Displaying all 14 publications

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  1. Arumugasamy N
    Med J Malaya, 1969 Mar;23(3):169-73.
    PMID: 4240068
    Matched MeSH terms: Sarcoma/pathology*
  2. Sengupta S, Murugasu R
    Med J Malaya, 1970 Sep;25(1):70-2.
    PMID: 4249502
    Matched MeSH terms: Sarcoma/pathology*
  3. Yasin NF, Ajit Singh V, Saad M, Omar E
    BMC Cancer, 2015;15:289.
    PMID: 25884718 DOI: 10.1186/s12885-015-1234-9
    Limb salvage surgery is a treatment of choice for sarcomas of the extremities. One of the options in skeletal reconstruction after tumour resection is by using a recycled bone autograft. The present accepted methods of recycling bone autografts include autoclaving, pasteurization and irradiation. At the moment there is lack of studies that compare the effectiveness of various sterilization methods used for recycling bone autografts and their effects in terms of bone incorporation. This study was performed to determine the effects of different methods of sterilization on bone autografts in rabbit by radiological, biomechanical and histopathological evaluations.
    Matched MeSH terms: Sarcoma/pathology
  4. Looi LM, Cheah PL
    Pathology, 1993 Apr;25(2):106-9.
    PMID: 8396229
    This study explores immunohistochemical characteristics that may be of diagnostic value in differentiating clear cell sarcoma of the kidney (CCSK) from Wilms' tumor (WT) and may provide some insight into the histogenesis of CCSK. Formalin-fixed, paraffin-embedded sections of 8 CCSK and 9 WT were stained, using the standard avidin-biotin peroxidase complex method, for vimentin (VIM), Factor-8 related antigen (F8A), epithelial membrane antigen (EMA), desmin (DES), S-100 protein and Mac 387. CCSK cells consistently exhibited moderate to strong diffuse cytoplasmic positivity for VIM and were negative for F8A, EMA, DES, S-100 and Mac 387. In contrast, only patchy groups of stromal cells and primitive glomeruloid structures in WT exhibited VIM-positivity. Blastemal cells were VIM-negative. Stromal cells with rhabdomyomatous differentiation exhibited cytoplasmic positivity for DES. Epithelial cells of maturing tubular structures showed EMA-positivity whereas immature tubular structures were EMA-negative. Neither blastemal, stromal nor epithelial elements in WT were positive for F8A, S-100 or Mac 387. Podocytes and mesangial cells of glomeruli in 3 mid-trimester human abortuses (controls) exhibited moderate to strong VIM-positivity. The importance of differentiating CCSK from WT has been repeatedly emphasized because of its poorer prognosis and the necessity of adding Adriamycin to the chemotherapeutic regime. The consistent VIM-positivity of CCSK cells can be a useful feature in differentiating it from "blastemal-predominant" WT, with which it is often confused. Although vimentin expression by CCSK cells is consistent with a mesenchymal character, the possibility of a histogenetic link with glomerular podocytes or mesangial cells should also be considered.
    Matched MeSH terms: Sarcoma/pathology*
  5. Cheah PL, Looi LM, Lin HP
    Histopathology, 1992 Oct;21(4):365-9.
    PMID: 1328018
    Eight cases of clear cell sarcoma of kidney were seen in the Department of Pathology, University Hospital, Kuala Lumpur, Malaysia over the 16-year period from 1973 to 1989. Five of the patients were males. Six patients were Malay, one Chinese and one Indian. The patients' ages ranged from 8 months to 3 years. Clear cell sarcoma was the original diagnosis in two patients while six were diagnosed as blastemal-predominant Wilms' tumours at presentation. Metastases developed in five patients. Metastatic sites included the thoracic vertebra, skull, orbit, humerus, radius, ulna, shoulder, lung and liver. The prolonged survival, of 9 years and 9 months, seen in one patient despite omission of Adriamycin (doxorubicin) from the chemotherapeutic protocol is highlighted. We also emphasise the histological factors which are of help in differentiating clear cell sarcoma from Wilms' tumour.
    Matched MeSH terms: Sarcoma/pathology*
  6. Lye KL, Nordin N, Vidyadaran S, Thilakavathy K
    Cell Biol. Int., 2016 Jun;40(6):610-8.
    PMID: 26992453 DOI: 10.1002/cbin.10603
    Mesenchymal stem cells (MSCs) have garnered vast interests in clinical settings, especially in regenerative medicine due to their unique properties-they are reliably isolated and expanded from various tissue sources; they are able to differentiate into mesodermal tissues such as bones, cartilages, adipose tissues, and muscles; and they have unique immunosuppressive properties. However, there are some concerns pertaining to the role of MSCs in the human body. On one hand, they are crucial component in the regeneration and repair of the human body. On the contrary, they are shown to transform into sarcomas. Although the exact mechanisms are still unknown, many new leads have pointed to the belief that MSCs do play a role in sarcomagenesis. This review focuses on the current updates and findings of the role of MSCs in their transformation process into sarcomas.
    Matched MeSH terms: Sarcoma/pathology*
  7. Chan CYW, Janarthan N, Vivek AS, Jayalakshmi P
    Med J Malaysia, 2008 Oct;63(4):311-4.
    PMID: 19385491
    Pleomorphic sarcoma is the most common sarcoma. Reports of outcome as well as evaluation of prognostic factors in the literature show great variation. We looked at our experience in treating this tumour at University Malaya Medical Center. This is a review of patients diagnosed with Pleomorphic Sarcoma from January 1990 to December 2005 at University Malaya Medical Center. Outcome measures studied are the overall survival, disease free survival and local recurrence of disease. Prognostic factors for survival and local recurrence which were studied are the tumour size, depth, stage, type of surgery, adjuvant therapy, and surgical margin. There were fifty four patients available for analysis of demographics. The mean age at presentation was 52.3 +/- 16.7 years. There were thirty male patients (56%) and twenty four female patients (44%) in the study population. The patients were predominantly Malay (44.4%) and Chinese (42.6%). There were two Indian patients (3.7%) and five patients from other races (9.3%). Thirty patients had disease affecting the extremities while six patients had disease affecting the trunk. Patients with tumour affecting the trunk had 100% mortality. In patients with tumour affecting the extremity, 46.7% presented with Stage 3 disease. The overall median survival was 39 months. The overall survival rate at 3 years was 53.3% and the 5 years was 30.0%. The disease free survival rate at five years was 27.6%. However, if patients who presented with metastasis were excluded, the 5 year survival rate was 60% while the disease free survival was 53.3%. Recurrence rate was 33.3%. Factors affecting survival was stage, size and location of tumour. No factors were found to correlate with higher local recurrence rate. In conclusion, Pleomorphic Sarcoma is a heterogenous disease with variable outcome. In our centre, late presentation with advanced disease significantly affects the overall outcome of this condition. Tumour size and location are important prognostic factors. Inherent tumour behavior and aggressiveness probably outweigh current treatment modalities as the most important prognostic factor in the management of Pleomorphic Sarcoma.
    Matched MeSH terms: Sarcoma/pathology
  8. Teck Seo S, Singh VA, Yasin NF
    J Orthop Surg (Hong Kong), 2019 6 22;27(2):2309499019854957.
    PMID: 31221016 DOI: 10.1177/2309499019854957
    PURPOSE: Inflammation plays a major role in tumour development, progression and metastasis. Multiple inflammatory markers such as absolute lymphocyte count, neutrophil-lymphocyte ratio (NLR), lymphocyte-monocyte ratio (LMR) and platelet-lymphocyte ratio have been discovered as prognostic markers for various malignancies. We investigate preoperative lymphocyte count and other cell count ratios and their relation to survival and prognosis of sarcoma patients after surgery.

    METHODS: A total of 142 patients from the Orthopaedics Oncology Database were included into this retrospective study. Kaplan-Meier curve and multivariate Cox proportional models were used to calculate the overall survival of patients with sarcoma who underwent radical excision surgery.

    RESULTS: High preoperative LMR is significantly associated with better overall survival and prognosis in sarcoma patients, whereas high preoperative NLR is significantly associated with shorter overall survival and poorer prognosis. Multivariate analysis shows that LMR and NLR are good predictors for overall survival at 3 and 5 years after surgery, respectively. Patients with high preoperative lymphocytes count are associated with longer overall survival, but this association is not statistically significant. Our findings suggest that preoperative NLR and LMR are good predictive markers for survival of sarcoma patients.

    CONCLUSION: LMR and NLR can be used to identify patients at risk for poor clinical outcome, so that a more aggressive course of treatment can be applied to improve outcome. These are cost-effective prognostic tools as they are calculated from routine preoperative peripheral blood counts. In conclusion, preoperative NLR and LMR are good prognostic markers for predicting the clinical outcome of patients with sarcoma.

    Matched MeSH terms: Sarcoma/pathology*
  9. Noraidah M, Jasmi AY
    Malays J Pathol, 2003 Jun;25(1):57-61.
    PMID: 16196379
    Malignant melanoma involving the gastrointestinal tract is diagnosed antemortem in only a small percentage of patients with the disease. Presenting symptoms are often non-specific, causing a diagnostic problem. The vast majority of such melanomas are metastatic from a cutaneous primary, however there is evidence that the tumour can arise de novo in the gastrointestinal system. We report a 74-year-old man with malignant melanoma with an unusual presentation simulating a symptomatic gastric ulcer. He presented with epigastric pain, haematemesis and melaena. Explorative laparotomy revealed a large ulcerated tumour with several pigmented satellite nodules in the proximal stomach, multiple ileal nodules and widespread nodal and liver metastases. Proximal gastrectomy and limited small bowel resection was performed. Histology revealed the tumour to be composed of nests of epithelioid cells with melanin pigment. The tumour cells showed immunohistochemical positivity for S100 protein and HMB45 antibodies. This report emphasizes that melanoma should be a diagnostic consideration in patients with gastric ulcer.
    Matched MeSH terms: Sarcoma/pathology
  10. Hung TH, Chen CM, Tseng CP, Shen CJ, Wang HL, Choo KB, et al.
    Int J Biochem Cell Biol, 2014 Aug;53:55-65.
    PMID: 24814288 DOI: 10.1016/j.biocel.2014.04.011
    Multidrug-resistant (MDR) cancer is a major clinical problem in chemotherapy of cancer patients. We have noted inappropriate PKCδ hypomethylation and overexpression of genes in the PKCδ/AP-1 pathway in the human uterus sarcoma drug-resistant cell line, MES-SA/Dx5 cells, which also overexpress p-glycoprotein (ABCB1). Recent studies have indicated that FZD1 is overexpressed in both multidrug-resistant cancer cell lines and in clinical tumor samples. These data have led us to hypothesize that the FZD1-mediated PKCδ signal-transduction pathway may play an important role in drug resistance in MES-SA/Dx5 cells. In this work, the PKCδ inhibitor Rottlerin was found to reduce ABCB1 expression and to inhibit the MDR drug pumping ability in the MES-SA/Dx5 cells when compared with the doxorubicin-sensitive parental cell line, MES-SA. PKCδ was up-regulated with concurrent up-regulation of the mRNA levels of the AP-1-related factors, c-JUN and c-FOS. Activation of AP-1 also correlated with up-regulation of the AP-1 downstream genes HGF and EGR1. Furthermore, AP-1 activities were reduced and the AP-1 downstream genes were down-regulated in Rottlerin-treated or PKCδ shRNA-transfected cells. MES-SA/Dx5 cells were resensitized to doxorubicin-induced toxicity by co-treatment with doxorubicin and Rottlerin or PKCδ shRNA. In addition, cell viability and drug pump-out ability were significantly reduced in the FZD1 inhibitor curcumin-treated and FZD1 shRNA-knockdown MES-SA/Dx5 cells, indicating involvement of PKCδ in FZD1-modulated ABCB1 expression pathway. Taken together, our data demonstrate that FZD1 regulates PKCδ, and the PKCδ/AP-1 signalling transduction pathway plays an important role in drug resistance in MES-SA/Dx5 cells.
    Matched MeSH terms: Sarcoma/pathology
  11. Sabir BI, Rahmat K, Bux SI, Rajagopal NS, Looi LM, Sia SF
    Clin Neurol Neurosurg, 2013 Oct;115(10):2192-6.
    PMID: 23791432 DOI: 10.1016/j.clineuro.2013.05.023
    Matched MeSH terms: Sarcoma/pathology
  12. Poh ME, Liam CK, Mun KS, Chai CS, Wong CK, Tan JL, et al.
    Thorac Cancer, 2019 09;10(9):1841-1845.
    PMID: 31350945 DOI: 10.1111/1759-7714.13156
    Adjuvant chemotherapy has long been indicated to extend survival in completely resected stage IB to IIIA non-small cell lung cancer (NSCLC). However, there is accumulating evidence that chemotherapy or chemoradiotherapy can induce epithelial-to-mesenchymal transition (EMT) in disseminated or circulating NSCLC cells. Here, we describe the first case of EMT as the cause of recurrence and metastasis in a patient with resected stage IIB lung adenosquamous carcinoma after adjuvant chemotherapy. We review the literature and explore the possible mechanisms by which EMT occurs in disseminated tumor cells (DTC) or circulating tumor cells (CTC) in response to adjuvant chemotherapy (cisplatin) as a stressor. We also explore the possible therapeutic strategies to reverse EMT in patients with recurrence. In summary, although adjuvant cisplatin-based chemotherapy in resected NSCLC does extend survival, it may lead to the adverse phenomenon of EMT in disseminated tumor cells (DTC) or circulating tumor cells (CTC) causing recurrence and metastasis.
    Matched MeSH terms: Sarcoma/pathology*
  13. Hung TH, Li YH, Tseng CP, Lan YW, Hsu SC, Chen YH, et al.
    Cancer Gene Ther., 2015 May;22(5):262-70.
    PMID: 25908454 DOI: 10.1038/cgt.2015.15
    Inappropriate c-MET signaling in cancer can enhance tumor cell proliferation, survival, motility, and invasion. Inhibition of c-MET signaling induces apoptosis in a variety of cancers. It has also been recognized as a novel anticancer therapy approach. Furthermore, reports have also indicated that constitutive expression of P-glycoprotein (ABCB1) is involved in the HGF/c-MET-related pathway of multidrug resistance ABCB1-positive human hepatocellular carcinoma cell lines. We previously reported that elevated expression levels of PKCδ and AP-1 downstream genes, and HGF receptor (c-MET) and ABCB1, in the drug-resistant MES-SA/Dx5 cells. Moreover, leukemia cell lines overexpressing ABCB1 have also been shown to be more resistant to the tyrosine kinase inhibitor imatinib mesylate. These findings suggest that chemoresistant cancer cells may also develop a similar mechanism against chemotherapy agents. To circumvent clinical complications arising from drug resistance during cancer therapy, the present study was designed to investigate apoptosis induction in ABCB1-overexpressed cancer cells using c-MET-targeted RNA interference technology in vitro and in vivo. The results showed that cell viability decreased and apoptosis rate increased in c-MET shRNA-transfected HGF/c-MET pathway-positive MES-SA/Dx5 and MCF-7/ADR2 cell lines in a dose-dependent manner. In vivo reduction of tumor volume in mice harboring c-MET shRNA-knockdown MES-SA/Dx5 cells was clearly demonstrated. Our study demonstrated that downregulation of c-MET by shRNA-induced apoptosis in a multidrug resistance cell line.
    Matched MeSH terms: Sarcoma/pathology
  14. Qi Qi C, Ajit Singh V
    BMJ Case Rep, 2012;2012.
    PMID: 22892228 DOI: 10.1136/bcr.01.2012.5518
    The authors present an interesting case under our follow-up who has had five different forms of tumours with different pathologies throughout his lifetime. He started off with hepatoma, followed by pleomorphic sarcoma of the thigh, adenocarcinoma of the prostate, meningioma and finally schwanoma. He is still alive to this date.
    Matched MeSH terms: Sarcoma/pathology*
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