Displaying publications 601 - 620 of 6272 in total

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  1. Kandasami P, Tan WJ, Norain K
    Med J Malaysia, 2003 Dec;58(5):758-62.
    PMID: 15190664 MyJurnal
    Gastric cancer is an important cause of death among patients with malignancies in Malaysia. Survival of patients with gastric cancer is dependent on the stage at which diagnosis is made. We report our experience in dealing with gastric cancer in a major Ministry of Health Hospitals in Malaysia. A retrospective review of two hundred and fifty consecutive histologically proven gastric adenocarcinoma at Hospital Ipoh for the period January 1988 to 1998 was performed. The study confirms that gastric cancer is a disease of the elderly and has a male preponderance. It is also identifies the Chinese and Indians to be at increased risk of gastric cancer when compared to the Malays. The most striking finding in this study was the very late stage of disease at time of presentation. Eighty-two percent of the patients presented with stage IV disease and curative surgery was offered only to a 16% of them. In a substantial number of patients not even a palliative procedure was offered. Early detection is the key to improving survival in gastric cancer patients. There is an urgent need for clinicians to change their approach to the management of the disease. Patients with dyspeptic symptoms should be investigated early rather then wait for classical symptoms of gastric cancer.
    Matched MeSH terms: Stomach Neoplasms/diagnosis; Stomach Neoplasms/epidemiology*
  2. Siar CH, Jalil AA, Ram S, Ng KH
    J Oral Sci, 2004 Mar;46(1):51-3.
    PMID: 15141724
    Osteoma is a benign tumour consisting of mature bone tissue. It is an uncommon lesion that occurs mainly in the bones of the craniofacial complex. Only a few cases involving the condylar process have been reported. An osteoma of the left condyle causing limited mouth-opening in a 32-year-old Malaysian Chinese female is reported here to alert the practitioner to consider this lesion as a diagnostic possibility in instances of trismus or limited-mouth opening.
    Matched MeSH terms: Mandibular Neoplasms/complications*; Mandibular Neoplasms/pathology
  3. Jafri A, Aziz MY, Ros S, Nizam I
    Med J Malaysia, 2003 Jun;58(2):236-42.
    PMID: 14569744
    This is the first investigation performed to detect the presence of the p53 mutation in Malay patients with gliomas. The p53 gene was amplified using polymerase chain reaction (PCR) from 33 fresh-frozen tumour tissues from patients histologically confirmed as glioma. Four hot spot areas that lie between exon 5 to 8 were screened for mutation by mean of non-isotopic "cold" single strand conformation polymorphism (SSCP) analysis and direct sequencing. The frequency of p53 gene mutation in gliomas examined was 33% (11 of 33). Five (45.5%) cases had mutation in exon 7, four (36.4%) had mutation in exon 8 and two (18.1%) had mutation in exon 6. Seven (63.6%) of 11 mutations were single nucleotide point mutations of which 5 were missense mutations, 1 was nonsense mutation and 1 was, silent mutation. Three (27.3%) showed insertion mutation and 1 (9.1%) showed deletion mutation. Of the point mutations, 57.1% were transitions and 42.9% were transversions. These results suggested that p53 mutations frequently occur in gliomas and this gene does play an important role in the tumourigenesis process of Malay patients with brain tumours.
    Matched MeSH terms: Brain Neoplasms/genetics*; Brain Neoplasms/pathology
  4. Ramanathan K, Han NK
    Med J Malaysia, 1979 Jun;33(4):342-5.
    PMID: 522747
    Matched MeSH terms: Mouth Neoplasms/epidemiology*; Mouth Neoplasms/pathology
  5. Ahluwalia HS, Kandiah S, Kaur H
    Med J Malaysia, 1977 Dec;32(2):172-4.
    PMID: 614488
    Matched MeSH terms: Laryngeal Neoplasms/diagnosis*; Laryngeal Neoplasms/pathology
  6. Yip CH, Evans DG, Agarwal G, Buccimazza I, Kwong A, Morant R, et al.
    World J Surg, 2019 05;43(5):1264-1270.
    PMID: 30610270 DOI: 10.1007/s00268-018-04897-6
    Hereditary breast cancers, mainly due to BRCA1 and BRCA2 mutations, account for only 5-10% of this disease. The threshold for genetic testing is a 10% likelihood of detecting a mutation, as determined by validated models such as BOADICEA and Manchester Scoring System. A 90-95% reduction in breast cancer risk can be achieved with bilateral risk-reducing mastectomy in unaffected BRCA mutation carriers. In patients with BRCA-associated breast cancer, there is a 40% risk of contralateral breast cancer and hence risk-reducing contralateral mastectomy is recommended, which can be performed simultaneously with surgery for unilateral breast cancer. Other options for risk management include surveillance by mammogram and breast magnetic resonance imaging, and chemoprevention with hormonal agents. With the advent of next-generation sequencing and development of multigene panel testing, the cost and time taken for genetic testing have reduced, making it possible for treatment-focused genetic testing. There are also drugs such as the PARP inhibitors that specifically target the BRCA mutation. Risk management multidisciplinary clinics are designed to quantify risk, and offer advice on preventative strategies. However, such services are only possible in high-income settings. In low-resource settings, the prohibitive cost of testing and the lack of genetic counsellors are major barriers to setting up a breast cancer genetics service. Family history is often not well documented because of the stigma associated with cancer. Breast cancer genetics services remain an unmet need in low- and middle-income countries, where the priority is to optimise access to quality treatment.
    Matched MeSH terms: Breast Neoplasms/genetics*; Breast Neoplasms/therapy
  7. Salleh A, Zainuddin ZZ, Mohamed Tarmizi MR, Yap KC, Zamri-Saad M
    Vet Q, 2020 Dec;40(1):250-257.
    PMID: 33045934 DOI: 10.1080/01652176.2020.1836431
    Following its capture in March 2014, an adult female Sumatran rhinoceros frequently showed profuse vaginal bleeding. An ultrasonography suggested the presence of multiple reproductive lesions, including two uterine masses which were suspected to be leiomyomas. Soon after, an open pyometra was confirmed. Later in November 2019, the patient died and necropsy confirmed the presence of two uterine masses; one was located at the cervico-uterine junction and another in the uterine body, with pyometra, and cystic endometrial hyerplasia. Based on histological, special stains, and immunohistochemical examination, it was shown that one of the masses was composed of large, ovoid and polyhedral neoplastic mesenchymal cells with eosinophilic cytoplasm and a few binucleated cells surrounded by collagen fibres. It was tested positive for SMA and vimentin, while negative for desmin, cytokeratin AE1/AE3, EMA, CD34, and S100. The other mass was composed of mesenchymal cells undergoing myxoid degeneration as evidenced by the presence of glycosaminoglycan-rich matrix. It was tested positive for SMA, vimentin, partially positive for desmin, and negative for the other markers. With the aid of human medical nomenclature, these masses were diagnosed as epithelioid leiomyoma and myxoid leiomyoma, respectively. This report provides a clinical presentation, and histologic descriptions of the two variants of leiomyomas that have not been reported in veterinary medicine.
    Matched MeSH terms: Uterine Neoplasms/diagnosis; Uterine Neoplasms/veterinary*
  8. Narhari P, Haseeb A, Lee S, Singh VA
    Indian J Orthop, 2018 2 9;52(1):87-90.
    PMID: 29416176 DOI: 10.4103/ortho.IJOrtho_495_17
    Chondroblastomas are a primary benign cartilaginous tumor that accounts for approximately 1% of all benign bone tumors. Primarily they are treated by curettage. The patient presented 4 years after a successfully treated chondroblastoma (curettage and Bone cement). Wide resection of the proximal tibia with endoprosthesis replacement was done. Lung CT showed multiple lung metastasis and despite starting chemotherapy, he succumbed to the disease. We discuss regarding the possibilities of "aggressive" chondroblastoma and more recently termed chondroblastoma-like osteosarcoma which is a separate entity from chondroblastoma. Aggressiveness in chondroblastoma can be 1 of 3 types as follows: 1. benign chondroblastoma with lung metastasis. 2. malignant chondroblastoma. 3. subsequent malignant transformation of benign chondroblastoma. We have attempted to review the literature and describe the "aggressive" chondroblastoma and chondroblastoma-like osteosarcoma in this report.
    Matched MeSH terms: Bone Neoplasms; Lung Neoplasms; Neoplasms, Connective Tissue
  9. Majeed S, Aripin FHB, Shoeb NSB, Danish M, Ibrahim MNM, Hashim R
    Mater Sci Eng C Mater Biol Appl, 2019 Sep;102:254-263.
    PMID: 31146998 DOI: 10.1016/j.msec.2019.04.041
    The aim of the current study was to biosynthesize the silver nanoparticles (AgNPs) from the bacterial strain of Bacillus cereus (ATCC 14579) extracellularly. When bacterial extract was challenged with 1 mM silver nitrate (AgNO3) the color of the extract changed into brown confirms the formation of nanoparticles. These nanoparticles were capped with bovine serum albumin (BSA). UV- visible spectroscopy showed the absorption peak at 420 nm indicates the formation of AgNPs. Fourier Infra -red (FTIR) attenuated total reflection (ATR) spectroscopy showed amide and amine group associated with AgNPs that stabilizes the nanoparticles. Energy dispersive x-ray spectroscopy (EDX) showed a strong peak of silver confirms the presence of silver. Thermo gravimetric analysis (TGA) analysis was used to determine the protein degradation showed less protein degradation at higher temperature confirms the stability of nanoparticles. Transmission electron microscopy (TEM) showed the AgNPs are well dispersed and spherical, and 5.37 nm to 17.19 whereas albumin coated nanoparticles are size ranges from 11.26 nm to 23.85 nm. The anticancer effect of capped AgNPs (cAgNPs) showed the IC50 value against breast cancer MCF-7 at 80 μg/mL, intestinal colon cancer HCT- 116 60 μg/mL, and bone cancer osteosarcoma MG-63 cell line80 μg/mL while against normal fibroblast cells 3T3 cells showed the IC50 value at 140 μg/mL. Lactate dehydrogenase assay (LDH) showed higher toxicity on MCF-7, HCT-116, and MG-63 cells. The apoptotic study clearly showed the blebbing of membrane, chromatin condensation due to the production of reactive oxygen species (ROS) by ethidium bromide and acridine orange dual staining method. The DNA analysis showed the complete fragmentation of the DNA of treated cells when compared with control cells.
    Matched MeSH terms: Bone Neoplasms/drug therapy; Bone Neoplasms/pathology; Breast Neoplasms/drug therapy; Breast Neoplasms/pathology; Colonic Neoplasms/drug therapy; Colonic Neoplasms/pathology; Neoplasms/drug therapy*; Neoplasms/pathology
  10. Rezayi M, Farjami Z, Hosseini ZS, Ebrahimi N, Abouzari-Lotf E
    Curr Pharm Des, 2018;24(39):4675-4680.
    PMID: 30636591 DOI: 10.2174/1381612825666190111144525
    Small noncoding microRNAs (miRNAs) are known as noninvasive biomarkers for early detection in various cancers. In fact, miRNAs have key roles in carcinogenicity process such as proliferation, apoptosis and metastasis. After cardiovascular disease, cancer is the second cause of death in the world with an estimated 9.6 million deaths in 2018. So, early diagnosis of cancer is critical for successful treatment. To date, several selective and sensitive laboratory-based methods have been applied for the detection of circulating miRNA, but a simple, short assay time and low-cost method such as a biosensor method as an alternative approach to monitor cancer biomarker is required. In this review, we have highlighted recent advances in biosensors for circulating miRNA detection.
    Matched MeSH terms: Neoplasms/blood; Neoplasms/diagnosis*
  11. V S, Thamby SP, Al-Hatamleh MAI, Mohamud R, Abdullah B
    Gulf J Oncolog, 2019 Sep;1(31):83-89.
    PMID: 31591996
    BACKGROUND: Natural Killer/T-cell non-Hodgkin lymphomas are rare and aggressive disease of non-Hodgkin lymphoma characterized by angioinvasion, angiodestruction and necrosis. It has a strong association with Epstein-Barr virus (EBV) as the lymphoma cells are almost invariably infected with the clonal episomal form of EBV. Because of their rarity, it is a challenge to diagnose and treat them even to the experienced pathologists.

    CASE PRESENTATION: The featured case describes a 40-year-old male who presented with symptoms suggestive for sinusitis. Further diagnostic investigation by the functional endoscopic sinus surgery (FESS) revealed a chronic sinusitis with multiple biopsies showing negative for malignancy, viral and bacterial infections and therefore undiagnosed for sinonasal NK/T-cell lymphoma. Subsequently after a month of surgery, he developed multiple lymph nodes in inguinal where biopsy revealed extranodal NK/T-cell non-Hodgkin lymphoma, high grade but in no time for treatment, he finally succumbed to the illness.

    CONCLUSION: The case presented here was initially diagnosed as a chronic sinusitis, not as sinonasal NK/Tcell lymphoma which later developed into extranodal NK/T-cell lymphoma. The prognosis showed improvement for nasal lymphomas but remains poor for disseminated and extranasal lymphomas which are more aggressive with lower survival rate. It is clinically important to differentiate diseases for proper staging and monitoring as they require completely different treatment strategies.

    Matched MeSH terms: Nose Neoplasms/diagnosis*; Nose Neoplasms/pathology
  12. Yahya EB, Alqadhi AM
    Life Sci, 2021 Mar 15;269:119087.
    PMID: 33476633 DOI: 10.1016/j.lfs.2021.119087
    Cancer treatment has been always considered one of the most critical and vital themes of clinical issues. Many approaches have been developed, depending on the type and the stage of tumor. Gene therapy has the potential to revolutionize different cancer therapy. With the advent of recent bioinformatics technologies and genetic science, it become possible to identify, diagnose and determine the potential treatment using the technology of gene delivery. Several approaches have been developed and experimented in vitro and vivo for cancer therapy including: naked nucleic acids based therapy, targeting micro RNAs, oncolytic virotherapy, suicide gene based therapy, targeting telomerase, cell mediated gene therapy, and CRISPR/Cas9 based therapy. In this review, we present a straightforward introduction to cancer biology and occurrence, highlighting different viral and non-viral gene delivery systems for gene therapy and critically discussed the current and various strategies for cancer gene therapy.
    Matched MeSH terms: Neoplasms/genetics; Neoplasms/therapy*
  13. Hamad HA, Enezei HH, Alrawas A, Zakuan NM, Abdullah NA, Cheah YK, et al.
    Molecules, 2020 Aug 26;25(17).
    PMID: 32858793 DOI: 10.3390/molecules25173876
    Hypoxia plays a significant role in solid tumors by the increased expression of hypoxia-inducible factor-1α (HIF-1α), which is known to promote cancer invasion and metastasis. Cancer-cell invasion dynamically begins with the degradation of the extracellular matrix (ECM) via invadopodia formation. The chemical substrates that are utilized by hypoxic cells as fuel to drive invadopodia formation are still not fully understood. Therefore, the aim of the study was to maintain MDA-MB-231 cells under hypoxia conditions to allow cells to form a large number of invadopodia as a model, followed by identifying their nutrient utilization. The results of the study revealed an increase in the number of cells forming invadopodia under hypoxia conditions. Moreover, Western blot analysis confirmed that essential proteins for hypoxia and invadopodia, including HIF-1α, vascular endothelial growth factor (VEGF), metallopeptidase-2 (MMP-2), and Rho guanine nucleotide exchange factor 7 (β-PIX), significantly increased under hypoxia. Interestingly, phenotype microarray showed that only 11 chemical substrates from 367 types of substrates were significantly metabolized in hypoxia compared to in normoxia. This is thought to be fuel for hypoxia to drive the invasion process. In conclusion, we found 11 chemical substrates that could have potential energy sources for hypoxia-induced invadopodia formation of these cells. This may in part be a target in the hypoxic tumor and invadopodia formation. Additionally, these findings can be used as potential carrier targets in cancer-drug discovery, such as the usage of dextrin.
    Matched MeSH terms: Breast Neoplasms/metabolism*; Breast Neoplasms/pathology
  14. Shafiee MN, Chapman C, Barrett D, Abu J, Atiomo W
    Gynecol Oncol, 2013 Nov;131(2):489-92.
    PMID: 23822891 DOI: 10.1016/j.ygyno.2013.06.032
    Endometrial cancer (EC) is the commonest gynaecological cancer in North American and European women. Even though it has been shown that women with polycystic ovary syndrome (PCOS) have a three-fold increase in the risk of developing EC compared to women without PCOS, the precise molecular mechanisms which increase EC risk in women with PCOS remain unclear. Clinical strategies to prevent EC in PCOS are therefore not well researched and understood. Although raised estrogen levels, hyperinsulinaemia and, reduced apoptosis have been suggested as potential mechanisms, there is a lack of clarity about how these factors and other factors may interact to increase EC risk in PCOS. This article reviews the literature, on the potential molecular links between PCOS and EC but argues for a paradigm shift, to a systems biology-based approach in future research into the molecular links between PCOS and EC. The potential challenges of a systems biology-based approach are outlined but not considered insurmountable.
    Matched MeSH terms: Endometrial Neoplasms/genetics*; Endometrial Neoplasms/metabolism*
  15. Jadhav KB, Nagraj SK, Arora S
    J Oral Pathol Med, 2020 Nov 21.
    PMID: 33220092 DOI: 10.1111/jop.13134
    BACKGROUND: miRNA is one of the advanced epigenetic molecular markers correlating with lymph node metastasis in patients with Oral squamous cell carcinoma (OSCC). Numerous published papers are showing correlation of miRNA with metastasis. There is a need to analyze and validate such correlation.

    METHOD: English language literature in major databases from the last 20 years was searched using controlled vocabulary and keywords. Strict inclusion and exclusion criteria were followed for selection of studies. The quality assessment was done as per the QUADAS tool 2 by three independent reviewers. The metanalysis was performed by using random effect model. Standardized mean difference (SMD) was considered as the effect measure. Statistical software used was STATA version 13.1.

    RESULTS: With all inclusion and exclusion criteria, eight studies could qualify for metanalysis. The pooled estimate is found to be 0.13 (-0.35, 0.62), P = .585, which is statistically not significant. This indicates that there is a no significant difference in the fold change between metastasis and no metastasis groups. P-value of chi-square statistic for heterogeneity is

    Matched MeSH terms: Head and Neck Neoplasms; Mouth Neoplasms; Tongue Neoplasms
  16. Balasingham T, Sreenivasan BR
    Matched MeSH terms: Brain Neoplasms; Liver Neoplasms; Neoplasms
  17. Yap JF, Madatang A, Hanafi H
    Orbit, 2020 Apr;39(2):135-138.
    PMID: 31023118 DOI: 10.1080/01676830.2019.1604766
    A 31-year-old male with no known medical illness presented with painless left eye protrusion for the past 2 years. Radiographic features were of an extraconal superior orbital mass with no invasion of adjacent structures. The patient underwent an excisional biopsy of the left superior extraconal mass a week later. The histopathological examination revealed a well-circumscribed lobulated mass with chondroid and myxoid stroma enveloping benign bland-appearing epithelial and myoepithelial cells. These pathological features were consistent with benign chondroid syringoma of the orbit. The patient had an uneventful recovery with no active ocular complaint post-operatively.Despite chondroid syringoma of the orbit being a rare tumour, it should be considered in the differential diagnosis of periorbital masses. Excision of the tumour remains the treatment of choice with histopathological examination as the gold standard of diagnosis. Regular follow-up is warranted in view of possible local recurrence or metastasis.
    Matched MeSH terms: Orbital Neoplasms/pathology; Orbital Neoplasms/surgery*
  18. Lim PC, Ali Z, Khan IA, Khan SI, Kassim NK, Awang K, et al.
    Nat Prod Res, 2021 Feb 12.
    PMID: 33576269 DOI: 10.1080/14786419.2021.1885031
    An undescribed conjugated sesquiterpene, amelicarin (1), together with nine known compounds (2-10) were isolated for the first time from Melicope latifolia. Their structures were elucidated by extensive NMR spectroscopic and mass spectrometric methods. The conjugated sesquiterpene possesses a unique 6/6/9/4-ring fused tetracyclic skeleton. The proposed biosynthesis pathway of 1 consist of three reactions steps: (1) polyketide formation, (2) cyclisation and (3) addition to form the conjugated sesquiterpenoid as final metabolite. Out of the ten isolated metabolites, amelicarin (1) showed activity against 4 cancerous cell lines namely SK-MEL skin cancer, KB oral cancer, BT-549 breast cancer, and SK-OV-3 ovarian cancer with IC50 values between 15 and 25 µg/mL.
    Matched MeSH terms: Mouth Neoplasms; Ovarian Neoplasms; Skin Neoplasms
  19. Singh S, Hassan D, Aldawsari HM, Molugulu N, Shukla R, Kesharwani P
    Drug Discov Today, 2020 01;25(1):223-229.
    PMID: 31738877 DOI: 10.1016/j.drudis.2019.11.003
    Immune checkpoint inhibitors (ICIs) are revolutionizing the treatment of many cancers and have demonstrated their potential as 'cancer terminators'. However, ICI treatment also has constraints, such as its immune-related adverse events (irAEs) and therapeutic resistance. These drawbacks are gradually being overcome through better knowledge of the immune system, history of disease, duration of treatment, combinational drug regimes, adequate biomarkers, and effective patient response monitoring. In this review, we discuss the present ICI therapy landscape and its therapeutic outcomes for various diseases. We also highlight biomarkers related to the ICI response.
    Matched MeSH terms: Neoplasms/drug therapy*; Neoplasms/immunology
  20. Appalanaido GK, Bahajjaj SIBZ, Shukor SA, Ahmad MZ, Francis HCH
    Oxf Med Case Reports, 2021 Apr;2021(4):omab016.
    PMID: 33948189 DOI: 10.1093/omcr/omab016
    Liver is the most common site for metastasis from colorectal cancer (CRC). Non-surgical treatment options for oligometastatic CRC confined to the liver which represents an intermediate state in the metastatic cascade are fast expanding. Currently, several liver-directed local therapeutic options are available, such as hepatic arterial infusion (HAI) therapy, radio-frequency ablation (RFA), transarterial chemoembolization (TACE), stereotactic body radiotherapy and high dose rate brachytherapy (HDRBT). Many factors such as patient's fitness, liver function (LF), tumour size, location of the tumour in the liver and scheduling of systemic therapy need to be considered when selecting patients for surgery or local liver-directed therapy. This case report illustrates a successful local treatment with staged HDRBT for a large and unresectable, liver only oligometastatic disease from CRC. This patient underwent 4 cycles of chemotherapy (FOLFOX 4) followed by primary tumour resection and first stage of HDRBT to liver for a residual 14 cm tumour after the chemotherapy. After completing a further 4 cycles of chemotherapy with the same regimen, the tumour remained stable at 8 cm. She underwent a second stage of HDRBT to the same lesion and a repeat PET-CT scan done 8 weeks after the second HDRBT showed complete metabolic response. To our knowledge, this is the largest CRC metastatic liver lesion that has been successfully treated with HDRB.
    Matched MeSH terms: Colonic Neoplasms; Liver Neoplasms; Colorectal Neoplasms
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