Displaying publications 261 - 275 of 275 in total

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  1. Subrayan V, Khaw KW, Peyman M, Koay AC, Tajunisah I
    Ophthalmologica, 2013;229(4):208-11.
    PMID: 23548379 DOI: 10.1159/000348630
    To evaluate the outcome of intravitreal bevacizumab in the treatment of radiation-induced cystoid macular oedema among patients who underwent external beam radiotherapy for nasopharyngeal carcinoma.
    Matched MeSH terms: Nasopharyngeal Neoplasms/radiotherapy*
  2. See MH, Sinnadurai S, Lai LL, Tan KL, Teh MS, Teoh LY, et al.
    Surgery, 2021 12;170(6):1604-1609.
    PMID: 34538341 DOI: 10.1016/j.surg.2021.08.001
    BACKGROUND: Although immediate breast reconstruction is increasingly becoming popular worldwide, evidence from resource-limited settings is scarce. We investigated factors associated with immediate breast reconstruction in a multiethnic, middle-income Asian setting. Short-term surgical complications, timing of initiation of chemotherapy, and survival outcomes were compared between women undergoing mastectomy alone and their counterparts receiving immediate breast reconstruction.

    METHODS: This historical cohort study included women who underwent mastectomy after diagnosis with stage 0 to stage IIIa breast cancer from 2011 to 2015 in a tertiary hospital. Multivariable regression analyses were used to assess factors associated with immediate breast reconstruction and to measure clinical outcomes.

    RESULT: Out of 790 patients with early breast cancer who had undergone mastectomy, only 68 (8.6%) received immediate breast reconstruction. Immediate breast reconstruction was independently associated with younger age at diagnosis, recent calendar years, Chinese ethnicity, higher education level, and invasive ductal carcinomas. Although immediate breast reconstruction was associated with a higher risk of short-term local surgical complications (adjusted odds ratio: 3.58 [95% confidence interval 1.75-7.30]), there were no significant differences in terms of delay in initiation of chemotherapy, 5-year disease-free survival, and 5-year overall survival between both groups in the multivariable analyses.

    CONCLUSION: Although associated with short-term surgical complications, immediate breast reconstruction after mastectomy does not appear to be associated with delays in initiation of chemotherapy, recurrence, or mortality after breast cancer. These findings are valuable in facilitating shared surgical decision-making, improving access to immediate breast reconstruction, and setting priorities for surgical trainings in middle-income settings.

    Matched MeSH terms: Radiotherapy, Adjuvant/statistics & numerical data
  3. Sarinah B, Hisham AN
    Asian J Surg, 2010 Jan;33(1):20-4.
    PMID: 20497878 DOI: 10.1016/S1015-9584(10)60004-8
    Primary thyroid lymphoma is uncommon and accounts for less than 2-5% of all thyroid malignancies. The aim of the present study was to review our experience and management of primary thyroid lymphoma and to discuss the diagnostic and therapeutic considerations.
    Matched MeSH terms: Radiotherapy
  4. Menon BS, Alagaratnam J, Juraida E, Mohamed M, Ibrahim H, Naing NN
    Pediatr Blood Cancer, 2009 Feb;52(2):215-7.
    PMID: 18855905 DOI: 10.1002/pbc.21791
    The aims of this study were to review the presenting features, treatment and outcome for Malaysian children with retinoblastoma currently.
    Matched MeSH terms: Radiotherapy
  5. Lin HP
    Ann Acad Med Singap, 1993 Mar;22(2):182-6.
    PMID: 8363329
    Significant advances in diagnosis and management have cured the majority of children with cancer. In the leukaemias, the commonest childhood malignancy, intensive induction-consolidation is important to ensure a lasting cure in about 65-80% and to eliminate the traditionally bad prognostic risk factors associated with less intensive treatment. Bone marrow transplantation (BMT) has a curative role in the minority who relapse particularly while on treatment. With few exceptions, most paediatric solid tumours are curable. Although the multimodal approach is responsible for the progress made, chemotherapy has emerged to play a dominant role. It has, in several tumours, obviated or reduced the need for radiotherapy and/or surgery. In Wilms' tumour and Hodgkin's disease, refinement of treatment is now in progress to reduce therapy-related morbidity while not sacrificing efficacy.
    Matched MeSH terms: Radiotherapy
  6. Bhoo-Pathy N, Balakrishnan N, See MH, Taib NA, Yip CH
    World J Surg, 2016 12;40(12):2913-2921.
    PMID: 27456497 DOI: 10.1007/s00268-016-3658-z
    BACKGROUND: Factors associated with surgery, adjuvant radiotherapy, and chemotherapy and whether there were missed opportunities for treatment in elderly patients were determined in an Asian setting.

    METHODS: All 5616 patients, diagnosed with breast cancer in University Malaya Medical Centre from 1999 to 2013 were included. In 945 elderly patients (aged 65 years and above), multivariable logistic regression was performed to identify factors associated with treatment, following adjustment for age, ethnicity, tumor, and other treatment characteristics. The impact of lack of treatment on survival of the elderly was assessed while accounting for comorbidities.

    RESULTS: One in five elderly patients had comorbidities. Compared to younger patients, the elderly had more favorable tumor characteristics, and received less loco-regional treatment and chemotherapy. Within stage I-IIIa elderly breast cancer patients, 10 % did not receive any surgery. These patients were older, more likely to be Malays, have comorbidities, and bigger tumors. In elderlies with indications for adjuvant radiotherapy, no irradiation (30 %) was associated with increasing age, comorbidity, and the absence of systemic therapy. Hormone therapy was optimal, but only 35 % of elderly women with ER negative tumors received chemotherapy. Compared to elderly women who received adequate treatment, those not receiving surgery (adjusted hazard ratio: 2.30, 95 %CI: 1.10-4.79), or radiotherapy (adjusted hazard ratio: 1.56, 95 %CI: 1.10-2.19), were associated with higher mortality. Less than 25 % of the survival discrepancy between elderly women receiving loco-regional treatment and no treatment were attributed to excess comorbidities in untreated patients.

    CONCLUSION: While the presence of comorbidities significantly influenced loco-regional treatment decisions in the elderly, it was only able to explain the lower survival rates in untreated patients up to a certain extent, suggesting missed opportunities for treatment.

    Matched MeSH terms: Radiotherapy, Adjuvant
  7. Zamaniah WI, Mastura MY, Phua CE, Adlinda A, Marniza S, Rozita AM
    Asian Pac J Cancer Prev, 2014;15(20):8987-92.
    PMID: 25374241
    BACKGROUND: The efficacy of concurrent chemoradiotherapy in the treatment of locally advanced cervical cancer is well established. We aimed to investigate the long-term efficacy of definitive concurrent chemoradiotherapy for cervical cancer in the University of Malaya Medical Centre.

    MATERIALS AND METHODS: A cohort of 60 patients with FIGO stage IB2-IVA cervical cancer who were treated with definitive concurrent chemoradiotherapy with cisplatin followed by intracavitary brachytherapy or external beam radiotherapy (EBRT) boost between November 2001 and May 2008 were analysed. Patients were initially treated with weekly intravenous cisplatin (40 mg/m2) concurrent with daily EBRT to pelvis of 45-50 Gy followed by low dose rate brachytherapy or EBRT boost to tumour. Local control rate, progression free survival, overall survival and treatment related toxicities graded by the RTOG criteria were evaluated.

    RESULTS: The mean age was 56. At the median follow-up of 72 months, the estimated 5-year progression-free survival (PFS) (median PFS 39 months) and the 5-year overall survival (OS) (median OS 51 months) were 48% and 50% respectively. The 5-year local control rate was 67.3%. Grade 3-4 late gastrointestinal and genitourinary toxicity occurred in 9.3% of patients.

    CONCLUSIONS: The 5-year PFS and the 5-year OS in this cohort were lower than in other institutions. More advanced stage at presentation, longer overall treatment time (OTT) of more than fifty-six days and lower total dose to point A were the potential factors contributing to a lower survival.

    Matched MeSH terms: Radiotherapy Dosage
  8. Lim NK, Aik OT, Meng LL, Htun TH, Razack AH
    J Coll Physicians Surg Pak, 2014 Mar;24 Suppl 1:S68-70.
    PMID: 24718014 DOI: 03.2014/JCPSP.S68S70
    Superior vena caval syndrome (SVCS) is a debilitating condition attributed to malignancy in more than 70% of cases. However, solitary head and neck metastases arising from renal cell carcinomas without evidence of disease elsewhere are rare. We report a case of renal cell carcinoma presenting as a rapidly growing right cervical lymph node with compression on the subclavian vein causing superior vena caval syndrome (SVCS). There was pulmonary embolism as well. Biopsy of the neck mass confirmed metastatic clear cell carcinoma with primary found in the (L) kidney. The patient had partial response to focussed radiotherapy to neck mass and Sunitinib (tyrosine kinase inhibitor) before succumbing to the disease.
    Matched MeSH terms: Radiotherapy
  9. Chee Ee Phua V, Loo WH, Yusof MM, Wan Ishak WZ, Tho LM, Ung NM
    Asian Pac J Cancer Prev, 2013;14(8):4567-70.
    PMID: 24083703
    BACKGROUND: Nasopharyngeal carcinoma (NPC) is the commonest radiocurable cancer in Malaysia. This study aimed to determine the treatment outcomes and late effects of radiotherapy for NPC patients treated in University Malaya Medical Centre (UMMC).

    MATERIALS AND METHODS: All newly diagnosed patients with NPC referred for treatment to the Oncology unit at UMMC from 2004-2008 were retrospectively analyzed. Treatment outcomes were 5 years overall survival (OS), disease free survival (DFS), cause-specific survival (CSS), loco- regional control (LRC) and radiotherapy-related late effects. The Kaplan-Meier method was used for survival analysis and differences in survival according to AJCC stage was compared using the log-rank test.

    RESULTS: A total of 176 patients with newly diagnosed NPC were treated in UMMC during this period. Late presentation was common, with 33.5% presenting with T3-4 disease, 84.7% with N1-3 disease and 75.6% with AJCC stage 3-4 disease. Radical RT was given to 162 patients with 22.7% having RT alone and 69.3% having CCRT. The stipulated OTT was 7 weeks and 72.2% managed to complete their RT within this time period. Neoadjuvant chemotherapy was given to 14.8% while adjuvant chemotherapy was administered to 16.5%. The 5 years OS was 51.6% with a median follow up of 58 months. The 5 years OS according to stage were 81.8% for stage I, 77.9% for stage II, 47.4% for stage III and 25.9% for stage IV. The 5 years overall CSS, DFS and LRC were 54.4%, 48.4% and 70.6%, respectively. RT related late effects were documented in 80.2%. The commonest was xerostomia (66.7%). Other documented late effects were hearing deficit (17.3%), visual deficit (3.1%), neck stiffness (3.1%) , dysphagia (3.4%), cranial nerve palsy (2.5%), pneumonitis (0.6%) and hypothyroidism (1.2%).

    CONCLUSIONS: The 5 years OS and LRC in this study are low compared to the latest studies especially those utilizing IMRT. Implementation of IMRT for NPC treatment should be strongly encouraged.

    Matched MeSH terms: Radiotherapy Dosage
  10. Shirbhate E, Patel P, Patel VK, Veerasamy R, Sharma PC, Rajak H
    Future Oncol, 2020 Oct;16(30):2457-2469.
    PMID: 32815411 DOI: 10.2217/fon-2020-0385
    HDAC inhibitors (HDACi) play an essential role in various cellular processes, such as differentiation and transcriptional regulation of key genes and cytostatic factors, cell cycle arrest and apoptosis that facilitates the targeting of epigenome of eukaryotic cells. In the majority of cancers, only a handful of patients receive optimal benefit from chemotherapeutics. Additionally, there is emerging interest in the use of HDACi to modulate the effects of ionizing radiations. The use of HDACi with radiotherapy, with the goal of reaching dissimilar, often distinct pathways or multiple biological targets, with the expectation of synergistic effects, reduced toxicity and diminished intrinsic and acquired resistance, conveys an approach of increasing interest. In this review, the clinical potential of HDACi in combination with radiotherapy is described as an efficient synergy for cancer treatment will be overviewed.
    Matched MeSH terms: Radiotherapy, Adjuvant
  11. Chiong E, Murphy DG, Akaza H, Buchan NC, Chung BH, Kanesvaran R, et al.
    BJU Int, 2019 01;123(1):22-34.
    PMID: 30019467 DOI: 10.1111/bju.14489
    OBJECTIVE: The Asia Pacific Advanced Prostate Cancer Consensus Conference (APAC APCCC 2018) brought together 20 experts from 15 APAC countries to discuss the real-world application of consensus statements from the second APCCC held in St Gallen in 2017 (APCCC 2017).

    FINDINGS: Differences in genetics, environment, lifestyle, diet and culture are all likely to influence the management of advanced prostate cancer in the APAC region when compared with the rest of the world. When considering the strong APCCC 2017 recommendation for the use of upfront docetaxel in metastatic castration-naïve prostate cancer, the panel noted possible increased toxicity in Asian men receiving docetaxel, which would affect this recommendation in the APAC region. Although androgen receptor-targeting agents appear to be well tolerated in Asian men with metastatic castration-resistant prostate cancer, access to these drugs is very limited for financial reasons across the region. The meeting highlighted that cost and access to contemporary treatments and technologies are key factors influencing therapeutic decision-making in the APAC region. Whilst lower cost/older treatments and technologies may be an option, issues of culture and patient or physician preference mean, these may not always be acceptable. Although generic products can reduce cost in some countries, costs may still be prohibitive for lower-income patients or communities. The panellists noted the opportunity for a coordinated approach across the APAC region to address issues of access and cost. Developments in technologies and treatments are presenting new opportunities for the diagnosis and treatment of advanced prostate cancer. Differences in genetics and epidemiology affect the side-effect profiles of some drugs and influence prescribing.

    CONCLUSIONS: As the field continues to evolve, collaboration across the APAC region will be important to facilitate relevant research and collection and appraisal of data relevant to APAC populations. In the meantime, the APAC APCCC 2018 meeting highlighted the critical importance of a multidisciplinary team-based approach to treatment planning and care, delivery of best-practice care by clinicians with appropriate expertise, and the importance of patient information and support for informed patient choice.

    Matched MeSH terms: Radiotherapy
  12. Ratnasingam J, Karim N, Paramasivam SS, Ibrahim L, Lim LL, Tan AT, et al.
    Pituitary, 2015 Aug;18(4):448-55.
    PMID: 25134488 DOI: 10.1007/s11102-014-0593-6
    PURPOSE: Radiation fields for nasopharyngeal cancer (NPC) include the base of skull, which places the hypothalamus and pituitary at risk of damage. We aimed to establish the prevalence, pattern and severity of hypothalamic pituitary (HP) dysfunction amongst NPC survivors.

    METHODS: We studied 50 patients (31 males) with mean age 57 ± 12.2 years who had treatment for NPC between 3 and 21 years (median 8 years) without pre-existing HP disorder from other causes. All patients had a baseline cortisol, fT4, TSH, LH, FSH, oestradiol/testosterone, prolactin and renal function. All patients underwent dynamic testing with insulin tolerance test to assess the somatotroph and corticotroph axes. Baseline blood measurements were used to assess thyrotroph, gonadotroph and lactotroph function.

    RESULTS: Hypopituitarism was present in 82% of patients, 30% single axis, 28% two axes, 18% three axes and 6% four axes deficiencies. Somatotroph deficiency was most common (78%) while corticotroph, gonadotroph and thyrotroph deficiencies were noted in 40% (4 complete/16 partial), 22 and 4% of the patients respectively. Hyperprolactinaemia was present in 30% of patients. The development of HP dysfunction was significantly associated with the time elapsed from irradiation, OR 2.5 (1.2, 5.3), p = 0.02, for every 2 years post treatment. The use of concurrent chemo-irradiation (CCRT) compared to those who had radiotherapy alone was also significantly associated with HP dysfunction, OR 14.5 (2.4, 87.7), p < 0.01.

    CONCLUSION: Despite low awareness and detection rates, HP dysfunction post-NPC irradiation is common. Use of CCRT may augment time related pituitary damage. As these endocrinopathies result in significant morbidity and mortality we recommend periodic assessment of pituitary function amongst NPC survivors.

    Matched MeSH terms: Radiotherapy; Chemoradiotherapy
  13. Lee WC, Yusof MM, Lau FN, Phua VC
    Asian Pac J Cancer Prev, 2013;14(6):3941-4.
    PMID: 23886211
    BACKGROUND: The use of preoperative chemoirradiation is the commonest treatment strategy employed in Malaysia for locally advanced rectal cancer. We need to determine the local control and survival rates for comparison with established rates in the literature.

    MATERIALS AND METHODS: This retrospective study analyzed all newly diagnosed patients with rectal adenocarcinoma who underwent long course preoperative radiotherapy (RT) at the Department of Radiotherapy and Oncology, Kuala Lumpur Hospital (HKL) between 1st January 2004 and 31st December 2010. The aim of the study was to determine the radiological response post radiotherapy, pathological response including circumferential resection margin (CRM) status, 3 years local control, 3 years overall survival (OS) and 3 years disease free survival (DFS). Statistical analysis was performed using the SPSS software. Kaplan-Meier and log rank analysis were used to determine survival outcomes.

    RESULTS: A total of 507 patients with rectal cancer underwent RT at HKL. Sixty seven who underwent long course preoperative RT were eligible for this study. The median age at diagnosis was 60 years old with a range of 26-78 years. The median tumour location was 6 cm from the anal verge. Most patients had suspicion of mesorectum involvement (95.5%) while 28.4% of patients had enlarged pelvic nodes on staging CT scan. All patients underwent preoperative chemo-irradiation except for five who had preoperative RT alone. Only 38 patients underwent definitive surgery (56.7%). Five patients were deemed to be inoperable radiologically and 3 patients were found to have unresectable disease intraoperatively. The remaining 21 patients defaulted surgery (31.3%). The median time from completion of RT to surgery was 8 weeks (range 5.6 to 29.4 weeks). Fifteen patients (39.5%) had surgery more than 8 weeks after completion of RT. Complete pathological response was noted in 4 patients (10.5%). The pathological CRM positive rate after RT was 18.4%. With a median follow-up of 38.8 months, the 3 year local control rate was 67%. The 3 years rate for CRM positive (<2 mm), CRM clear (>2 mm) and pCR groups were 0%, 88.1% and 100% respectively (p-value of 0.007). The 3 year OS and DFS were 57.3% and 44.8% respectively.

    CONCLUSIONS: In conclusion, the approach of long course preoperative chemoirradiation for rectal cancer needs to be re-examined in our local setting. The high rate of local recurrence is worrying and is mainly due to patient defaulting post-preoperative chemoirradiation or delayed definitive surgery.
    Matched MeSH terms: Radiotherapy Dosage
  14. Singam P, Ho C, Hong GE, Mohd A, Tamil AM, Cheok LB, et al.
    Asian Pac J Cancer Prev, 2010;11(2):503-6.
    PMID: 20843141
    Renal cancer is rare and its incidence is 1.9 per 100,000 in the Malaysian population, which consists of three major ethnic groups (Malay, Chinese and Indians). A retrospective study was her conducted to identify clinical characteristics and ethnic background influences on presentation. The study included all renal cancer patients from a single medical institution over ten years, with a total of 75 cases. Seventy-three patients underwent surgery while 2 received only radiotherapy or chemotherapy. The male to female ratio was 2.75:1. Incidence was equal among the Malay (49.3%) and Chinese ethnic groups (45.3%). Mean age of patients were 57.1 (18-93) years old. There were 26 (37.4%) patients with Stage I disease, 14 (18.7%) at Stage II, 23 (30.7%) at Stage III and 12 (16%) at Stage IV. The Chinese race presented at mean older age (p= 0.02) and later stage of disease (p= 0.046). Patients above 40 years old had more advanced stage disease (p= 0.023). Tumour histology were clear cell (72%), urothelial cell (13.3%), sarcomatoid cell and nephroblastoma each contributed 2.7%. The mean tumour size was 8.1 (2-20) cm. There was substantial agreement between the pre and post operative staging (kappa 0.691). In conclusion we observed significant influences of age and race in the clinical presentation of renal cancer in our institution based population. There was larger male to female ratio and mean tumour size as compared to previous epidemiology studies.
    Matched MeSH terms: Radiotherapy Dosage
  15. Alcantara VS, Lim GH, Lim SH, Sultana R, Lee JA
    J Surg Oncol, 2017 Apr;115(5):523-537.
    PMID: 28168712 DOI: 10.1002/jso.24559
    BACKGROUND AND OBJECTIVES: Triple negative breast cancer (TNBC) carries a worse prognosis compared to the other subtypes. There have been conflicting studies that race may impact the prognosis of TNBC patients. We aim to determine the incidence and prognosis of TNBC among the different ethnic races in Singapore, and to determine its associated risk factors for prognosis.

    METHODS: Patients diagnosed with invasive breast cancer (BC) from 2005 to 2013 at our tertiary institution were included and divided according to race and subtypes. Demographic and clinical information of non-metastatic TNBC patients were analyzed. Log-rank test, univariate and multivariate Cox proportional hazard regression models were used to find associated risk factors related with overall survival (OS) and disease-free survival (DFS).

    RESULTS: Among 1227 BC patients, 129 (10.5%) had TNBC. TNBC patients had the worst OS (P: 0.0005) and DFS (P: 0.0016) among the subtypes. However, variations in race did not have any difference in OS or DFS among TNBC patients. Axillary lymph node involvement, invasive lobular histology, larger tumor size, and the presence of lymphovascular invasion (LVI) were factors associated with both poor DFS and OS among TNBC patients.

    CONCLUSIONS: Racial variation did not have any impact on the prognosis of the TNBC.

    Matched MeSH terms: Radiotherapy, Adjuvant
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