPO or resveratrol partially attenuates nicotine-induced cardiac remodeling and dysfunction.
    MeSH terms: Animals; Antioxidants/pharmacology*; Disease Models, Animal; Humans; Mitochondria, Heart/drug effects; Mitochondria, Heart/metabolism*; Nicotine/toxicity; Myocardial Reperfusion Injury/chemically induced; Myocardial Reperfusion Injury/metabolism; Myocardial Reperfusion Injury/prevention & control; Reactive Oxygen Species/metabolism*; Oxidative Stress/drug effects*; Ventricular Dysfunction, Left/chemically induced; Ventricular Dysfunction, Left/metabolism*; Ventricular Dysfunction, Left/pathology; Ventricular Dysfunction, Left/prevention & control; Ventricular Remodeling/drug effects; Myocytes, Cardiac/drug effects; Myocytes, Cardiac/metabolism; Rats; Atrial Remodeling/drug effects
  15. Shiva S, Mari S, Amuthan A, Shanmugam R
    J Ayurveda Integr Med, 2021 Jun 30.
    PMID: 34226805 DOI: 10.1016/j.jaim.2021.06.009
    Background: Vajra kandi maathirai (VKM) is a mercury based traditional Siddha drug used to treat various types of fevers and inflammatory diseases. We report our experience of using VKM successfully to treat 5 severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infected patients and its chemical profile.

    Case report: A family with 5 members age ranges between 13 to 77, both male and females, one with preexisting renal impairment, SARS CoV-2 positive with mild to moderate category were treated with VKM along with the specific dietary practice. The drug was consumed at home quarantine. Real-Time RT PCR from oropharynx swab, X-ray/CT scan chest, hematology, renal function, liver function, body temperature and oxygen saturation were assessed. Blood parameters were repeated after completion of therapy to assess the safety aspect of mercury drug. Chemical profile of the drug was done using Gas chromatography-mass spectrometry and inductively coupled plasma mass spectrometry.

    Results: With the first dose, the oxygen saturation was improved. Within 3 days of therapy, all symptoms (fever, body pain, cough, and loss of taste) were normalized and renders the Real-Time RT PCR negative for COVID-19. There was no observed side effects and damage to renal and liver. The drug contains 22% of mercury along with a 9-Octadecenoic acid-(E), 1H-Imidazole, 4,5-dihydro-2-(phenylmethyl) and 9,12-Octadecadienoic acid (Z,Z)- as major organic compounds.

    Conclusion: Vajra kandi maathirai might be a safe drug to manage COVID-19 patients. Rigorous research is required to discover new antiviral molecules from this formulation.

  16. Allaham S, Demel IC, Nur I, Abu Salim FN, Manikam L
    PMID: 34226852 DOI: 10.1002/wmh3.412
    In March 2020, the outbreak of COVID-19 was officially declared a global pandemic by the World Health Organization. Given the novelty of the virus, and hence, lack of official guidance on effective containment strategies, individual countries opted for different containment approaches ranging from herd immunity to strict lockdown. The opposing strategies followed by the United Kingdom and its former colony, Malaysia, stand exemplary for this. Real-time polymerase chain reaction was implemented for testing in both counties. Malaysia acted with strict quarantining rules and infection surveillance. The United Kingdom followed an initially lenient, herd-immunity approach with strict lockdown only enforced weeks later. Although based on the same health-care structure historically, Malaysia developed a more unified health system compared with the United Kingdom. We suggest that this more centralized structure could be one possible explanation for why Malaysia was able to react in a more timely and efficient manner, despite its closer geographic proximity to China. We further explore how the differences in testing and quarantining strategy, as well as political situation and societal compliance could account for the discrepancy in the United Kingdom's versus Malaysia's relative success of COVID-19 containment.
  17. Kamalden TMIT, Misron K
    PMID: 34226993 DOI: 10.1007/s00405-021-06980-6
    OBJECTIVES: This study aims to assess the clinical trends of malignant otitis externa (MOE) and classify MOE based on the findings related to high-resolution computed tomography (HRCT) of the temporal bone and 99-Tech3-Phase Bone Scintigraphy (TPBS). We also reconstruct a treatment algorithm for MOE in our institution.

    METHODOLOGY: A 10-year retrospective review was carried out on MOE in a single otology institution from January 2011 to December 2020. The MOE was classified based on proposed Tengku's radiological stratification according to HRCT and TBPS findings. Phase I is defined as inflammation limited to the soft tissue in the external auditory canal, without involvement of the bone. Phase II is the inflammation beyond the soft tissue, involving bone, but limited to the mastoid. Phase III is when the inflammation extends medially, involving the petrous temporal bone or temporomandibular joint, with or without parapharyngeal soft tissue involvement. Phase IV refers to inflammation extending medially to involve the nasopharynx, with or without abscess formation. Finally, Phase V is inflammation that further extends to the contralateral base of the skull.

    RESULTS: A sample of 49 patients was involved in this study. Majority of the patients were having Phase III (36.7%) of the disease, followed by Phase V (24.5%), Phase II (18.4%), Phase IV (16.3%), and Phase I (4.1%). A comprehensive treatment algorithm was drafted based on our institution's experience in managing MOE. The mortality rate was low (8.2%), mainly involving patients in advanced phase of the disease (Phases IV and V).

    CONCLUSION: This study has revealed the evidence of progression of MOE based on the proposed radiological stratification. This stratification is simple and practically applicable in clinical settings. We suggest the use of our proposed treatment algorithm as a standard diagnostic and treatment protocol for MOE.

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