Displaying publications 1 - 20 of 57 in total

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  1. Saad M, Chong FLT, Bustam AZ, Ho GF, Malik RA, Ishak WZW, et al.
    Indian J Cancer, 2019 1 4;55(2):157-161.
    PMID: 30604728 DOI: 10.4103/ijc.IJC_581_17
    BACKGROUND: Scalp cooling has been shown in several studies to be an effective method in preventing chemotherapy-induced alopecia (CIA). Data on the use of scalp cooling in Asian countries are limited, and evidence for its use and efficacy among our patients are not available.

    OBJECTIVE: The aim of this study was to assess the effectiveness and tolerability of scalp cooling among breast cancer patients in our study population.

    METHODS: Consecutive breast cancer patients receiving FE75C, FE100C, FE100C-D, docetaxel75 or docetaxel, and cyclophosphamide (TC) at our treatment center were recruited and allocated to the treatment (scalp cooling, DigniCapTM system) or control group in this prospective nonrandomized controlled study. The assessment of alopecia was carried out using the World Health Organization grading system and clinical photographs.

    RESULTS: Seventy patients were recruited, but only 25 completed the study and were evaluable for analysis. Five of 12 patients (42%) in the scalp cooling group managed to preserve hair. Two of three patients who received FE75C and TC regimens had minimal hair loss. All patients treated with FE100C had severe hair loss. Half of all patients who received scalp cooling throughout chemotherapy rated the treatment as reasonably well tolerated. The most common reason for discontinuing scalp cooling was intolerance to its side effects.

    CONCLUSION: Scalp cooling is potentially effective in reducing CIA caused by docetaxel, TC, and FE75C chemotherapy regimen. However, it was not well tolerated by our study population. The dropout rate was high, and this needs to be taken into consideration when pursuing further trials in a similar setting.

  2. Chai CS, Liam CK, Poh ME, Ong DB, Pang YK, Cheah PL, et al.
    Cancer Manag Res, 2020;12:5439-5450.
    PMID: 32753961 DOI: 10.2147/CMAR.S253760
    BACKGROUND: This study aims to determine the predictors of acquired exon 20 T790M mutation in advanced non-small cell lung cancer (NSCLC) patients harbouring sensitizing epidermal growth factor receptor (EGFR) mutation following the failure of first- or second-generation EGFR-tyrosine kinase inhibitor (TKI).

    METHODS: This is a retrospective observational study of NSCLC patients with sensitising EGFR mutation experiencing disease progression (PD) whilst on first- or second-generation EGFR-TKIs with subsequent investigations to detect acquired T790M mutation at the University of Malaya Medical Centre from 1st January 2015 to 31st December 2017.

    RESULTS: A total of 87 patients were included. Upon PD, acquired T790M mutation was found in 55 (63.2%) patients and was significantly more common in patients who achieved partial response (PR) whilst on the EGFR-TKIs (p = 0.008) or had new lung metastasis upon PD (p = 0.048). It was less frequent in patients who developed new symptomatic brain lesions (p = 0.021). Patients with exon 19 deletion were more likely to acquire T790M mutation compared to those with exon 21 L858R point mutation (p = 0.077). Multivariate analysis revealed PR whilst on EGFR-TKI treatment was an independent predictor of acquiring T790M mutation (p = 0.021), whereas development of new symptomatic brain lesions (p = 0.034) or new lymph node metastases (p = 0.038) upon PD was independently against acquiring T790M mutation. Patients with exon 19 deletion were more likely to acquire T790M mutation compared to those with exon 21 L858R point mutation (odds ratio: 2.3, 95% confidence interval: 0.84-6.25, p = 0.104).

    CONCLUSION: The best tumour response of PR to first- or second-generation EGFR-TKI treatment independently predicts acquired T790M mutation. Patients with exon 19 deletion are likely to acquire T790M mutation. This would prove useful for clinicians to prognosticate and plan subsequent treatments for patients with advanced NSCLC harbouring EGFR mutations.

  3. Wong HS, Subramaniam S, Alias Z, Taib NA, Ho GF, Ng CH, et al.
    Medicine (Baltimore), 2015 Feb;94(8):e593.
    PMID: 25715267 DOI: 10.1097/MD.0000000000000593
    Web-based prognostication tools may provide a simple and economically feasible option to aid prognostication and selection of chemotherapy in early breast cancers. We validated PREDICT, a free online breast cancer prognostication and treatment benefit tool, in a resource-limited setting. All 1480 patients who underwent complete surgical treatment for stages I to III breast cancer from 1998 to 2006 were identified from the prospective breast cancer registry of University Malaya Medical Centre, Kuala Lumpur, Malaysia. Calibration was evaluated by comparing the model-predicted overall survival (OS) with patients' actual OS. Model discrimination was tested using receiver-operating characteristic (ROC) analysis. Median age at diagnosis was 50 years. The median tumor size at presentation was 3 cm and 54% of patients had lymph node-negative disease. About 55% of women had estrogen receptor-positive breast cancer. Overall, the model-predicted 5 and 10-year OS was 86.3% and 77.5%, respectively, whereas the observed 5 and 10-year OS was 87.6% (difference: -1.3%) and 74.2% (difference: 3.3%), respectively; P values for goodness-of-fit test were 0.18 and 0.12, respectively. The program was accurate in most subgroups of patients, but significantly overestimated survival in patients aged <40 years, and in those receiving neoadjuvant chemotherapy. PREDICT performed well in terms of discrimination; areas under ROC curve were 0.78 (95% confidence interval [CI]: 0.74-0.81) and 0.73 (95% CI: 0.68-0.78) for 5 and 10-year OS, respectively. Based on its accurate performance in this study, PREDICT may be clinically useful in prognosticating women with breast cancer and personalizing breast cancer treatment in resource-limited settings.
  4. Wong LP, Kong YC, Bhoo-Pathy NT, Subramaniam S, Bustamam RS, Taib NA, et al.
    JCO Oncol Pract, 2021 04;17(4):e548-e555.
    PMID: 32986532 DOI: 10.1200/JOP.20.00002
    PURPOSE: The breaking of news of a cancer diagnosis is an important milestone in a patient's cancer journey. We explored the emotional experiences of patients with cancer during the breaking of news of a cancer diagnosis and the arising needs in a multiethnic Asian setting with limited supportive cancer care services.

    METHODS: Twenty focus group discussions were conducted with 102 Asian patients with cancer from diverse sociodemographic backgrounds. Thematic analysis was performed.

    RESULTS: While most participants, especially younger patients with young children, experienced intense emotional distress upon receiving a cancer diagnosis, those with a family history of cancer were relatively calm and resigned. Nonetheless, the prior negative experience with cancer in the family made affected participants with a family history less eager to seek cancer treatment and less hopeful for a cure. Although a majority viewed the presence of family members during the breaking of bad news as important, a minority opted to face it alone to lessen the emotional impact on their family members. Difficulties disclosing the news of a cancer diagnosis to loved ones also emerged as an important need. Sensitive and empathetic patient-physician communication during the breaking of news of a cancer diagnosis was stressed as paramount.

    CONCLUSION: A patient-centered communication approach needs to be developed to reduce the emotional distress to patients and their families after the breaking of bad news of a cancer diagnosis. This is expected to positively affect the patients' subsequent coping skills and attitudes toward cancer, which may improve adherence to cancer therapy.

  5. Rajah HDA, Chan CMH, Kong YC, Wong LP, Bustaman RS, Ho GF, et al.
    Support Care Cancer, 2021 Oct;29(10):5811-5819.
    PMID: 33742239 DOI: 10.1007/s00520-021-06148-2
    INTRODUCTION: Delivery of supportive cancer care is often deemed a low priority in resource-limited settings. We aimed to explore the sources of emotional distress, the related support and the unmet needs of cancer survivors in Malaysia, where cancer survivorship services are presently limited.

    METHOD: Twenty focus group discussions were conducted with 102 cancer patients from diverse ethnic and socioeconomic backgrounds. Thematic analyses were performed.

    RESULTS: Patient narratives suggested that emotional distress arose from direct and indirect stressors. Direct stressors comprised physical and cognitive side effects of cancer surgery and therapies, and fear of recurrence. Indirect stressors included worry over dependent family members, financial distress following cancer, working with cancer and lack of practical support at home. Distress from altered physical appearances, fear of recurrence and lack of practical support were mainly raised by women, implying that men and women may have disproportionate emotional needs. Emotional support largely came from informal sources including self, family, friends and religion. While formal emotional support from professional counsellors and cancer support groups was acknowledged as important, it appeared to be largely lacking. Unmet needs in coping with fear of recurrence, financial distress, workplace discrimination and household chores were particularly highlighted.

    CONCLUSION: The unmet needs revealed in this study provide insights to initiate actionable changes to improve the emotional wellbeing of people living with cancer in settings where cancer survivorship services are still in its infancy.

  6. Fnu N, Kuan WC, Kong YC, Bustamam RS, Wong LP, Subramaniam S, et al.
    Ecancermedicalscience, 2022;16:1449.
    PMID: 36405936 DOI: 10.3332/ecancer.2022.1449
    Background: Evidence on the financial experiences of cancer survivors living in settings with pluralistic health systems remains limited. We explored the out-of-pocket costs, the resulting financial impact and the coping strategies adopted by cancer survivors in Malaysia, a middle-income country with a government-led tax-funded public health sector, and a predominantly for-profit private health sector.

    Methods: Data were derived from 20 focus group discussions that were conducted in five public and private Malaysian hospitals, which included 102 adults with breast, cervical, colorectal or prostate cancers. The discussions were segregated by type of healthcare setting and gender. Thematic analysis was performed.

    Results: Five major themes related to cancer costs emerged: 1) cancer therapies and imaging services, 2) supportive care, 3) complementary therapies, 4) non-medical costs and 5) loss of household income. Narratives on out-of-pocket medical costs varied not only by type of healthcare setting, clinical factors and socioeconomic backgrounds, but also by private health insurance ownership. Non-health costs (e.g. transportation, food) and loss of income were nonetheless recurring themes. Coping mechanisms that were raised included changing of cancer treatment decisions, continuing work despite ill health and seeking financial assistance from third parties. Unmet needs in coping with financial distress were especially glaring among the women.

    Conclusion: The long-term costs of cancer (medications, cancer surveillance, supportive care, complementary medicine) should not be overlooked even in settings where there is access to highly subsidised cancer care. In such settings, patients may also have unmet needs related to non-health costs of cancer and loss of income.

  7. Kong YC, Rauf N, Subramaniam S, Bustamam RS, Wong LP, Ho GF, et al.
    J Cancer Surviv, 2021 10;15(5):706-712.
    PMID: 33094415 DOI: 10.1007/s11764-020-00962-z
    PURPOSE: A considerable proportion of individuals who are diagnosed with cancer are at a working age. We aimed to gain an in-depth understanding of the challenges, and arising needs related to working after cancer in a setting with limited employment protection policies.

    METHODS: Focus group discussions were conducted with cancer patients who were diagnosed at least 1 year prior to recruitment, and either had paid work, were self-employed, currently unemployed, or currently retired (N = 66).

    RESULTS: Three main themes were identified: (1) loss of income: While some participants were entitled for a 1-year cancer-specific sick leave, many other participants recounted having insufficient paid sick leave, forcing them to take prolonged unpaid leave to complete treatment; (2) dealing with side effects of cancer and its treatment: The need for workplace accommodations was highlighted including flexible working hours, lighter workloads, and dedicated rest areas to enable patients to cope better; (3) Discrimination and stigma at workplace: Some participants mentioned being passed over on a promotion, getting demoted, or being forced to resign once their cancer diagnosis was disclosed, highlighting an urgent need to destigmatize cancer in the workplace.

    CONCLUSION: In settings with limited employment protection policies, a cancer diagnosis severely impacts the working experiences of patients, leading to financial loss. Urgent interventions and legislative reforms are needed in these settings to address the unmet employment needs of cancer survivors.

    IMPLICATIONS FOR CANCER SURVIVORS: This study may facilitate planning of local solutions to fulfill the unmet employment needs following cancer, such as return-to-work navigation services.

  8. Golkhalkhali B, Rajandram R, Paliany AS, Ho GF, Wan Ishak WZ, Johari CS, et al.
    Asia Pac J Clin Oncol, 2018 Jun;14(3):179-191.
    PMID: 28857425 DOI: 10.1111/ajco.12758
    AIM: Colorectal cancer patients on chemotherapy usually have elevated levels of inflammatory markers and experience numerous side effects from chemotherapy thereby leading to poor quality of life. Omega-3 fatty acid and microbial cell preparation (MCP) have been known to provide significant benefits in patients on chemotherapy. The aim of this study was to determine the effect of supplementation of omega-3 fatty acid and MCP in quality of life, chemotherapy side effects and inflammatory markers in colorectal cancer patients on chemotherapy.

    METHODS: A double-blind randomized study was carried out with 140 colorectal cancer patients on chemotherapy. Subjects were separated into two groups to receive either placebo or MCP [30 billion colony-forming unit (CFUs) per sachet] at a dose of two sachets daily for 4 weeks, and omega-3 fatty acid at a dose of 2 g daily for 8 weeks. Outcomes measured were quality of life, side effects of chemotherapy and levels of inflammatory markers such as interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α) and C-reactive protein.

    RESULTS: The supplementation with MCP and omega-3 fatty acid improved the overall quality of life and alleviated certain side effects of chemotherapy. The supplementation with MCP and omega-3 fatty acid also managed to reduce the level of IL-6 (P = 0.002). There was a significant rise in the placebo group's serum TNF-α (P = 0.048) and IL-6 (P = 0.004).

    CONCLUSION: The combined supplementation with MCP and omega-3 fatty acid may improve quality of life, reduce certain inflammatory biomarkers and relieve certain side effects of chemotherapy in colorectal patients on chemotherapy.

  9. Lopes G, Stern MC, Temin S, Sharara AI, Cervantes A, Costas-Chavarri A, et al.
    J Glob Oncol, 2019 02;5:1-22.
    PMID: 30802159 DOI: 10.1200/JGO.18.00213
    PURPOSE: To provide resource-stratified, evidence-based recommendations on the early detection of colorectal cancer in four tiers to clinicians, patients, and caregivers.

    METHODS: American Society of Clinical Oncology convened a multidisciplinary, multinational panel of medical oncology, surgical oncology, surgery, gastroenterology, health technology assessment, cancer epidemiology, pathology, radiology, radiation oncology, and patient advocacy experts. The Expert Panel reviewed existing guidelines and conducted a modified ADAPTE process and a formal consensus-based process with additional experts (Consensus Ratings Group) for two round(s) of formal ratings.

    RESULTS: Existing sets of guidelines from eight guideline developers were identified and reviewed; adapted recommendations form the evidence base. These guidelines, along with cost-effectiveness analyses, provided evidence to inform the formal consensus process, which resulted in agreement of 75% or more.

    CONCLUSION: In nonmaximal settings, for people who are asymptomatic, are ages 50 to 75 years, have no family history of colorectal cancer, are at average risk, and are in settings with high incidences of colorectal cancer, the following screening options are recommended: guaiac fecal occult blood test and fecal immunochemical testing (basic), flexible sigmoidoscopy (add option in limited), and colonoscopy (add option in enhanced). Optimal reflex testing strategy for persons with positive screens is as follows: endoscopy; if not available, barium enema (basic or limited). Management of polyps in enhanced is as follows: colonoscopy, polypectomy; if not suitable, then surgical resection. For workup and diagnosis of people with symptoms, physical exam with digital rectal examination, double contrast barium enema (only in basic and limited); colonoscopy; flexible sigmoidoscopy with biopsy (if contraindication to latter) or computed tomography colonography if contraindications to two endoscopies (enhanced only).

  10. Bhoo-Pathy N, Verkooijen HM, Wong FY, Pignol JP, Kwong A, Tan EY, et al.
    Int J Cancer, 2015 Nov 15;137(10):2504-12.
    PMID: 26018878 DOI: 10.1002/ijc.29617
    The value of adjuvant radiotherapy in triple-negative breast cancer (TNBC) is currently debated. We assessed the association between adjuvant radiotherapy and survival in a large cohort of Asian women with TNBC. Women diagnosed with TNBC from 2006 to 2011 in five Asian centers (N = 1,138) were included. Survival between patients receiving mastectomy only, breast-conserving therapy (BCT, lumpectomy and adjuvant radiotherapy) and mastectomy with radiotherapy were compared, and adjusted for demography, tumor characteristics and chemotherapy types. Median age at diagnosis was 53 years (range: 23-96 years). Median tumor size at diagnosis was 2.5 cm and most patients had lymph node-negative disease. The majority of patients received adjuvant chemotherapy (n = 861, 76%) comprising predominantly anthracycline-based regimes. In 775 women with T1-2, N0-1, M0 TNBCs, 5-year relative survival ratio (RSR) was highest in patients undergoing mastectomy only (94.7%, 95% CI: 88.8-98.8%), followed by BCT (90.8%, 95% CI: 85.0-94.7%), and mastectomy with radiotherapy (82.3%, 95% CI: 73.4-88.1%). The adjusted risks of mortality between the three groups were not significantly different. In 363 patients with T3-4, N2-3, M0 TNBCs, BCT was associated with highest 5-year RSR (94.1%, 95% CI: 81.3-99.4%), followed by mastectomy with radiotherapy (62.7%, 95% CI: 54.3-70.1%), and mastectomy only (58.6%, 95% CI: 43.5-71.6%). Following multivariable adjustment, BCT and mastectomy with radiotherapy remained significantly associated with lower mortality risk compared to mastectomy only. Overall, adjuvant radiotherapy was associated with higher survival in women aged <40 years, but not in older women. Adjuvant radiotherapy appears to be independently associated with a survival gain in locally advanced as well as in very young TNBC.
  11. Chen LT, Martinelli E, Cheng AL, Pentheroudakis G, Qin S, Bhattacharyya GS, et al.
    Ann Oncol, 2020 03;31(3):334-351.
    PMID: 32067677 DOI: 10.1016/j.annonc.2019.12.001
    The most recent version of the European Society for Medical Oncology (ESMO) Clinical Practice Guidelines for the diagnosis, treatment and follow-up of hepatocellular carcinoma (HCC) was published in 2018, and covered the diagnosis, management, treatment and follow-up of early, intermediate and advanced disease. At the ESMO Asia Meeting in November 2018 it was decided by both the ESMO and the Taiwan Oncology Society (TOS) to convene a special guidelines meeting immediately after the Taiwan Joint Cancer Conference (TJCC) in May 2019 in Taipei. The aim was to adapt the ESMO 2018 guidelines to take into account both the ethnic and the geographic differences in practice associated with the treatment of HCC in Asian patients. These guidelines represent the consensus opinions reached by experts in the treatment of patients with intermediate and advanced/relapsed HCC representing the oncology societies of Taiwan (TOS), China (CSCO), India (ISMPO) Japan (JSMO), Korea (KSMO), Malaysia (MOS) and Singapore (SSO). The voting was based on scientific evidence, and was independent of the current treatment practices, the drug availability and reimbursement situations in the individual participating Asian countries.
  12. Chopra S, Gupta A, Aoyama H, Wu HG, Mahmood H, Tharavichitkul E, et al.
    JCO Glob Oncol, 2023 Jun;9:e2300002.
    PMID: 37384859 DOI: 10.1200/GO.23.00002
    PURPOSE: This survey was conducted to assess the current research practices among the 14 members of the Federation of Asian Organizations for Radiation Oncology (FARO) committee, to inform measures for research capacity building in these nations.

    MATERIALS AND METHODS: A 19-item electronic survey was sent to two research committee members from the 14 representative national radiation oncology organizations (N = 28) that are a part of FARO.

    RESULTS: Thirteen of the 14 member organizations (93%) and 20 of 28 members (71.5%) responded to the questionnaire. Only 50% of the members stated that an active research environment existed in their country. Retrospective audits (80%) and observational studies (75%) were the most common type of research conducted in these centers. Lack of time (80%), lack of funding (75%), and limited training in research methodology (40%) were cited as the most common hindrances in conducting research. To promote research initiatives in the collaborative setting, 95% of the members agreed to the creation of site-specific groups, with head and neck (45%) and gynecological cancers (25%) being the most preferred disease sites. Projects focused on advanced external beam radiotherapy implementation (40%), and cost-effectiveness studies (35%) were cited as some of the potential areas for future collaboration. On the basis of the survey results, after result discussion and the FARO officers meeting, an action plan for the research committee has been created.

    CONCLUSION: The results from the survey and the initial policy structure may allow facilitation of radiation oncology research in the collaborative setting. Centralization of research activities, funding support, and research-directed training are underway to help foster a successful research environment in the FARO region.

  13. Lim GC, Aina EN, Cheah SK, Ismail F, Ho GF, Tho LM, et al.
    BMC Cancer, 2014;14:212.
    PMID: 24650245 DOI: 10.1186/1471-2407-14-212
    BACKGROUND: Cancer is the leading cause of deaths in the world. A widening disparity in cancer burden has emerged between high income and low-middle income countries. Closing this cancer divide is an ethical imperative but there is a dearth of data on cancer services from developing countries.
    METHODS: This was a multi-center, retrospective observational cohort study which enrolled women with breast cancer (BC) attending 8 participating cancer centers in Malaysia in 2011. All patients were followed up for 12 months from diagnosis to determine their access to therapies. We assess care performance using measures developed by Quality Oncology Practice Initiative, American Society of Clinical Oncology/National Comprehensive Cancer Network, American College of Surgeons' National Accreditation Program for Breast Centers as well as our local guideline.
    RESULTS: Seven hundred and fifty seven patients were included in the study; they represent about 20% of incident BC in Malaysia. Performance results were mixed. Late presentation was 40%. Access to diagnostic and breast surgery services were timely; the interval from presentation to tissue diagnosis was short (median = 9 days), and all who needed surgery could receive it with only a short wait (median = 11 days). Performance of radiation, chemo and hormonal therapy services showed that about 75 to 80% of patients could access these treatments timely, and those who could not were because they sought alternative treatment or they refused treatment. Access to Trastuzumab was limited to only 19% of eligible patients.
    CONCLUSIONS: These performance results are probably acceptable for a middle income country though far below the 95% or higher adherence rates routinely reported by centres in developed countries. High cost trastuzumab was inaccessible to this population without public funding support.
  14. Qin S, Chen Z, Fang W, Ren Z, Xu R, Ryoo BY, et al.
    J Clin Oncol, 2023 Mar 01;41(7):1434-1443.
    PMID: 36455168 DOI: 10.1200/JCO.22.00620
    PURPOSE: We evaluated the efficacy and safety of pembrolizumab in patients from Asia with previously treated advanced hepatocellular carcinoma (HCC).

    METHODS: In a double-blind, phase III trial, 453 patients with advanced HCC and progression during or after treatment with or intolerance to sorafenib or oxaliplatin-based chemotherapy were randomly assigned in a 2:1 ratio to receive pembrolizumab (200 mg) or placebo once every 3 weeks for ≤ 35 cycles plus best supportive care. The primary end point was overall survival (one-sided significance threshold, P = .0193 [final analysis]). Secondary end points included progression-free survival (PFS) and objective response rate (ORR; one-sided significance threshold, P = .0134 and .0091, respectively [second interim analysis]; RECIST version 1.1, by blinded independent central review).

    RESULTS: Median overall survival was longer in the pembrolizumab group than in the placebo group (14.6 v 13.0 months; hazard ratio for death, 0.79; 95% CI, 0.63 to 0.99; P = .0180). Median PFS was also longer in the pembrolizumab group than in the placebo group (2.6 v 2.3 months; hazard ratio for progression or death, 0.74; 95% CI, 0.60 to 0.92; P = .0032). ORR was greater in the pembrolizumab group (12.7% [95% CI, 9.1 to 17.0]) than in the placebo group (1.3% [95% CI, 0.2 to 4.6]; P < .0001). Treatment-related adverse events occurred in 66.9% of patients (grade 3, 12.0%; grade 4, 1.3%; grade 5, 1.0%) in the pembrolizumab group and 49.7% of patients (grade 3, 5.9%; grade 4, 0%; grade 5, 0%) in the placebo group.

    CONCLUSION: In patients from Asia with previously treated advanced HCC, pembrolizumab significantly prolonged overall survival and PFS, and ORR was greater versus placebo.

  15. Jong WL, Ung NM, Wong JH, Ng KH, Wan Ishak WZ, Abdul Malik R, et al.
    Phys Med, 2016 Nov;32(11):1466-1474.
    PMID: 27842982 DOI: 10.1016/j.ejmp.2016.10.022
    The purpose of this study is to measure patient skin dose in tangential breast radiotherapy. Treatment planning dose calculation algorithm such as Pencil Beam Convolution (PBC) and in vivo dosimetry techniques such as radiochromic film can be used to accurately monitor radiation doses at tissue depths, but they are inaccurate for skin dose measurement. A MOSFET-based (MOSkin) detector was used to measure skin dose in this study. Tangential breast radiotherapies ("bolus" and "no bolus") were simulated on an anthropomorphic phantom and the skin doses were measured. Skin doses were also measured in 13 patients undergoing each of the techniques. In the patient study, the EBT2 measurements and PBC calculation tended to over-estimate the skin dose compared with the MOSkin detector (p<0.05) in the "no bolus radiotherapy". No significant differences were observed in the "bolus radiotherapy" (p>0.05). The results from patients were similar to that of the phantom study. This shows that the EBT2 measurement and PBC calculation, while able to predict accurate doses at tissue depths, are inaccurate in predicting doses at build-up regions. The clinical application of the MOSkin detectors showed that the average total skin doses received by patients were 1662±129cGy (medial) and 1893±199cGy (lateral) during "no bolus radiotherapy". The average total skin doses were 4030±72cGy (medial) and 4004±91cGy (lateral) for "bolus radiotherapy". In some cases, patient skin doses were shown to exceed the dose toxicity level for skin erythema. Hence, a suitable device for in vivo dosimetry is necessary to accurately determine skin dose.
  16. Lee DW, Ho GF
    Gynecol Oncol Rep, 2020 Nov;34:100626.
    PMID: 32953960 DOI: 10.1016/j.gore.2020.100626
    Serous ovarian cancers are typically high grade and recur within a short interval. The currently available therapeutic options provide a relatively low response rate and the progress-free survival are short-lived. There is emerging data that CDK4/6 may be effective in metastatic ovarian cancer. This case describes the use of palbociclib after multiple lines of cytotoxic chemotherapy and hormonal therapy. At 30 months upon commencement of palbociclib and letrozole, this patient continues to respond to the treatment radiologically and in the suppression of CA125.
  17. Cheong EV, Ho GF
    Clin Case Rep, 2021 Apr;9(4):2264-2268.
    PMID: 33936677 DOI: 10.1002/ccr3.4009
    The development of resistance to trastuzumab in HER2-positive gastroesophageal cancer remains a problem. The use of dual HER2 blockade to overcome this is a therapeutic strategy that should be researched more extensively.
  18. Poh ME, Chai CS, Liam CK, Ho GF, Pang YK, Hasbullah HH, et al.
    Transl Lung Cancer Res, 2024 Feb 29;13(2):307-320.
    PMID: 38496703 DOI: 10.21037/tlcr-23-691
    BACKGROUND: Afatinib can be started at a dose lower than the recommended starting dose of 40 mg/day for the treatment of epidermal growth factor receptor (EGFR)-mutant non-small cell lung cancer (NSCLC), however treatment outcomes in real-world clinical practice remains unclear.

    METHODS: This retrospective study of patients with NSCLC from 18 major hospitals (public, private or university teaching hospitals) enrolled in Malaysia's National Cardiovascular and Thoracic Surgical Database (NCTSD) assessed the efficacy of lower doses of afatinib on treatment outcomes in a real-world clinical practice. Data on clinical characteristics, afatinib dosing, and treatment outcomes for patients included in NCTSD from 1st January 2015 to 31st December 2020 were analyzed.

    RESULTS: Of the 133 patients studied, 94.7% had adenocarcinoma. Majority of the patients (60.9%) had EGFR exon 19 deletion and 23.3% had EGFR exon 21 L858R point mutation. The mean age of patients was 64.1 years and majority (83.5%) had Eastern Cooperative Oncology Group performance status of 2-4 at diagnosis. The most common afatinib starting doses were 40 mg (37.6%), 30 mg (29.3%), and 20 mg (26.3%) once daily (OD), respectively. A quarter of patients had dose reduction (23.3%) due to side effects or cost constraints. Majority of the patients had partial response to afatinib (63.2%) whilst 2.3% had complete response. Interestingly, the objective response rate was significantly higher (72.3%) with afatinib OD doses of less than 40 mg compared to 40 mg (54.0%) (P=0.032). Patients on lower doses of afatinib were two times more likely to achieve an objective response [odds ratio =2.64; 95% confidence interval (CI): 1.20-5.83; P=0.016]. These patients had a numerically but not statistically longer median time to treatment failure (TTF). Median TTF (95% CI) for the overall cohort was 12.4 (10.02-14.78) months. Median overall survival (95% CI) was 21.30 (15.86-26.75) months.

    CONCLUSIONS: Lower afatinib doses (<40 mg OD) could be equally effective as standard dose in patients with EGFR-mutant advanced NSCLC and may be more suited to Asian patients, minimizing side effects that may occur at higher dosages of afatinib leading to dose interruptions and affecting treatment outcomes.

  19. Cheng AL, Li J, Vaid AK, Ma BB, Teh C, Ahn JB, et al.
    Clin Colorectal Cancer, 2014 Sep;13(3):145-55.
    PMID: 25209093 DOI: 10.1016/j.clcc.2014.06.004
    Colorectal cancer (CRC) is among the most common cancers worldwide, but marked epidemiological differences exist between Asian and non-Asian populations. Hence, a consensus meeting was held in Hong Kong in December 2012 to develop Asia-specific guidelines for the management of metastatic CRC (mCRC). A multidisciplinary expert panel, consisting of 23 participants from 10 Asian and 2 European countries, discussed current guidelines for colon or rectal cancer and developed recommendations for adapting these guidelines to Asian clinical practice. Participants agreed that mCRC management in Asia largely follows international guidelines, but they proposed a number of recommendations based on regional 'real-world' experience. In general, participants agreed that 5-fluorouracil (5-FU) infusion regimens in doublets can be substituted with UFT (capecitabine, tegafur-uracil) and S1 (tegafur, 5-chloro-2,4-dihydroxypyridine and oxonic acid), and that the monoclonal antibodies cetuximab and panitumumab are recommended for KRAS wild type tumors. For KRAS mutant tumors, bevacizumab is the preferred biological therapy. FOLFOX (folinic acid, 5-FU, and oxaliplatin) is preferred for initial therapy in Asian patients. The management of mCRC is evolving, and it must be emphasized that the recommendations presented here reflect current treatment practices and thus might change as more data become available.
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