Displaying all 15 publications

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  1. Ng ZQ, Tan JH, Tan H
    Malays Fam Physician, 2019;14(2):32-35.
    PMID: 31827734
    Caecal volvulus has been reported to be associated with various abdominal and pelvic pathologies. Its signs and symptoms are usually non-specific and maybe overlooked in favour of benign causes, such as constipation. A high degree of suspicion is required for prompt diagnosis. Herein, we report on an unusual case of caecal volvulus after a dental procedure that was managed initially as constipation.
  2. Ng ZQ, Tan HCL, Tan JH
    J Gastrointest Surg, 2023 Apr;27(4):836-837.
    PMID: 36658386 DOI: 10.1007/s11605-023-05597-w
  3. Ng ZQ, Tan JH, Tan HCL, Theophilus M
    World J Gastrointest Endosc, 2021 Mar 16;13(3):82-89.
    PMID: 33763188 DOI: 10.4253/wjge.v13.i3.82
    BACKGROUND: Post-colonoscopy diverticulitis is increasingly recognized as a potential complication. However, the evidence is sparse in the literature.

    AIM: To systematically review all available evidence to describe the incidence, clinical course with management and propose a definition.

    METHODS: The databases PubMed, EMBASE and Cochrane databases were searched using with the keywords up to June 2020. Additional manual search was performed and cross-checked for additional references. Data collected included demographics, reason for colonoscopy, time to diagnosis, method of diagnosis (clinical vs imaging) and management outcomes.

    RESULTS: A total of nine studies were included in the final systematic review with a total of 339 cases. The time to diagnosis post-colonoscopy ranged from 2 h to 30 d. Clinical presentation for these patients were non-specific including abdominal pain, nausea/vomiting, per rectal bleeding and chills/fever. Majority of the cases were diagnosed based on computed tomography scan. The management for these patients were similar to the usual patients presenting with diverticulitis where most resolve with non-operative intervention (i.e., antibiotics and bowel rest).

    CONCLUSION: The entity of post-colonoscopy diverticulitis remains contentious where there is a wide duration post-procedure included. Regardless of whether this is a true complication post-colonoscopy or a de novo event, early diagnosis is vital to guide appropriate treatment. Further prospective studies especially registries should include this as a complication to try to capture the true incidence.

  4. Tan HCL, Tan JH, Nur Dzainuddin NA, Chan KK
    Ann Coloproctol, 2020 Apr;36(2):94-101.
    PMID: 32178501 DOI: 10.3393/ac.2019.05.10
    PURPOSE: The purpose of this study was to demonstrate the feasibility and safety of laparoscopic-assisted anterior resection (LAAR) for colorectal cancer in a local Asian population.

    METHODS: This is a retrospective review of all patients with colorectal cancer operated from November 2017 to October 2018. Main variables of interest were demography, type and surgery, length of stay (LOS), and the involvement of proximal and distal doughnut. Postoperative complications were analysed using chi-square or Fisher exact and Mann-Whitney tests.

    RESULTS: There were 23 patients with a mean age of 62.5 ± 12.2 years. The mean time from diagnosis to surgery was 97.1 ± 154.84 days. There were 12 patients in the LAAR group and 11 in the open anterior resection (OAR) group. Duration of surgery was shorter in OAR (129.58 ± 51.38 minutes) compared to LAAR (147.91 ± 39.37 minutes). Mean LOS was shorter in the LAAR group with 5±1.5 days compared to the OAR group of 7.42 ± 4.25 days. However, there was no significant P-value for both duration of surgery (P = 0.322) or LOS (P = 0.87). A total of 3 complications were recorded after OAR and 2 after LAAR. Both groups had clear proximal and distal margins with 16 (12-18.5) harvested lymph nodes in LAAR and 18 (16-22) in OAR, which were equal (P = 0.155).

    CONCLUSION: This study reports a shorter LOS in the minimally invasive group of 2 days with similar oncologic resection outcomes. This shows that LAAR is feasible in Malaysia and has potential outcome benefits.

  5. Pang WS, Tan JH, Tan HCL, Tan JKG
    Malays Fam Physician, 2021 Jul 22;16(2):78-82.
    PMID: 34386169 DOI: 10.51866/cr1087
    Retained rectal foreign body, with its associated social stigma, is a medical condition that is infrequently reported in Malaysia. We report the surgical management of five cases of retained foreign objects in the rectum seen over a one-year period. There were three young and two elderly male patients. One of the elderly patients presented with altered bowel habits and an abdominal mass that mimicked a symptomatic colonic tumor. All patients had an abdominal radiograph which clinched the diagnosis of a retained foreign rectal body. Successfully retrieved objects included two bottles, one bidet device, and two sex toys. Open surgery for retrieval of the impacted rectal foreign body was required in one patient. All underwent successful retrievals without any adverse postoperative complications. In our case series, retained rectal foreign bodies were observed only in the male gender. The age presentation was bimodal, with age groups in the twenties and sixties. The treatment options used for the retrieval of these impacted foreign bodies included transanal extraction or explorative laparotomy. Proximal migration and delayed presentation are possible indications for the latter approach.
  6. Tan JH, Ng ZQ, Tan HCL, Vendargon S
    BMJ Case Rep, 2018 Jun 27;2018.
    PMID: 29950501 DOI: 10.1136/bcr-2018-224741
    A 72-year-old Chinese man presented with mild symptoms of heart failure. Transthoracic echocardiography showed signs of cardiac tamponade though clinically he was relatively well. The option of pericardiocentesis was not carried out due to a narrow window for aspiration with only a thin layer of effusion seen surrounding the apex and right ventricle on subcostal view.Pericardial window was done via a left anterolateral thoracotomy. Intraoperatively, 500 cm3 of purulent fluid was drained. Microbiology screens were all negative. We present the atypical clinical course of this elderly man presenting with a large pyopericardium.
  7. Tan JH, Sivadurai G, Tan HCL, Tan YR, Jahit S, Hans Alexander M
    Surg Laparosc Endosc Percutan Tech, 2020 Apr;30(2):106-110.
    PMID: 31923160 DOI: 10.1097/SLE.0000000000000754
    BACKGROUND: Provision of enteral nutrition with jejunal feeding in upper gastrointestinal obstruction is highly recommended. Access to jejunum can be obtained surgically, percutaneously, or endoscopically. Our institution routinely and preferentially utilizes a silicone nasojejunal tube that is inserted past the obstruction endoscopically. We use a custom dual channel tube that allows feeding at the distal tip and another channel 40 cm from the tip that enables decompression proximally. This is a report of our experience with this custom nasojejunal tube.

    METHODS: This is a prospective observational study of 201 patients who underwent endoscopic nasojejunal wire-guided feeding tube insertions for obstruction of either the esophagus or the stomach including both benign and malignant pathologies between January 2015 to June 2018 in Hospital Sungai Buloh and Hospital Sultanah Aminah, Malaysia. The indications for tube insertion, insertion technique, and tube-related problems were described.

    RESULTS: The nasojejunal tube was used to establish enteral feeding in patients with obstructing tumors of the distal esophagus in 65 patients (32.3%) and gastric outlet obstruction in 72 patients (35.8%). There were 54 patients (26.9%) who required reinsertion. The most common reason for reinsertion was unintentional dislodgement, where 32 patients (15.9%) followed by tube blockage 20 patients (10.0%). Using our method of advancement under direct vision, we had only 2 cases of malposition due to severely deformed anatomy. We had no incidence of aspiration in this group of patients and overall, the patients tolerated the tube well.

    CONCLUSIONS: The novel nasojejunal feeding tube with gastric decompression function is a safe and effective method of delivery of enteral nutrition in patients with upper gastrointestinal obstruction. These tubes if inserted properly are well tolerated with almost no risk of malposition and are tolerated well even for prolonged periods of time until definitive surgery could be performed.

  8. Tan HCL, Tan JH, Vellusamy VM, Vasavan Y, Lim CS
    Malays J Pathol, 2020 Aug;42(2):267-271.
    PMID: 32860380
    INTRODUCTION: Majority of Wilms tumour (WT) responds well to pre-operative chemotherapy. In Malaysia, incidence of WT is rare with only two cases reported per one million populations yearly. This case report is to highlight on the awareness of WT in an Asian population and highlight two cases and challenges faced after pre-operative chemotherapy.

    CASE REPORT: In this case series, we report on two cases of WT which had poor response to pre-operative chemotherapy. Both cases underwent surgery after pre-operative chemotherapy and recovery was uneventful during a two-year follow-up.

    DISCUSSION: Both patients had chemotherapy prior planned surgery, but had unfortunate poor tumour response. The tumour progressed in size which required a radical nephrectomy. The histology report for the first case had more than 60% blastemal cells remaining despite giving pre-operative chemotherapy with no focal anaplasia. This showed poor response to chemotherapy evidenced by the high number of blastemal cells. The second case was a stromal type WT which is known for poor response and may lead to enhancement of growth and maturation induced by chemotherapy. These were the possible reason of poor response of WT in these two cases.

  9. Lim RZM, Ooi JY, Tan JH, Tan HCL, Sikin SM
    Int J Surg Oncol, 2019;2019:6109643.
    PMID: 30941211 DOI: 10.1155/2019/6109643
    Introduction: Therapeutic nodal dissection is still the mainstay of treatment for patients with lymph node metastases in many centres. The local data, however, on the outcome of therapeutic LND remains limited. Hence, this study aims to inform practice by presenting the outcomes of LND for thyroid cancer patients and our experience in a tertiary referral centre.

    Methods: This is a single-centre retrospective observational study in a Malaysian tertiary endocrine surgery referral centre. Patients who underwent total thyroidectomy with lymph node dissection between years 2013 and 2015 were included and electronic medical records over a 3-year follow-up period were reviewed. The outcomes of different lymph node dissection (LND), including central neck dissection, lateral neck dissection, or both, were compared.

    Results: Of the 43 subjects included, 28 (65.1%) had Stage IV cancer. Among the 43 subjects included, 8 underwent central LND, and 15 had lateral LND while the remaining 20 had dissection of both lateral and central lymph nodes. Locoregional recurrence was found in 16 (37.2%) of our subjects included, with no statistical difference between the central (2/8), lateral (7/15), and both (7/20). Postoperative hypocalcaemia occurred in 7 (16.3%) patients, and vocal cord palsy occurred in 5 (11.6%), whereas 9 patients (20.9%) required reoperation. Death occurred in 4 of our patients.

    Conclusion: High recurrence and reoperative rates were observed in our centre. While the routine prophylactic LND remains controversial, high risk patients may be considered for prophylactic LND. The long-term risk and benefit of prophylactic LND with individualised patient selection in the local setting deserve further studies.

  10. Tan JH, Tan HCL, Noh NAM, Mohamad Y, Alwi RI
    Burns Trauma, 2017;5:37.
    PMID: 29299483 DOI: 10.1186/s41038-017-0102-z
    Background: Well-known trauma mortality prediction scores such as New Injury Severity Score (NISS), Revised Trauma Score (RTS), and Trauma and Injury Severity Score (TRISS) have been externally validated from high-income countries with established trauma databases. However, these scores were never used in Malaysian population. In this current study, we attempted to validate these scoring systems using our regional trauma surgery database.

    Methods: A retrospective analysis of the regional Malaysian Trauma Surgery Database was performed over a period of 3 years from May 2011 to April 2014. NISS, RTS, Major Trauma Outcome Study (MTOS)-TRISS, and National Trauma Database (NTrD)-TRISS scores were recorded and calculated. Individual scoring system's performance in predicting trauma mortality was compared by calculating the area under the receiver operating characteristic (AUC) curve. Youden index and associated optimal cutoff values for each scoring system was calculated to predict mortality. The corresponding positive predictive value, negative predictive value, and accuracy of the cutoff values were calculated.

    Results: A total of 2208 trauma patients (2004 blunt and 204 penetrating injuries) with mean age of 36 (SD = 16) years were included. There were 239 deaths with a corresponding mortality rate of 10.8%. The AUC calculated for the NISS, RTS, MTOS-TRISS, and NTrD-TRISS were 0.878, 0.802, 0.812, and 0.848, respectively. The NISS score with a cutoff value of 24, sensitivity of 86.6% and specificity of 74.3%, outperformed the rest (p 

  11. Wong JW, Tan JH, Abraham RE, Jauhar Ali SN, Kok SY, Tan HCL, et al.
    Medicine (Baltimore), 2024 Mar 22;103(12):e37415.
    PMID: 38518019 DOI: 10.1097/MD.0000000000037415
    The outbreak of Coronavirus disease 2019 (Covid-19) has a significant impact on the mental health of the global population. Updates are needed regarding the mental health status among the local population since limited studies were done so far. This research compared the prevalence of anxiety and depression symptoms among HCWs and non-HCWs. We also evaluated the factors associated with anxiety and depression symptoms among these 2 groups. This was a cross-sectional study conducted between September to December 2022. Online questionnaire was distributed to HCWs from 2 tertiary government hospitals. Non-HCWs from various occupational fields were recruited randomly. Generalised Anxiety Disorder 7 (GAD-7) and Patient Health Questionnaire 9 (PHQ-9) were used to screen for anxiety and depression symptoms respectively. Data were analyzed using IBM SPSS version 28.0. 200 questionnaires were distributed to HCWs and non-HCWs respectively. The response rate was 74.5% from HCWs and 82.5% from non-HCWs (P = .07). A total of 236 individuals (105 HCWs and 131 non-HCWs) were included in the study. Majority were female, married, highly educated and worked more than 8 hours per day. There was no significant difference for the prevalence of anxiety (37.2% vs 44.3%, P = .34) and depression symptoms (37.3% vs 35.1%, P = .75) between HCWs and non-HCWs. Among HCWs, poor workplace support (P = .009) and low income (P = .04) were associated with anxiety symptoms. Younger age (P = .02), single status (P = .01) and poor workplace support (P = .006) were associated with depression symptoms. More non-HCWs with a higher educational level were having anxiety and depression symptoms. Single status (P = .03), working away from home (P = .02), poor family support (P = .03) and quarantine as Covid-19 close contact (P = .04) were also associated with depression symptoms among non-HCWs. There is no significant difference between HCWs and non-HCWs experiencing possible anxiety or depressive symptoms in this study. However, attention should be paid to address associated factors identified among each group to promote good mental health.
  12. Lim RZM, Tan JH, Raja Ram NK, Tan HCL, Ho IKE, Chuah JS, et al.
    World J Surg, 2024 Apr 02.
    PMID: 38563570 DOI: 10.1002/wjs.12162
    BACKGROUND: Limited data exists on Charlson's weighted index of comorbidity (WIC) predictability for postoperative outcomes following perforated peptic ulcer (PPU) surgery. This study assesses the utility of WIC and other predictive scores in forecasting both postoperative mortality and morbidity in PPU.

    MATERIALS & METHODS: Patients with PPUs operated between 2018 and 2021 in a Malaysian tertiary referral center were included. Clinical data were retrospectively analyzed for association with mortality and morbidity measured with the Comprehensive Complication Index (CCI). Predictability of WIC and other predictors were examined using area under receiver-operator characteristic (ROC) curve (AUC).

    RESULTS: Among 110 patients included, 18 died (16.4%) and 36 (32.7%) had significant morbidity postoperatively (High CCI, ≥26.2). Both mortality and high CCI were associated with age >65 years, female sex, comorbidities (diabetes mellitus, hypertension, and renal disease), and American Society of Anesthesiologist score >2. Most patients who died had renal dysfunction, metabolic acidosis, lactate >2 mmol/L upon presentation preoperatively. While surgery >24 h after presentation correlated with mortality and high CCI, the benefit of earlier surgery <6 h or <12 h was not demonstrated. WIC (AUC, 0.89; 95% CI, 0.81-0.99) showed similar predictability to Peptic Ulcer Perforation (PULP) (AUC, 0.97; 95% CI, 0.93-1.00) for mortality. PULP effectively predicted high CCI (AUC, 0.83; 95% CI, 0.73-0.93; p 

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