Displaying publications 1 - 20 of 25 in total

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  1. Sivalingam S, Krishnasamy S, Yakub MA
    Asian Cardiovasc Thorac Ann, 2015 Jun;23(5):612-4.
    PMID: 24962807 DOI: 10.1177/0218492314540667
    A 9-year-old boy was referred with a perimembranous ventricular septal defect. At birth, he had undergone a right thoracotomy with ligation of a tracheoesophageal fistula, cervical esophagostomy, and feeding gastrostomy. At 2 years of age, he had gastric tube reconstruction with a pull-through retrosternally, anterior to the heart, and an end-to-end esophagogastric anastomosis. Via a right anterolateral thoracotomy through the previous scar, the entire gastric tube was mobilized away from the sternum to facilitate a median sternotomy. With the patient supine, a median sternotomy was performed without difficulty, and the ventricular septal defect was closed under cardiopulmonary bypass.
  2. Krishnasamy S, Kew EP, Bishay E
    J Thorac Dis, 2019 Mar;11(Suppl 3):S478-S479.
    PMID: 30997252 DOI: 10.21037/jtd.2019.01.67
  3. Krishnasamy S, Tang CY, Tan PH
    Indian J Thorac Cardiovasc Surg, 2024 May;40(3):332-340.
    PMID: 38681715 DOI: 10.1007/s12055-023-01600-w
    PURPOSE: Adenoid cystic carcinoma (ACC) of the trachea is a rare malignancy. We report a patient with ACC who underwent multimodal management including tracheal resection. A systematic review was also conducted on tracheal resection for ACC.

    METHODS: A literature search was conducted on MEDLINE, Embase, and PubMed using the search terms "trachea AND adenoid cystic carcinoma AND (surgery OR resection)" and articles from 2000 to August 2021 were identified. A total of 29 journal articles were included in the review.

    RESULTS: A total of 403 patients underwent surgery for tracheal ACCs. The mean age was 48.1 years and 54.7% were female. The commonest anatomical location was the lower trachea (46.9%). The mean time from symptom onset to diagnosis was 16.6 months with the commonest symptom being dyspnoea (52%). Fifty-eight percent of the patients had intraluminal growth. Tracheal resection (46.2%) and access via thoracotomy (41.4%) were the commonest procedures described. The mean length of trachea resected was 39.2 mm and the mean tumour size was 31.5 mm. 16.8% of lymph nodes were involved and 73.8% of cases had positive resection margins. The overall complication rate was 1.4-5.4% and the in-hospital mortality rate was 9.8%. The overall survival reported was 61.7% at 5 years and 54.6% at 10 years.

    CONCLUSION: Surgical resection followed by adjuvant radiotherapy is the mainstay in the treatment of tracheal ACC, notwithstanding the high rates of involved margins. Achieving tension-free anastomosis should be the first priority given the favourable response of adjuvant therapies in reducing recurrence rate and improving overall survival.

  4. Krishnasamy S, Krishna Nair A, Hashim SA, Raja Mokhtar RA
    Interact Cardiovasc Thorac Surg, 2019 12 01;29(6):976-977.
    PMID: 31363757 DOI: 10.1093/icvts/ivz191
    Liposarcoma is the second most common type of soft tissue malignancy in adults. They are malignant tumours with a mesenchymal origin. Mediastinal liposarcoma accounts for <1% of mediastinal tumours and 2% of liposarcoma. We report a patient with mediastinal liposarcoma who presented with cardiac tamponade, 25 years after the initial liposarcoma in the popliteal fossa.
  5. Ng SH, Kelly B, Se CH, Chinna K, Sameeha MJ, Krishnasamy S, et al.
    Glob Health Action, 2014 Dec;7(1):25169.
    PMID: 28672562 DOI: 10.3402/gha.v7.25169
    Background Food advertising on television (TV) is well known to influence children's purchasing requests and models negative food habits in Western countries. Advertising of unhealthy foods is a contributor to the obesogenic environment that is a key driver of rising rates of childhood obesity. Children in developing countries are more at risk of being targeted by such advertising, as there is a huge potential for market growth of unhealthy foods concomitant with poor regulatory infrastructure. Further, in developing countries with multi-ethnic societies, information is scarce on the nature of TV advertising targeting children. Objectives To measure exposure and power of TV food marketing to children on popular multi-ethnic TV stations in Malaysia. Design Ethnic-specific popular TV channels were identified using industry data. TV transmissions were recorded for each channel from November 2012 to August 2013 (16 hr/day) for randomly selected weekdays and weekend days during normal days and repeated during school holidays (n=88 days). Coded food/beverage advertisements were grouped into core (healthy), non-core (non-healthy), or miscellaneous (unclassified) food categories. Peak viewing time (PVT) and persuasive marketing techniques were identified. Results Non-core foods were predominant in TV food advertising, and rates were greater during school holidays compared to normal days (3.51 vs 1.93 food ads/hr/channel, p<0.001). During normal days' PVT, the ratio of non-core to core food advertising was higher (3.25 food ads/hr/channel), and this more than trebled during school holidays to 10.25 food ads/hr/channel. Popular channels for Indian children had the lowest rate of food advertising relative to other ethnic groups. However, sugary drinks remained a popular non-core product advertised across all broadcast periods and channels. Notably, promotional characters doubled for non-core foods during school holidays compared to normal days (1.91 vs 0.93 food ads/hr/channel, p<0.001). Conclusions This study highlights non-core food advertising, and predominantly sugary drinks are commonly screened on Malaysian TV channels. The majority of these sugary drinks were advertised by multinational companies, and this observation warrants regulatory attention.
  6. Johari B, Abdul Aziz YF, Krishnasamy S, Looi LM, Hashim SA, Raja Mokhtar RA
    Iran J Radiol, 2015 Apr;12(2):e11197.
    PMID: 26060549 DOI: 10.5812/iranjradiol.11197
    The presence of tumor thrombus in the right atrium is frequently the result of direct intraluminal extension of infra-diaphragmatic malignancy into the inferior vena cava (IVC) or supradiaphragmatic carcinoma into the superior vena cava (SVC). Right atrial tumor thrombus with extension into both SVC and IVC has not been reported in the literature. We present a patient who presented with symptoms of right atrial and SVC obstruction. Imaging revealed presence of a thrombus in the right atrium, extending to the SVC and IVC, with the additional findings of a left adrenal mass and multiple liver lesions. The histopathological examination of the right atrial mass revealed metastatic adenocarcinoma cells. The patient was given a presumptive diagnosis of metastatic adenocarcinoma, most likely adrenal in origin, with multiple hepatic lesions suspicious for metastasis. The clinical outcome of the patient was not favorable; the patient succumbed before the adrenal mass could be confirmed to be the primary tumor. This case highlights that in patients manifesting with extensive cavoatrial thrombus as, the existence of primary carcinoma should be considered especially in the adrenal cortex or in the lung.
  7. Hashim S, Chin LY, Krishnasamy S, Sthaneswar P, Raja Mokhtar RA
    J Cardiothorac Surg, 2015;10:32.
    PMID: 25890367 DOI: 10.1186/s13019-015-0230-0
    Recently a biocompatible bone adhesive was introduced in addition to the sternal wires to expedite sternal union and improve patient recovery. In this study we aim to objectively assess the biomarker of pain in patient who received the biocompatible bone adhesive.
  8. Thiagamani SMK, Krishnasamy S, Muthukumar C, Tengsuthiwat J, Nagarajan R, Siengchin S, et al.
    Int J Biol Macromol, 2019 Nov 01;140:637-646.
    PMID: 31437507 DOI: 10.1016/j.ijbiomac.2019.08.166
    This work focuses on the fabrication of hybrid bio-composites using green epoxy as the matrix material, hemp (H) and sisal (S) fibre mats as the reinforcements. The hybrid composite with sisal/hemp fibres were fabricated by cost effective hand lay-up technique, followed by hot press with different stacking sequences. Static properties of the composites such as tensile, compressive, inter-laminar shear strengths (ILSS) and hardness were examined. The physical properties such as density, void content, water absorption and thickness swelling were also analyzed. The experimental results indicate that hybrid composites exhibited minor variation in tensile strength when the stacking sequence was altered. The hybrid composite with the intercalated arrangement (HSHS) exhibited the highest tensile modulus when compared with the other hybrid counterparts. Hybrid composites (SHHS and HSSH) offered 40% higher values of compressive strength than the other layering arrangements. HHHH sample exhibited the highest ILSS value of 4.08 MPa. Typical failure characteristics of the short beam test such as inter-laminar shear cracks in the transverse direction, micro-buckling and fibre rupture were also observed.
  9. Krishnasamy S, Sivalingam S, Dillon J, Mokhtar RAR, Yakub A, Singh R
    PMID: 33577258 DOI: 10.21470/1678-9741-2020-0207
    INTRODUCTION: The presence of aortic regurgitation (AR) in the setting of ventricular septal defect (VSD) has always been a management challenge.

    METHODS: This is a retrospective study looking at patients who underwent VSD closure with or without aortic valve intervention between January 1st, 1992 and December 31st, 2014 at the Institute Jantung Negara. This study looked at all cases of VSD and AR, where AR was classified as mild, moderate, and severe, the intervention done in each of this grade, and the durability of that intervention. The interventions were classified as no intervention (NI), aortic valve repair (AVr), and aortic valve replacement (AVR).

    RESULTS: A total of 261 patients were recruited into this study. Based on the various grades of AR, 105 patients had intervention to their aortic valve during VSD closure. The rest 156 had NI. All patients were followed up for a mean time of 13.9±3.5 years. Overall freedom from reoperation at 15 years was 82.6% for AVr. Various factors were investigated to decide on intervening on the aortic valve during VSD closure. Among those that were statistically significant were the grade of AR, size of VSD, age at intervention, and number of cusp prolapse.

    CONCLUSION: We can conclude from our study that all moderate and severe AR with small VSD in older patients with more than one cusp prolapse will need intervention to their aortic valve during the closure of VSD.

  10. Hashim SA, Amin MA, Nair A, Raja Mokhtar RA, Krishnasamy S, Cheng K
    Heart Lung Circ, 2018 May;27(5):e59-e63.
    PMID: 29246681 DOI: 10.1016/j.hlc.2017.11.011
    The revision of an internal mammary artery graft anastomosis because of a technical error can be time-consuming and complicated and may lead to complications. Here, we describe the technical details and our early experience of using a standard transit-time flowmeter to exclude technical errors and facilitate rapid decision making for anastomosis revision in an arrested heart during aortic cross-clamping in the absence of ultrasound guidance.
  11. Krishnasamy S, Sahid SM, Hashim SA, Singh S, Chung F, Mokhtar RAR, et al.
    J Thorac Dis, 2019 Dec;11(12):5453-5462.
    PMID: 32030264 DOI: 10.21037/jtd.2019.11.44
    Background: Obstructive sleep apnea (OSA) is a serious health disorder which contributes to cardiovascular complications, decreased work productivity, automobile accidents, and death. This condition is characterized by a temporary cessation of breathing resulting due to upper airway closure during a person's sleep. Strain to the heart caused by this repetitive hypoxic insult can lead to postoperative complications for patients undergoing heart surgery. Recognizing cardiac surgical patients with OSA is important. Early recognition and intervention such as use of BiPAP device can reduce the postoperative complications due to OSA.

    Methods: The aim of this study is to identify the incidence of unrecognized OSA in cardiac surgical patients. This is a retrospective analysis of a prospective data of the study which was done between July 2012 and July 2013 in University Malaya Medical Center. All patients undergoing elective cardiac surgery were recruited and the demographic data, questionnaire and the portable sleep study results were obtained. Patients were followed up till 30 days to record any complications. Data were entered in SPSS version 17 and analysis was done.

    Results: The incidence of OSA was 61.4% and 43.5% were moderate to severe OSA. There was male predominance of OSA (79%) with a mean age of 60 years. OSA subjects had shorter inter-incisor distance (4.18±0.6 cm) and larger waistline (94.1±12.1 cm). The STOP-Bang questionnaire has a sensitivity of 75.8% in predicting apnoa-hypopnea index (AHI) ≥5/hour.

    Conclusions: OSA can be diagnosed with a simple screening questionnaire and a bedside portable sleep study. Cardiac patients diagnosed with OSA can be pre-emptively given extra attention in managing their postoperative care.

  12. Krishnasamy S, Mokhtar RAR, Singh R, Sivallingam S, Aziz YFA, Mathaneswaran V
    Braz J Cardiovasc Surg, 2021 Oct 17;36(5):707-716.
    PMID: 33438849 DOI: 10.21470/1678-9741-2020-0433
    INTRODUCTION: Rapid prototyping is a process by which three-dimensional (3D) computerized surface models are converted into physical models. In this study, a 3D heart bio model was created using the rapid prototyping method and the accuracy of this heart model was assessed by clinicians.

    METHODS: The two-dimensional images of normal heart from gated computed tomography scan datasets were used to create a 3D model of the heart. The slices were then processed using the software BioModroid and printed with the 3D printer. The evaluation of the model was performed by a questionnaire answered by four cardiothoracic surgeons, 12 cardiologists, five radiologists, and nine surgical registrars.

    RESULTS: Eighty-six percent of the anatomy structures showed in this model scored 100% accuracy. Structures such as circumflex branch of left coronary artery, great cardiac vein, papillary muscle, and coronary sinus were each rated 77%, 70%, 70%, and 57% accurate. Among 30 clinicians, a total of 93% rated the model accuracy as good and above; 64% of the clinicians evaluated this model as an excellent teaching tool for anatomy class. As a visual aid for surgery or interventional procedures, the model was rated excellent (40%), good (50%), average (23%), and poor (3%); 70% of the clinicians scored the model as above average for training purpose. Overall, this 3D rapid prototyping cardiac model was rated as excellent (33%), good (50%), and average (17%).

    CONCLUSION: This 3D rapid prototyping heart model will be a valuable source of anatomical education and cardiac interventional management.

  13. Hossain MA, Ganesan PB, Sandaran SC, Rozali SB, Krishnasamy S
    Environ Sci Pollut Res Int, 2017 Dec;24(34):26521-26533.
    PMID: 28948458 DOI: 10.1007/s11356-017-0241-6
    Microwave pyrolysis of oil palm fiber (OPF) with three types of Na-based catalysts was experimentally investigated to produce biochar. Sodium hydroxide (NaOH), sodium chloride (NaCl), and sodium carbonate (Na2CO3) with purity 99.9% were selected for this investigation. Microwave muffle reactor (Model: HAMiab-C1500) with a microwave power controller including a microwave generator was used to perform the microwave pyrolysis. OPF particles were used after removing foreign materials, impurities, and dust. Microwave power ranges from 400 to 900 W, temperature ranges from 450 to 700 °C, and N2 flow rates ranges from 200 to -1200 cm3/min were used along with all three Na-based catalysts for this investigation. Lower microwave power, temperature, and N2 flow rate have been found favorable for higher yield of biochar. NaOH is to be found as the more suitable catalyst than NaCl and Na2CO3 to produce biochar. A maximum biochar yield (51.42 wt%) has been found by using the catalysts NaOH at N2 flow rate of 200 cm3/min. One sample of the biochar (maximum yield without catalysts) was selected for further characterization via thermo gravimetric analysis (TGA), scanning electron microscopy (SEM), BET surface area, Fourier transform infrared spectroscopy (FTIR), and ultimate and proximate analysis. SEM and BET surface area analysis showed the presence of some pores in the biochar. High percentage of carbon (60.24 wt%) was also recorded in the sample biochar. The pores and high percentage of carbon of biochar have significant impact on soil fertilization by increasing the carbon sequestration in the soil. It assists to slow down the decomposition rate of nutrients from soil and therefore enhances the soil quality.
  14. Mohamed Haris NH, Krishnasamy S, Chin KY, Mariappan V, Arumugam M
    Nutrients, 2023 Jun 10;15(12).
    PMID: 37375611 DOI: 10.3390/nu15122707
    Background: Patients with plaque psoriasis have an increased risk of metabolic syndrome. However, no studies have assessed the nutritional status or screening methods of this population. Aims: This review aimed to identify and summarise metabolic syndrome screening criteria and the tools/methods used in nutrition assessment in patients with plaque psoriasis. Data synthesis: PubMed, Web of Science, Ovid and Scopus were searched from inception to March 2023, following the Arkensey and O'Malley framework, to identify articles that report nutritional assessment methods/tools and metabolic screening criteria. Twenty-one studies were identified. Overall, these studies used four different screening criteria to define metabolic syndrome. Patients with psoriasis had a high prevalence of metabolic syndrome and had a poor nutritional status compared to controls. However, only anthropometric measures such as weight, height and waist circumference were employed to determine the nutritional status. Only two studies assessed the vitamin D status. Conclusions: Patients with psoriasis have a poor nutritional status, and they are at risk of nutrient deficiencies. However, these health aspects are not routinely assessed and may increase the risk of malnutrition among these patients. Therefore, additional assessments, such as body composition and dietary assessment, are needed to determine the nutritional status to provide a suitable intervention.
  15. Ke TJ, Sameeha MJ, Siah KTH, Jeffri PBQB, Idrus NAB, Krishnasamy S
    Nutrients, 2024 Oct 23;16(21).
    PMID: 39519430 DOI: 10.3390/nu16213596
    The low fermentable oligo-, di-, mono-saccharides and polyols (FODMAP) diet (LFD) is a second-line dietary intervention for irritable bowel syndrome (IBS) patients, involving FODMAP restriction, reintroduction, and personalization, and it needs to be delivered by dietitians. However, the application of this diet among Malaysian IBS patients is not well understood. This study aimed to explore the practices and barriers in delivering the LFD among Malaysia dietitians. Semi-structured qualitative interviews were conducted online with practicing dietitians until the data reached saturation. All the interview sessions were audio recorded and transcribed verbatim. Thematic analysis was used to analyze the data. Eleven dietitians were interviewed, with 36.4% (n = 4) having more than 10 years of experience. The following four themes regarding their practices emerged: 1. dietary advice on FODMAP restriction; 2. duration of FODMAP restriction phase; 3. references used to get information about FODMAPs, and 4. strategies on reintroduction. Meanwhile, the following seven barriers were identified: 1. lack of culturally relevant educational materials; 2. limited knowledge about the LFD; 3. inadequate formal training among dietitians; 4. lack of integration in multi-disciplinary care; 5. low health literacy of patients; 6. low compliance rate among patients, and 7. restrictions for certain populations. LFD implementation in Malaysia is not standardized as only experienced dietitians can provide dietary evidence-based advice. Lack of training and culturally specific resources are some of the main barriers that were identified to be limiting the implementation of the diet. Therefore, there is a need for training programs and resource development to support Malaysian dietitians in managing IBS patients.
  16. Manokaran P, Krishnasamy S, Aman RRABR, Teoh VWY, Loch A
    Indian J Thorac Cardiovasc Surg, 2024 Jan;40(1):68-77.
    PMID: 38125320 DOI: 10.1007/s12055-023-01580-x
    Pseudoaneurysms of the aortic root are rare. A case of prosthetic aortic valve infection progressing from a confined intramural abscess to a ruptured abscess communicating with the aorta and forming a large pseudoaneurysm is described. Additionally, data from all cases and case series, published between 2000 and 2021, was analyzed. A PUBMED search for the keywords "aortic root mycotic aneurysm," "aortic root abscess AND infective endocarditis," and "aortic root mycotic aneurysm AND infective endocarditis" yielded 152 publications (with 157 cases described): Aortic pseudoaneurysm is more common in males (80.9%, n = 127). Mean age is 51 years (4 months-84 years). The most common symptom is fever (68.5%, n = 102). Mean time until diagnosis is 27.2 days. Embolic complications are present in 17.8% (n = 28) at diagnosis. Most cases are due to valvular infections (n = 72 cases, 45.9%). Prior cardiac surgery is documented in 49.0% (n = 77). The mean time interval for developing aortic root abscess following heart surgery is 32.2 months. 22.3% (n = 35) are immunocompromised. Aetiological agents were Staphylococcus sp. (34.1%, n = 47) and Streptococcus sp. (23.2%, n = 32). Mean antimicrobial therapy lasts 58.5 days. Outcome with surgery is superior to medical treatment: overall inpatient mortality 18.5% (n = 27); with surgery 12.2% (n = 15 out of 123 patients), with only medical management 47.8% (n = 11 out of 23 patients). In conclusion, aortic root pseudoaneurysm occurs most commonly in middle-aged male patients. History of prior aortic procedures is commonly present. Correct diagnosis hinges on detailed history, transoesophageal echocardiography, and computed tomography (CT) aorta. Surgery is the preferred therapeutic option.

    SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s12055-023-01580-x.

  17. Krishnasamy S, Mokhtar RAR, Musa AF, Cheong XP, Fa TY
    Indian J Thorac Cardiovasc Surg, 2024 Sep;40(5):554-563.
    PMID: 39156055 DOI: 10.1007/s12055-024-01752-3
    BACKGROUND: The introduction of endoscopic saphenous vein harvesting (ESVH) has been reported to reduce wound pain and infection, compared with open saphenous vein harvesting (OSVH) techniques. There are still controversies regarding this technique. The aim of our study is to investigate the endothelial preservation of saphenous vein (SV) grafts harvested by different techniques. Further observations were made for harvesting and closure time, incision length and effect of pressure distension of the veins to the vein endothelium.

    METHODS: Prospective observational study of sixty human saphenous vein grafts was performed to evaluate endothelial preservation by haematoxylin-eosin and Cluster of Differentiation 31 (CD 31) staining. Saphenous vein was harvested endoscopically either by closed CO2 (carbon dioxide) ESVH, open CO2 ESVH or OSVH harvesting technique. Demographic data and intra-operative data were collected. Two saphenous vein samples were collected from each patient to compare differences before and after distension of the veins. Both haematoxylin-eosin and immunohistochemistry slides were imaged by a high-resolution slide scanning system.

    RESULTS: Open CO2 ESVH group showed the highest number of endothelial detachments. Mean scoring of the immunohistochemistry method using the CD31 antibody was much lower in the open CO2 ESVH group (33.25% ± 28.71, P 

  18. Ong HS, Krishnasamy S, Rajandram R, Amirthalingam A, Yusof TNT, Sivalingam S
    Ann Pediatr Cardiol, 2024;17(4):264-271.
    PMID: 39698423 DOI: 10.4103/apc.apc_110_24
    BACKGROUND: The management of ventricular septal defect (VSD) alongside mitral regurgitation (MR) in pediatric patients remains a contentious issue due to the intricacies of cardiac surgery and the need to minimize ischemic time. Despite observations of MR regression following VSD closure, definitive guidelines for this patient subset are lacking, particularly concerning the management of the subgroup of patients with moderate MR. The objective of the study is to explore the factors influencing the choice between surgical intervention and conservative management for the mitral valve (MV) in VSD patients with moderate MR.

    MATERIALS AND METHODS: A retrospective cohort study from January 2000 to December 2015, we analyzed management trends and focused on 53 patients with both VSD and moderate MR. This cohort was subdivided into four groups: first by their MV pathology, and then stratified by the receipt of intervention towards the diseased MV. Our primary goal was to identify correlations, especially concerning surgical outcomes such as mortality and need for re-operation. Statistical significance is determined when the P value is lower than 0.05.

    RESULTS: There were no notable differences in preoperative variables across four cohort groups, apart from the cross-clamp duration which was longest in Group B intervention. Outcome analysis showed survival rates that were higher in cohort groups that underwent intervention toward the disease MV regardless of existing MV morphology, although results were not statistically significant. Cox model analysis found no correlation between the cohort groups and postoperative outcomes, but cross-clamp duration significantly correlated with mortality.

    CONCLUSIONS: In cases of VSD with moderate MR with associated pathologies of the valvular apparatus, opting for MV repair (MVr) appears to improve survival outcomes without significantly increasing postoperative morbidity. Similarly, for patients with moderate MR and isolated annular dilatation, surgical MVr is observed to have better survival trend compared to the control group.

  19. Xi Y, Zeng J, Zhou Y, Shen W, Taniguchi H, Rajandram R, et al.
    J Thorac Dis, 2024 Nov 30;16(11):7819-7835.
    PMID: 39678883 DOI: 10.21037/jtd-24-1622
    BACKGROUND: The 26S non-ATPase regulatory subunit 11 (PSMD11) is a multiprotein complex that participates in the ATP-dependent degradation of ubiquitinated proteins and is essential to the regulation of embryonic stem cell proteasome activity. PSMD11 has been demonstrated to be a factor contributing to the emergence and progression of cancer cells. However, the prognostic value and potential biological function of PMSD11 in lung adenocarcinoma (LUAD) remains unclear. The aim of this study was to comprehensively investigate the prognostic and biological value of PSMD11 in LUAD.

    METHODS: We primarily endeavored to comprehensively investigate the prognostic and predictive value of PSMD11 in patients with LUAD. Additionally, we aimed to further clarify the underlying mechanisms of PSMD11 in LUAD tumorigenesis and progression via rigorous bioinformatics analyses, including expression analysis, survival analysis, clinicopathological analysis, immune microenvironment analysis, somatic mutation analysis, drug analysis, and cuproptosis analysis. Subsequently, we examined effect of PSMD11 expression on immune escape in a non-small cell lung cancer (NSCLC) cell-T cell coculture model.

    RESULTS: We found that PSMD11 had a significantly higher expression in LUAD tissues than in normal lung tissues. Three clinical characteristics (age, stage, and overall survival event) exhibited significant differences between the PSMD11 high- and low-expression groups. In biological function, PSMD11 appears to exert its tumorigenic effects predominantly in pathways related to DNA replication and membrane-gated channel functions. Notably, we observed that PSMD11 exhibited the strongest positive correlation with T helper 2 cells, gamma-delta T cells, and T regulatory cells and the highest negative correlation with B cells, mast cells, and CD8+ T cells. Furthermore, we found that the expression of cuproptosis genes (DLAT, DLD, and PDHA1) was positively correlated with the expression of PSMD11 (P<0.001).

    CONCLUSIONS: These results indicate that PSMD11 has the potential to be a novel therapeutic target and sensitive biomarker for patients with LUAD.

  20. Abu Bakar N, Abdul Aziz YF, Singh Sandhu R, Fadzli F, Yaakub NA, Krishnasamy S, et al.
    Heart Lung Circ, 2013 Apr;22(4):305-8.
    PMID: 22921797 DOI: 10.1016/j.hlc.2012.07.016
    Pericardial cysts are uncommon mediastinal lesions that are usually congenital in origin. Patients are usually asymptomatic and the cysts are generally discovered on routine radiography for unrelated purposes. This case illustrates a symptomatic presentation of a haemorrhagic pericardial cyst in which radiographic, echocardiographic and multislice (MRI and CT) imaging were performed. The imaging findings were not typical of pericardial cysts leading to a diagnostic quandary despite the varied imaging techniques. In conclusion, it is important to appreciate that the imaging findings of pericardial cysts can be varied. Radiologists and clinicians alike should be aware of this variability.
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