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Koh W, Benscoter A, Chlebowski M, Cooper D, Lehenbauer D, Winlaw D, Morales D, Hayes D. Innovative Clinical Model in Managing Children with Refractory Lung Failure. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Ho J, Kovalik J, Gao F, Zhao X, Shuang L, Teo L, Tan R, Ewe S, Wee H, Ching J, Koh W, Zhong L, Koh A. Adverse cardiovascular ageing among older women and cardiometabolic ageing. Eur Heart J Cardiovasc Imaging 2021. [DOI: 10.1093/ehjci/jeaa356.421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Public hospital(s). Main funding source(s): National Medical Research Council (NMRC)
Background
Despite longer life expectancies, women may experience reduced ‘health-span’ (period of life spent in good health) due to accumulation of risks over their longer life spans. Metabolic factors present in diet and lifestyle may provide modifiable solutions to tackle burdens of cardiovascular (CV) ageing in women.
Objective
We aim to study gender differences in CV structure and function among community older adults without clinical CV disease, as well as metabolic perturbations in their study samples.
Methods
We examined a prospective cohort study of older adults, obtaining their medical history, serum sampling, echocardiography and cardiac magnetic resonance (CMR) imaging on a single day visit. Echo E/A ratio was computed as a ratio of peak velocity flow in early diastole E (m/s) to peak velocity flow in late diastole by atrial contraction A (m/s) mitral inflow velocities. Longitudinal strain (ε) at any time point (t) in the cardiac cycle from end-diastole (time 0) was calculated as: ε(t)=(L(t)-L0)/L0, obtaining left atrial (LA) reservoir strain (εs), conduit strain (εe) and booster strain (εa) by CMR. Metabolomics profiling was performed by standard mass spectrometry techniques.
Results
Among n = 492 (49.6%, n = 244 women, mean age 73 ± 4 years) participants, women had lower prevalence of hypertension (52% vs 58%, p < 0.0001), smoking (4% vs 35%, p < 0.0001), but higher prevalence of dyslipidemia (52% vs 50%, p = 0.001) compared to men. Women had lower left ventricular mass index (69 vs 71 g/m2, p < 0.0001) compared to men. However, women had more adverse CV function, such as lower E/A ratio (0.78 vs 0.85, p < 0.0001), lower LA booster (εa) (16.5 vs 17.8, p = 0.027) and lower LA reservoir (εs) strain rate (1.5 vs 1.6, p = 0.012), compared to men. Amino acids such as alanine, arginine, aspartate, citrulline, glycine, phenylalanine and valine were similar between gender. However, women had higher levels of tyrosine (76 vs 68 μM, p = 0.015). On multivariate adjustment, apart from age, tyrosine was independently associated with E/A ratio (β=0.002, 95%CI 0.00-0.004, p = 0.044) and εs (β=0.004, 95%CI 0.00-0.009, p = 0.048) among women.
Conclusion
Utilizing conventional and sensitive CV imaging, women appeared to have more adverse CV functions with ageing. As a branched chain amino acid linked to future risk of CV disease, tyrosine may be linked to adverse CV function. Factors that contribute to these cardiometabolic profiles, such as menopause, diet or lifestyle warrant further research.
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Affiliation(s)
- J Ho
- National Heart Centre Singapore, Singapore, Singapore
| | - J Kovalik
- Singapore General Hospital, Singapore, Singapore
| | - F Gao
- National Heart Centre Singapore, Singapore, Singapore
| | - X Zhao
- National Heart Centre Singapore, Singapore, Singapore
| | - L Shuang
- National Heart Centre Singapore, Singapore, Singapore
| | - L Teo
- National Heart Centre Singapore, Singapore, Singapore
| | - R Tan
- National Heart Centre Singapore, Singapore, Singapore
| | - S Ewe
- National Heart Centre Singapore, Singapore, Singapore
| | - H Wee
- Duke-NUS Graduate Medical School Singapore, Singapore, Singapore
| | - J Ching
- Duke-NUS Graduate Medical School Singapore, Singapore, Singapore
| | - W Koh
- Duke-NUS Graduate Medical School Singapore, Singapore, Singapore
| | - L Zhong
- Duke-NUS Graduate Medical School Singapore, Singapore, Singapore
| | - A Koh
- National Heart Centre Singapore, Singapore, Singapore
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Kim N, Jung Y, Jang J, Cheon D, Koh W, Kim J, Ko J, Ro Y. 563 Incisional biopsy-induced spontaneous regression with halo phenomenon in a congenital melanocytic nevus. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Sit D, Koh W, Shokoohi A, Tran E, Berthelet E, Wu J, Olson R, Hamilton S. Treatment and Outcomes in pT4 Well-Differentiated Thyroid Carcinoma. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zuo H, Ueland PM, Midttun Ø, Tell GS, Fanidi A, Zheng W, Shu X, Xiang Y, Wu J, Prentice R, Pettinger M, Thomson CA, Giles GG, Hodge A, Cai Q, Blot WJ, Johansson M, Hultdin J, Grankvist K, Stevens VL, McCullough ML, Weinstein SJ, Albanes D, Ziegler RG, Freedman ND, Caporaso NE, Langhammer A, Hveem K, Næss M, Buring JE, Lee I, Gaziano JM, Severi G, Zhang X, Stampfer MJ, Han J, Zeleniuch-Jacquotte A, Marchand LL, Yuan J, Wang R, Koh W, Gao Y, Ericson U, Visvanathan K, Jones MR, Relton C, Brennan P, Johansson M, Ulvik A. Vitamin B6 catabolism and lung cancer risk: results from the Lung Cancer Cohort Consortium (LC3). Ann Oncol 2019; 30:478-485. [PMID: 30698666 PMCID: PMC6442648 DOI: 10.1093/annonc/mdz002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Increased vitamin B6 catabolism related to inflammation, as measured by the PAr index (the ratio of 4-pyridoxic acid over the sum of pyridoxal and pyridoxal-5'-phosphate), has been positively associated with lung cancer risk in two prospective European studies. However, the extent to which this association translates to more diverse populations is not known. MATERIALS AND METHODS For this study, we included 5323 incident lung cancer cases and 5323 controls individually matched by age, sex, and smoking status within each of 20 prospective cohorts from the Lung Cancer Cohort Consortium. Cohort-specific odds ratios (ORs) and 95% confidence intervals (CIs) for the association between PAr and lung cancer risk were calculated using conditional logistic regression and pooled using random-effects models. RESULTS PAr was positively associated with lung cancer risk in a dose-response fashion. Comparing the fourth versus first quartiles of PAr resulted in an OR of 1.38 (95% CI: 1.19-1.59) for overall lung cancer risk. The association between PAr and lung cancer risk was most prominent in former smokers (OR: 1.69, 95% CI: 1.36-2.10), men (OR: 1.60, 95% CI: 1.28-2.00), and for cancers diagnosed within 3 years of blood draw (OR: 1.73, 95% CI: 1.34-2.23). CONCLUSION Based on pre-diagnostic data from 20 cohorts across 4 continents, this study confirms that increased vitamin B6 catabolism related to inflammation and immune activation is associated with a higher risk of developing lung cancer. Moreover, PAr may be a pre-diagnostic marker of lung cancer rather than a causal factor.
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Affiliation(s)
- H Zuo
- Department of Global Public Health and Primary Care, University of Bergen, Bergen.
| | - P M Ueland
- Department of Clinical Science, University of Bergen, Bergen; Laboratory of Medicine and Pathology, Haukeland University Hospital, Bergen
| | | | - G S Tell
- Department of Global Public Health and Primary Care, University of Bergen, Bergen
| | - A Fanidi
- Genetic Epidemiology Group, International Agency for Research on Cancer, Lyon, France; MRC Epidemiology Unit, University of Cambridge, Cambridge, UK
| | - W Zheng
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, USA
| | - X Shu
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, USA
| | - Y Xiang
- State Key Laboratory of Oncogene and Related Genes & Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - J Wu
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, USA
| | - R Prentice
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle
| | - M Pettinger
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle
| | - C A Thomson
- Health Promotion Sciences, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, USA
| | - G G Giles
- Cancer Epidemiology Centre, Cancer Council Victoria, Melbourne; Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Melbourne, Australia
| | - A Hodge
- Cancer Epidemiology Centre, Cancer Council Victoria, Melbourne; Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Melbourne, Australia
| | - Q Cai
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, USA
| | - W J Blot
- Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, USA
| | - M Johansson
- Department of Radiation Sciences, Oncology, Umeå University, Umeå
| | - J Hultdin
- Department of Medical Biosciences, Clinical Chemistry, Umeå University, Umeå, Sweden
| | - K Grankvist
- Department of Medical Biosciences, Clinical Chemistry, Umeå University, Umeå, Sweden
| | - V L Stevens
- Behavioral and Epidemiology Research Group, American Cancer Society, Atlanta
| | - M L McCullough
- Behavioral and Epidemiology Research Group, American Cancer Society, Atlanta
| | - S J Weinstein
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, USA
| | - D Albanes
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, USA
| | - R G Ziegler
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, USA
| | - N D Freedman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, USA
| | - N E Caporaso
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, USA
| | - A Langhammer
- HUNT Research Centre, Department of Public Health and Nursing, Faculty of Medicine and Health Science, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
| | - K Hveem
- HUNT Research Centre, Department of Public Health and Nursing, Faculty of Medicine and Health Science, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
| | - M Næss
- HUNT Research Centre, Department of Public Health and Nursing, Faculty of Medicine and Health Science, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
| | - J E Buring
- Division of Preventive Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston
| | - I Lee
- Division of Preventive Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston
| | - J M Gaziano
- Division of Aging, Brigham and Women's Hospital, Boston; VA Boston Healthcare System, Boston, USA
| | - G Severi
- Human Genetics Foundation (HuGeF), Torin, Italy; CESP (U1018 INSERM), Université Paris-Saclay, USQ, Villejuif, France
| | - X Zhang
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston
| | - M J Stampfer
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston; Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston
| | - J Han
- Department of Epidemiology, Richard M. Fairbanks School of Public Health, Melvin & Bren Simon Cancer Center, Indiana University, Indianapolis
| | | | - L L Marchand
- Epidemiology Program, University of Hawaii Cancer Center, Honolulu
| | - J Yuan
- Division of Cancer Control and Population Sciences, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh; Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, USA
| | - R Wang
- Division of Cancer Control and Population Sciences, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh
| | - W Koh
- Duke-NUS Medical School, Singapore and Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
| | - Y Gao
- Department of Epidemiology, Shanghai Cancer Institute, Shanghai Jiaotong University, Shanghai, China
| | - U Ericson
- Department of Clinical Sciences Malmö, Lund University, Lund, Sweden
| | - K Visvanathan
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health and Johns Hopkins Sidney Kimmel Comprehensive Center, School of Medicine, Baltimore, USA
| | - M R Jones
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health and Johns Hopkins Sidney Kimmel Comprehensive Center, School of Medicine, Baltimore, USA
| | - C Relton
- Institute of Genetic Medicine, Newcastle University, Newcastle; MRC Integrative Epidemiology Unit, School of Social & Community Medicine, University of Bristol, Bristol, UK
| | - P Brennan
- Genetic Epidemiology Group, International Agency for Research on Cancer, Lyon, France
| | - M Johansson
- Genetic Epidemiology Group, International Agency for Research on Cancer, Lyon, France
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Lee J, Shin J, Lee Y, Kim J, Kim M, Koh W, Shin B, Lee M, Ha I. Long-term course and predictive factors associated with disc resorption in lumbar disc herniation patients. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chen C, Sidharta S, Koh W, Yuan J, Ma S, Heng D, Tan K, Yoong J. FORECASTING HOSPITAL UTILIZATION AND COST OF FUTURE ELDERLY IN SINGAPORE. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.1466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- C. Chen
- University of Southern California, Los Angeles, California,
- National University of Singapore, Singapore, Singapore
| | - S. Sidharta
- National University of Singapore, Singapore, Singapore
| | - W. Koh
- Duke NUS, Singapore, Singapore,
| | - J. Yuan
- University of Pittsburgh, Pittsburgh, Pennsylvania,
| | - S. Ma
- Ministry of Health, Singapore, Singapore
| | - D. Heng
- Ministry of Health, Singapore, Singapore
| | - K. Tan
- Ministry of Health, Singapore, Singapore
| | - J. Yoong
- University of Southern California, Los Angeles, California,
- National University of Singapore, Singapore, Singapore
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Chaabane S, Hoffman C, Kim G, Kay P, Yarosh C, Koh W, Jahr J. A prospective, double-blind, randomized controlled study evaluating the effects of two new IV medications, IV acetaminophen and/or IV ibuprofen, on standard of care pain and antiemetic management in uterine fibroid embolization patients. J Vasc Interv Radiol 2017. [DOI: 10.1016/j.jvir.2016.12.698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Cho M, Lee DH, Kim Y, Koh W, Chung JH, Kim HC, Kim S. Development and clinical validation of a novel photography-based skin pigmentation evaluation system: a comparison with the calculated consensus of dermatologists. Int J Cosmet Sci 2015; 38:399-408. [PMID: 26705766 DOI: 10.1111/ics.12303] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 12/16/2015] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Various cosmetics, medicines, and light and laser treatments have been increasingly developed to improve pigmentary skin alterations such as melasma, actinic lentigo and dyschromia. To determine the efficacy of these modalities in view of the changes in pigmentation, an objective and reliable device that has a comparable performance to that of physicians is required. We developed a novel photography-based skin pigmentation evaluation system and validated its accuracy and reliability with a newly proposed method. METHODS A novel photography-based system was developed that integrates a consistent photography setting and image processing diagnostic algorithms. To automatically detect areas of pigmentation, the diagnostic algorithms were applied to photographs, which were obtained from 31 female patients. To validate its performance in comparison with the physicians' evaluation, five dermatologists independently evaluated the area of pigmentation. The clinical consensus area of pigmentation (CCAP) was calculated based on the consensus of five dermatologists' to exclude subjectivity or bias, and it was compared with the pigmentation area determined by the system. RESULTS Forty-four photographs with pigmented areas were evaluated by the system and the physicians. In contrast to the individual physician assessments, CCAP reduced the error that occurred due to subjectivity and bias, particularly for areas with indistinct pigmentation, and it was set as the gold standard. The results from the system showed a mean accuracy of 92.1% and a standard deviation of 4.6% in comparison with CCAP. CONCLUSION This pigmentation evaluation system can reproduce the physicians' consensus, suggesting that this system can support the dermatologists' objective evaluation of pigmentation.
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Affiliation(s)
- M Cho
- Interdisciplinary Program for Bioengineering, Graduate School, Seoul National University, Seoul, 110-744, Korea
| | - D-H Lee
- Department of Dermatology, Seoul National University Hospital, Seoul, 110-744, Korea
| | - Y Kim
- Department of Biomedical Engineering, Seoul National University Hospital, Seoul, 110-744, Korea
| | - W Koh
- JMO Dermatology, Seoul, 135-887, Korea
| | - J H Chung
- Department of Dermatology, Seoul National University Hospital, Seoul, 110-744, Korea
| | - H C Kim
- Department of Biomedical Engineering, Seoul National University College of Medicine, Seoul, 110-799, Korea.,Institute of Medical and Biological Engineering, Seoul National University, Seoul, 151-742, Korea
| | - S Kim
- Department of Biomedical Engineering, Seoul National University College of Medicine, Seoul, 110-799, Korea.,Institute of Medical and Biological Engineering, Seoul National University, Seoul, 151-742, Korea
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Kusano A, Voss J, Bremjit P, Fichera A, Koh W, Kim E, Apisarnthanarax S. Preoperative Short Course Radiation for Locally Advanced Rectal Cancer: A National Opinion Survey. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1785] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Ke T, Dorajoo R, Han Y, Khor C, Van Dam R, Yuan J, Koh W, Liu J, Teo Y, Goh D, Tai E, Wong T, Friedlander Y, Heng C. Associations of snps in peroxisome proliferator activated receptors with high density lipoprotein, and gene-gene interactions in singaporean chinese. Atherosclerosis 2014. [DOI: 10.1016/j.atherosclerosis.2014.05.660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Koh W, Lim K, Tey J. Hypofractionated Breast Radiation Therapy: Acute Toxicity in Asian Skin Types. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Tey J, Koh W, Leong C, Choo B, Wong L, Lu J. Clinical Outcome of Palliative Radiation Therapy in Locally Advanced, Symptomatic Gastric Cancer in the Modern Era. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Chuang L, Thomas G, Price F, Miller B, Koh W, Perez LC, Dueñas-Gonzalez A, Jhingran A, Creasman W. Management of cervical cancer in low-resource settings. Gynecol Oncol 2012. [DOI: 10.1016/j.ygyno.2011.12.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Moore D, Ali S, Barnes M, Koh W, Michael H, McCourt C, Homesley H, Walker J. A phase II trial of radiation therapy and weekly cisplatin chemotherapy for the treatment of locally advanced squamous cell carcinoma of the vulva: A Gynecologic Oncology Group study. Gynecol Oncol 2011. [DOI: 10.1016/j.ygyno.2010.12.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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King B, Loiselle C, Carlson T, Werner H, Koh W. Clinical Outcomes for Tandem and Ring Brachytherapy for Cervix Cancer at the University of Washington. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Ng RC, Verkooijen H, Ooi LL, Koh W. Unmet psychosocial needs among cancer patients at the National Cancer Centre Singapore (NCCS). J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Duryea J, Neumann G, Brem MH, Koh W, Noorbakhsh F, Jackson RD, Yu J, Eaton CB, Lang P. Novel fast semi-automated software to segment cartilage for knee MR acquisitions. Osteoarthritis Cartilage 2007; 15:487-92. [PMID: 17188525 PMCID: PMC4175990 DOI: 10.1016/j.joca.2006.11.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2006] [Accepted: 11/06/2006] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Validation of a new fast software technique to segment the cartilage on knee magnetic resonance (MR) acquisitions. Large studies of knee osteoarthritis (OA) will require fast and reproducible methods to quantify cartilage changes for knee MR data. In this report we document and measure the reproducibility and reader time of a software-based technique to quantify the volume and thickness of articular cartilage on knee MR images. METHODS The software was tested on a set of duplicate sagittal three-dimensional (3D) dual echo steady state (DESS) acquisitions from 15 (8 OA, 7 normal) subjects. The repositioning, inter-reader, and intra-reader reproducibility of the cartilage volume (VC) and thickness (ThC) were measured independently as well as the reader time for each cartilage plate. The root-mean square coefficient of variation (RMSCoV) was used as metric to quantify the reproducibility of VC and mean ThC. RESULTS The repositioning RMSCoV was as follows: VC=2.0% and ThC=1.2% (femur), VC=2.9% and ThC=1.6% (medial tibial plateau), VC=5.5% and ThC=2.4% (lateral tibial plateau), and VC=4.6% and ThC=2.3% (patella). RMSCoV values were higher for the inter-reader reproducibility (VC: 2.5-8.6%) (ThC: 1.9-5.2%) and lower for the intra-reader reproducibility (VC: 1.6-2.5%) (ThC: 1.2-1.9%). The method required an average of 75.4min per knee. CONCLUSIONS We have documented a fast reproducible semi-automated software method to segment articular cartilage on knee MR acquisitions.
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Affiliation(s)
- J Duryea
- Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
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Kadish KM, Koh W, Tagliatesta P, Sazou D, Paolesse R, Licoccia S, Boschi T. Electrochemistry of rhodium and cobalt corroles. Characterization of (OMC)Rh(PPh3) and (OMC)Co(PPh3) where OMC is the trianion of 2,3,7,8,12,13,17,18-octamethylcorrole. Inorg Chem 2002. [DOI: 10.1021/ic00038a005] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jelinek JA, Stelzer KJ, Conrad E, Bruckner J, Kliot M, Koh W, Laramore GE. The efficacy of radiotherapy as postoperative treatment for desmoid tumors. Int J Radiat Oncol Biol Phys 2001; 50:121-5. [PMID: 11316554 DOI: 10.1016/s0360-3016(00)01570-4] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
PURPOSE The purpose of this study was to determine if radiotherapy is a beneficial adjuvant treatment after desmoid tumor resection. METHODS AND MATERIALS A retrospective analysis was performed on 54 patients who underwent surgery without prior radiation at our institution between 1982 and 1998 to remove a desmoid tumor. Thirty-five patients had adjuvant radiation therapy after surgery, and 19 patients had surgery alone without immediate postoperative radiation. Sixteen of the 35 patients who underwent immediate postoperative radiation treatment had at least one prior resection before reoperation at our institution. Recurrence was defined as radiographic increase in tumor size after treatment. Follow-up interval (mean 39 months) and duration of local control were measured from the date of surgery at our institution. Potential prognostic factors for time to tumor progression were analyzed. RESULTS Adjuvant treatment with radiation was the only significant prognostic factor for local control. The five-year actuarial local control rate was 81% for the 35 patients who underwent radiation in addition to surgery, compared to 53% for the 19 patients who underwent surgery alone (p = 0.018). For the patients who did not receive adjuvant radiation, only younger age at the time of surgery was associated with increased risk of failure (p = 0.035). Gross or microscopic margin status and number of prior operations were not detected as prognostic for local failure. For patients who did receive postoperative radiation, only abdominal location was associated with increased risk of failure (p = 0.0097). CONCLUSION Radiation treatment as an adjuvant to surgery improved local control over surgery alone. Multiple operations before adjuvant radiation did not decrease the probability of subsequent tumor control. Radiation should be considered as adjuvant therapy to surgery if repeated surgery for a recurrent tumor would be complicated by a significant risk of morbidity.
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Affiliation(s)
- J A Jelinek
- University of Washington School of Medicine, Seattle, WA, USA
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Abstract
BACKGROUND The use of percutaneously placed feeding tubes has increased in recent years in an effort to maintain adequate caloric balance in patients receiving combined therapy for head and neck cancers, particularly concurrent radiotherapy and chemotherapy. METHODS We report a case of a metastasis to a percutaneous endoscopic gastrostomy site occurring in a patient with an advanced tonsillar squamous cell carcinoma and review the published literature regarding this subject. Radiobiologic principles were examined to explain the most likely cause of such metastases. RESULTS Six cases of percutaneous endoscopic site metastases occurring in patients with head and neck primary tumors have been reported in the literature. The interval from performance of the procedure to development of the metastases ranged from 3 to 16 months. Tumor kinetics suggest that a significant tumor burden (10(5)-10(6) cells) would need to be present at the site to manifest a metastatic lesion in such a short time interval. CONCLUSIONS The development of metastases at percutaneous endoscopic gastrostomy sites is a relatively uncommon occurrence. Direct tumor implantation by means of instrumentation at the time of the procedure is most likely explanation for such metastases, although hematogenous seeding cannot be completely discounted. Techniques should be used so as not to disrupt the tumor bed, particularly when gross residual disease is present.
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Affiliation(s)
- J G Douglas
- Department of Radiation Oncology, University of Washington Medical Center, 1959 N. E. Pacific St., Box 356043, Seattle, Washington 98195-6043, USA
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Douglas JG, Laramore GE, Austin-Seymour M, Koh W, Stelzer K, Griffin TW. Treatment of locally advanced adenoid cystic carcinoma of the head and neck with neutron radiotherapy. Int J Radiat Oncol Biol Phys 2000; 46:551-7. [PMID: 10701733 DOI: 10.1016/s0360-3016(99)00445-9] [Citation(s) in RCA: 147] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE To examine the efficacy of fast neutron radiotherapy for the treatment of locally advanced and/or recurrent adenoid cystic carcinoma of the head and neck and to identify prognostic variables associated with local-regional control and survival. METHODS AND MATERIALS One hundred fifty-nine patients with nonmetastatic, previously unirradiated, locally advanced, and/or recurrent adenoid cystic carcinoma (ACC) of the head and neck region were treated with fast neutron radiotherapy during the years 1985-1997. One hundred fifty-one patients had either unresectable disease, or gross residual disease (GRD) after an attempted surgical extirpation. Eight patients had microscopic residual disease and were analyzed separately. Sixty-two percent of patients had tumors arising in minor salivary glands, 29% in major salivary glands, and 9% in other sites such as the lacrimal glands, tracheal-bronchial tree, etc. Fifty-five percent of patients were treated for postsurgical recurrent disease and 13% of patients had lymph node involvement at the time of treatment. The median duration of follow-up was 32 months (range 3-142 months). Actuarial curves for survival, cause-specific survival, local-regional control, and the development of distant metastases are presented for times out to 11 years. RESULTS The 5-year actuarial local-regional tumor control rate for the 151 patients with GRD was 57%; the 5-year actuarial overall survival rate was 72%; and the 5-year actuarial cause-specific survival rate was 77%. Variables associated with decreased local-regional control in the patients with GRD as determined by multivariate analysis included base of skull involvement (p < 0.01) and biopsy only versus an attempted surgical resection prior to treatment (p = 0.03). Patients without these negative factors had an actuarial local-regional control rate of 80% at 5 years. Patients with microscopic residual disease (n = 8) had a 5-year actuarial local-regional control rate of 100%. Base of skull involvement (p < 0.001), lymph node metastases at the time of treatment (p < 0.01), biopsy only prior to neutron radiotherapy (p = 0.03), and recurrent tumors (p = 0.04) were found to be associated with a diminished cause-specific survival as ascertained by multivariate analysis. Patients with base of skull involvement and positive lymph nodes at presentation had an increased rate of the development of distant metastases at 5 years, (p < 0.01 and p < 0.001, respectively). No statistical difference in outcome was observed between major and minor salivary gland sites. CONCLUSIONS Fast neutron radiotherapy is an effective treatment for locally advanced ACC of the head and neck region with acceptable toxicity. Further improvements in local-regional control are not likely to impact survival until more effective systemic agents are developed to prevent and/or treat distant metastatic disease.
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Affiliation(s)
- J G Douglas
- Department of Radiation Oncology, University of Washington Medical Center, Seattle 98195-6043, USA.
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Abstract
BACKGROUND Malignant salivary gland tumors are rare tumors of the head and neck region. The treatment of these tumors has generally consisted of surgical extirpation, with postoperative radiotherapy improving locoregional control and survival in patients with high risk tumors. Neutron radiotherapy has been found to be more efficacious than conventional radiotherapy in the setting of inoperable or subtotally resected salivary gland tumors. METHODS One hundred forty-eight patients with malignant salivary tumors of major salivary gland origin were treated at the University of Washington Medical Center with fast neutron radiotherapy between the years 1984 and 1995. One hundred twenty-eight patients were treated with curative intent, and of these, 120 patients had evidence of gross residual disease at the time of treatment. These patients constitute the main analysis of this paper. Of these patients, 19% had recurrent disease, 39% were initially seen with positive lymph nodes, and 11% had previously received full dose conventional radiotherapy. At the time of analysis, the median period at risk of survivors was 26 months. RESULTS The 5-year actuarial locoregional control rate for all patients with gross tumor treated with curative intent was 59%. A tumor size < or =4 cm was associated with an excellent locoregional control rate (80%), and cause-specific survival (73%) at 5 years compared with patients with larger tumors (35% and 22%, respectively, p<.001 in both cases). On univariate analysis, there appeared to be an advantage in locoregional control for patients with smaller sized tumors (< or =4 cm) who underwent an attempted surgical extirpation. Locoregional control was excellent (100%) in patients having a complete surgical resection of their tumors and undergoing postoperative neutron radiotherapy because of the presence of other high risk factors. Lymph node status at the time of treatment, base of skull involvement, and male sex were associated with the development of distant metastasis, with 52% of node positive patients developing distant metastases by 5 years, compared with 32% of node negative patients (p = .04). CONCLUSIONS Neutron radiotherapy is an effective form of treatment for patients with high risk, locally advanced tumors of major salivary gland origin. An initial surgical resection appears beneficial in patients for whom such an approach is feasible.
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Affiliation(s)
- J G Douglas
- Department of Radiation Oncology, University of Washington Medical Center, Seattle 98195-6043, USA
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Thomas CR, Wood LV, Douglas JG, Stelzer KJ, Koh W, Panicker R. Common emergencies in cancer medicine: infectious and treatment-related syndromes, Part I. J Natl Med Assoc 1994; 86:765-74. [PMID: 7807561 PMCID: PMC2607708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
This two-part article, the last in a series of articles on cancer emergencies, summarizes the common medical emergencies that can occur as a result of infectious processes (Part I) and antitumor treatment secondary to chemotherapy, biological response modifiers, or radiotherapy (Part II). The use of high-dose cytotoxic agents, coupled with the common instillation of indwelling central venous access devices, have altered the spectrum of infectious etiologies that are appreciated in clinical practice. In addition, a myriad of cytotoxic agents and radiotherapeutic treatment schemes are used widely in clinical oncologic practice. While most of their related side effects are not considered life-threatening emergencies, they can be fatal if not recognized early and treated promptly. Moreover, some of these infectious and treatment-related sequelae can be prevented.
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Affiliation(s)
- C R Thomas
- Division of Oncology, University of Washington School of Medicine, Seattle
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Russell KJ, Boileau MA, Higano C, Collins C, Russell AH, Koh W, Cole SB, Chapman WH, Griffin TW. Combined 5-fluorouracil and irradiation for transitional cell carcinoma of the urinary bladder. Int J Radiat Oncol Biol Phys 1990; 19:693-9. [PMID: 2211217 DOI: 10.1016/0360-3016(90)90498-9] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Thirty-four patients have completed treatment on a bladder-preservation protocol using primary irradiation combined with infusion 5-fluorouracil (5-FU). 4,000 cGy pelvic irradiation was delivered in 5 weeks, with 1,000 mg/m2/day of 5-FU administered as a 96 hr infusion on days 1-4 of week 1 and 4. After a 3-week rest period, patients eligible for cystectomy underwent cystoscopy and biopsy. Those with residual tumor underwent cystectomy, and those without tumor received an additional cycle of chemotherapy and irradiation. Patients ineligible for cystectomy for reasons medical, surgical, or refusal received a third cycle without the 4-week delay or re-evaluation. With a median follow-up of 18 months (range 2-45 months), and with 25/34 patients having T3 (16) or T4 (9) tumors, 17 patients are NED, 4 have died of intercurrent deaths, 7 have died with bladder cancer, and 6 are alive with tumor (2 confined to the bladder). The actuarial cancer-specific survival for the entire group of patients is 64% (+/- 12%) at 45 months, with a freedom from relapse of invasive cancer of 54% (+/- 10%). Twenty-four of the 34 patients retained intact bladders, with 20/24 reporting entirely normal voiding. Of 18 potential surgical candidates, 13/16 (81%) who underwent pathologic re-staging after 2 cycles of chemoradiotherapy had no histologic evidence of residual cancer. Of these 13 patients, 8 remain NED and 2/13 have locally recurrent non-invasive tumors only. Treatment was well-tolerated, with 28/34 patients having received 100% of the planned 5-FU and 34/34 having received greater than 80%. This regimen appears more successful than radiotherapy alone in achieving complete tumor responses, and is an attractive alternative for patients who are unable to receive more aggressive chemotherapy/radiation combinations.
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Affiliation(s)
- K J Russell
- Dept. of Radiation Oncology, University of Washington Medical Center, Seattle, WA 98195
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Laramore GE, Griffith JT, Boespflug M, Pelton JG, Griffin T, Griffin BR, Russell KJ, Koh W, Parker RG, Davis LW. Fast neutron radiotherapy for sarcomas of soft tissue, bone, and cartilage. Am J Clin Oncol 1989; 12:320-6. [PMID: 2667322 DOI: 10.1097/00000421-198908000-00009] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The basic radiobiological rationale for the use of fast neutron radiotherapy in the treatment of classically radioresistant tumors such as soft tissue sarcomas, osteogenic sarcomas, and chondrosarcomas is reviewed. There are no definitive randomized studies comparing high and low linear energy transfer radiotherapy for these tumor systems, but a review of published series is highly suggestive of a therapeutic advantage for fast neutrons. For soft tissue sarcomas, the local control rate is 53% (158 of 297) with fast neutrons, compared with 38% (49 of 128) with photons/electrons; for osteogenic sarcomas, the local control rate is 55% (40 of 73) with fast neutrons, compared with 21% (15 of 73) with photons/electrons; and for chondrosarcomas, the local control rate is 49% (25 of 51) with fast neutrons, compared with 33% (10 of 30) with photons/electrons. An ongoing clinical trial for these tumors is also described.
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Affiliation(s)
- G E Laramore
- University of Washington, Department of Radiation Oncology, Seattle
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Russell K, Higano C, Boileau M, Russell A, Collings C, Koh W, Chapman W, Griffin T. Combined 5-fluorouracil and irradiation for the treatment of invasive bladder cancer. Int J Radiat Oncol Biol Phys 1989. [DOI: 10.1016/0360-3016(89)90728-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Oran E, Gupta S, Yeo B, Nandi AC, Koh W, Lauterstein J, Potter R, Manoli A, Pissone VA. Idiopathic hypertrophic subaortic stenosis in patients with coronary artery disease--importance of recognition and principles of management. Angiology 1973; 24:538-48. [PMID: 4543282 DOI: 10.1177/000331977302400905] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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