1
|
Ryden NA, Lam H, Judge C, Venteicher AS, Lee MS. Transient Visual Obscurations Without Papilloedema as the Heralding Symptom of Chiasmal Compression. Neuroophthalmology 2022; 47:106-109. [PMID: 36891405 PMCID: PMC9988334 DOI: 10.1080/01658107.2022.2127790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 08/03/2022] [Revised: 09/08/2022] [Accepted: 09/15/2022] [Indexed: 10/17/2022] Open
Abstract
Transient visual obscurations (TVOs) represent brief ischaemic events of the optic nerve. These most commonly occur in the setting of raised intracranial pressure or more localised aetiologies within the orbit that result in decreased perfusion pressure. Transient vision loss has rarely been associated with pituitary tumours or optic chiasm compression, but details are lacking. We describe classic TVOs that completely resolved following resection of a pituitary macroadenoma causing chiasmal compression with a relatively normal eye examination. Clinicians should consider neuro-imaging in patients with TVOs and a normal evaluation.
Collapse
Affiliation(s)
- Niels A. Ryden
- University of Minnesota Medical School, Minneapolis, Minnesota, USA
| | - Helena Lam
- Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, Minnesota, USA
| | - Casey Judge
- Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, Minnesota, USA
| | - Andrew S. Venteicher
- Department of Neurosurgery, University of Minnesota, Minneapolis, Minnesota, USA
| | - Michael S. Lee
- Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, Minnesota, USA
| |
Collapse
|
2
|
Lam H, Maltry AC, Harrison AR, Mokhtarzadeh A. Antineutrophil Cytoplasmic Antibody-Associated Vasculitis With Immunoglobulin G4 Involvement in Lacrimal Sac Squamous Cell Carcinoma. Ophthalmic Plast Reconstr Surg 2022; 38:e147-e150. [PMID: 35551408 DOI: 10.1097/iop.0000000000002187] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Lacrimal sac squamous cell carcinoma is a rare but life-threatening disease that is often a delayed diagnosis secondary to difficulty in differentiating from other causes of dacrocystitis and acquired nasolacrimal duct obstruction. Chronic inflammation, including that of an underlying autoimmune disease, prior instrumentation, and poor wound healing, may be risk factors in the development to lacrimal sac squamous cell carcinoma. The authors present the first case of lacrimal sac squamous cell carcinoma associated with antineutrophil cytoplasmic antibody-associated vasculitis and immunoglobulin G4 positivity. Rather than an overlap syndrome between antineutrophil cytoplasmic antibody-associated vasculitis and immunoglobulin G4-related disease, high immunoglobulin G4 positivity may be considered an inflammatory marker of disease severity in the setting of antineutrophil cytoplasmic antibody-associated vasculitis and underlying malignancy. Inflammation-mediated tumorangiogenesis should be considered in the development of malignancy and red flags of chronic uncontrolled inflammation should warrant a lower threshold for further workup.
Collapse
Affiliation(s)
- Helena Lam
- Department of Ophthalmology and Visual Neurosciences
| | | | | | | |
Collapse
|
3
|
Lam H, Khundkar T, Koozekanani D, Nazari HK. Rothia Mucilaginosa Endophthalmitis Associated With iStent Inject Implantation. J Glaucoma 2022; 31:e37-e40. [PMID: 35649260 DOI: 10.1097/ijg.0000000000002033] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 03/27/2022] [Indexed: 11/26/2022]
Abstract
Postoperative endophthalmitis caused by Rothia mucilaginosa, a gram-positive, coagulase-negative Micrococcaceae of the oropharyngeal flora, is rare and all previously reported intraocular implant-related cases have resulted in evisceration. R. mucilaginosa endophthalmitis has also not been described with any glaucoma implant device. Here, the authors report a case of subacute R. mucilaginosa endophthalmitis after phacoemulsification with implantation of an intraocular lens and the iStent inject (Glaukos). The infection was managed with intravitreal antibiotic injections, pars plana vitrectomy, and intraocular lens and iStent explantations. This was followed by a second pars plana vitrectomy and silicone oil tamponade for a tractional retinal detachment. Nine months after the initial presentation, vision in the affected eye was partially preserved, and the globe remained intact. R. mucilaginosa infections are associated with grave outcomes due to biofilm formation on infected implants, and as such, removal of infected implants is advised.
Collapse
Affiliation(s)
- Helena Lam
- Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, MN
| | | | | | | |
Collapse
|
4
|
Capeding TPJ, Rosa JD, Lam H, Gaviola DG, Garfin AMC, Hontiveros C, Cunnama L, Laurence YV, Kitson N, Vassall A, Sweeney S, Garcia-Baena I. Cost of TB prevention and treatment in the Philippines in 2017. Int J Tuberc Lung Dis 2022; 26:392-398. [PMID: 35505478 PMCID: PMC9067429 DOI: 10.5588/ijtld.21.0622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND: The Philippines aims to accelerate TB reduction through the provision of universally accessible and affordable services. The objectives of this paper are to estimate the costs of TB services and interventions using a health systems´ perspective, and to explore cost differences in service delivery via primary care facilities or hospitals.METHODS: Data were collected from a multi-stage stratified random sampling of 28 facilities in accordance with Global Health Cost Consortium costing standards and analysis tools. Unit costs (in US$) estimated using top-down (TD) and bottom-up (BU) approaches, are summarised following Value TB reporting standards and by broad facility type.RESULTS: Cost of delivering 32 TB services and eight interventions varied by costing method and delivery platform. Average BU costs ranged from US$0.38 for treatment support visits, US$2.5 for BCG vaccination, US$19.48 for the Xpert® MTB/RIF test to US$3,677 for MDR-TB treatment using the long regimen. Delivering TB care in hospitals was generally more costly than in primary care facilities, except for TB prevention in children and MDR-TB treatment using the long regimen.CONCLUSION: Comprehensive costing data for TB care in the Philippines are now available to aid in the design, planning, and prioritisation of delivery models to End TB.
Collapse
Affiliation(s)
- T. P. J. Capeding
- Institute of Health Policy and Development Studies, National Institutes of Health, University of the Philippines Manila, Manila, Philippines
| | - J. D. Rosa
- Institute of Health Policy and Development Studies, National Institutes of Health, University of the Philippines Manila, Manila, Philippines
| | - H. Lam
- Institute of Health Policy and Development Studies, National Institutes of Health, University of the Philippines Manila, Manila, Philippines
| | - D. G. Gaviola
- Department of Health, National TB Control Programme, Manila, Philippines
| | - A. M. C. Garfin
- Department of Health, National TB Control Programme, Manila, Philippines
| | - C. Hontiveros
- Department of Health, National TB Control Programme, Manila, Philippines
| | - L. Cunnama
- Health Economics Unit & Health Economics Division, University of Cape Town, Cape Town, South Africa
| | - Y. V. Laurence
- Department of Global Health and Development, Centre for Health Economics in London, London School of Hygiene & Tropical Medicine, London, UK
| | - N. Kitson
- Department of Global Health and Development, Centre for Health Economics in London, London School of Hygiene & Tropical Medicine, London, UK
| | - A. Vassall
- Department of Global Health and Development, Centre for Health Economics in London, London School of Hygiene & Tropical Medicine, London, UK
| | - S. Sweeney
- Department of Global Health and Development, Centre for Health Economics in London, London School of Hygiene & Tropical Medicine, London, UK
| | - I. Garcia-Baena
- Global TB Programme, World Health Organization, Geneva, Switzerland
| |
Collapse
|
5
|
Popovic M, Rico V, DeAngelis C, Lam H, Lim FMY. Online Psychological Intervention in Breast Cancer Survivors: a Review. Hong Kong Journal of Radiology 2022. [DOI: 10.12809/hkjr2217206] [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: 11/05/2022] Open
Affiliation(s)
- M Popovic
- Odette Cancer Centre, Sunnybrook Health Science Centre, University of Toronto, Toronto, Ontario, Canada
| | - V Rico
- Odette Cancer Centre, Sunnybrook Health Science Centre, University of Toronto, Toronto, Ontario, Canada
| | - C DeAngelis
- Odette Cancer Centre, Sunnybrook Health Science Centre, University of Toronto, Toronto, Ontario, Canada
| | - H Lam
- Odette Cancer Centre, Sunnybrook Health Science Centre, University of Toronto, Toronto, Ontario, Canada
| | - FMY Lim
- Department of Oncology, Prince Margaret Hospital, Hong Kong
| |
Collapse
|
6
|
Lam H, Zabrowski C, Lee M. Correction of vertical diplopia with soft contact lenses. Eye (Lond) 2022; 36:639-640. [PMID: 34326495 PMCID: PMC8873422 DOI: 10.1038/s41433-021-01708-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Accepted: 07/16/2021] [Indexed: 11/09/2022] Open
Affiliation(s)
- Helena Lam
- Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, MN, USA.
| | - Cheryl Zabrowski
- grid.17635.360000000419368657Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, MN USA
| | - Michael Lee
- Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, MN, USA.
| |
Collapse
|
7
|
Taylor P, Chan S, Wan AB, Chan CW, Rodrigues MM, Lam H, Chow E, Lim FMY. Cardiovascular Events and Mortality in Patients Undergoing Adjuvant Radiotherapy for Breast Cancer: a Systematic Review. Hong Kong Journal of Radiology 2021. [DOI: 10.12809/hkjr2117234] [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: 11/05/2022] Open
Affiliation(s)
- P Taylor
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - S Chan
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - AB Wan
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - CW Chan
- Department of Oncology, Princess Margaret Hospital, Hong Kong
| | - MM Rodrigues
- Centro Oncológico AZ do Noroeste, Patos de Minas, Minas Gerais, Brazil
| | - H Lam
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - E Chow
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - FMY Lim
- Department of Oncology, Princess Margaret Hospital, Hong Kong
| |
Collapse
|
8
|
Tsang PWM, Liu JP, Lam H, Poon TC. Optimal sampled phase-only hologram (OSPOH). Opt Express 2021; 29:25488-25498. [PMID: 34614879 DOI: 10.1364/oe.430776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A sampled phase-only hologram (SPOH) is the phase component of the hologram of an object image with pixels being sampled with a periodic grid-cross pattern. The reconstructed image of a SPOH is a sparse image with abundant empty voids and degradation in sharpness and contrast. In this paper we proposed a method based on a new sampling scheme, together with stochastic binary search (SBS), to obtain an optimal sampling lattice that can be applied to generate phase-only holograms with enhanced reconstructed image. Experimental results show that with our proposed method, the fidelity and quality of the reconstructed image are increased.
Collapse
|
9
|
Collins D, Lam H, Firdaus H, Antipolo J, Mangao P. Modeling the likely economic cost of non-adherence to TB medicines in the Philippines. Int J Tuberc Lung Dis 2020; 24:902-909. [PMID: 33156756 DOI: 10.5588/ijtld.19.0652] [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] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
SETTING: The Philippines has a population of over 90 million people and is one of the 22 highest TB burden countries in the world.OBJECTIVE: To understand the economic cost of non-adherence to TB medicines due to loss to follow up and stock-outs in the Philippines.DESIGN: Data were collected on the economic costs of non-adherence to TB medicines and a model was developed to show those costs under different scenarios.RESULTS: The model showed that as many as 1958 and 233 persons are likely to have died as a result of DS-TB and MDR-TB loss to follow up, respectively, and 588 persons are likely to have died as a result of TB medicine stock outs. The related economic impact in each case is likely have been to be as much as US$72.2 million, US$13.4 million and US$21.0 million, respectively.CONCLUSION: The economic costs of non-adherence to TB medicines due to loss to follow-up and stock-outs represent a significant economic burden for the country and it is likely that the cost of addressing these problems would be much less than this burden and, therefore, a wise investment.
Collapse
Affiliation(s)
- D Collins
- Management Sciences for Health, Medford, MA, Boston University School of Public Health, Boston, MA, USA
| | - H Lam
- University of the Philippines, Ermita, Manila, Philippines
| | - H Firdaus
- Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - J Antipolo
- Management Sciences for Health, Medford, MA
| | - P Mangao
- Management Sciences for Health, Medford, MA
| |
Collapse
|
10
|
Wong AMG, Cheung W, Wong M, Wong A, Lam H, Zhang Z, Man M, Chen H, Close D, Johnston P, Chan A, Lai P, Kwong J, Wong N. Abstract 3911: High-throughput screening of patient-derived HCC organoids for drug discovery. Cancer Res 2020. [DOI: 10.1158/1538-7445.am2020-3911] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Current in vitro models of primary liver cancer insufficiently recapitulates the tumor heterogeneity and pathophysiology of the original patient's tumor. This significantly hinders translational studies and often leads to the high rate of clinical trial attrition and poor patient response. Recent technological advances in organoid culture methods have been reported to overcome these limitations. Our group has successfully established 3 patient-derived HCC tumor organoids that closely recapitulate the patient's pathophysiology. Conventional short-term monolayer culture of the same 3 tumors as well as 3 non-tumoral adjacent liver and 3 normal liver organoids were established and compared with 5 HCC cell lines from ATCC for their drug response profiles. Subsequent drug screening was performed using a panel of 100 drugs, of which 70 are FDA-approved for either HCC or other cancers, as well as 30 pipeline compounds targeting frequently mutated pathways in HCC. We found that our screening pipeline could achieve robust z' scores and reproducible data points with technical and biological replicates. Principal component analysis of Total Area under curve (AUC) values show distinct and progressive changes between Normal Liver, Non-tumoral adjacent liver, and Tumor organoids. Upon comparison with HCC cell lines Hep3B, HepG2, Huh7, SNU398 and PLC5, we found HCC patient-derived short term cultures, particularly organoids have more diverse drug sensitivity profiles and may be a better indicator of patient heterogeneity. Interestingly, FDA-approved drugs for HCC such as Regorafenib show high sensitivity and tumor specificity to ATCC cell lines (ATCC vs Normal liver P=0.00017***), but this specificity was reduced and lost in patient-derived 2D cultures (P=0.045*) and organoids (P=0.895), respectively. This may explain the observed hepatotoxicity observed in HCC patients and warrant further investigation of more targeted ways of treating HCC.
Citation Format: Alissa Michelle Go Wong, Winnie Cheung, Maggie Wong, Aikha Wong, Helena Lam, Zhe Zhang, Matthew Man, Hui Chen, David Close, Paul Johnston, Anthony Chan, Paul Lai, Joseph Kwong, Nathalie Wong. High-throughput screening of patient-derived HCC organoids for drug discovery [abstract]. In: Proceedings of the Annual Meeting of the American Association for Cancer Research 2020; 2020 Apr 27-28 and Jun 22-24. Philadelphia (PA): AACR; Cancer Res 2020;80(16 Suppl):Abstract nr 3911.
Collapse
Affiliation(s)
| | - Winnie Cheung
- 1The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Maggie Wong
- 1The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Aikha Wong
- 1The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Helena Lam
- 1The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Zhe Zhang
- 1The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Matthew Man
- 1The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Hui Chen
- 1The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | | | | | - Anthony Chan
- 1The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Paul Lai
- 1The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Joseph Kwong
- 1The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Nathalie Wong
- 1The Chinese University of Hong Kong, Hong Kong, Hong Kong
| |
Collapse
|
11
|
Wan BA, Ganesh V, Zhang L, Sousa P, Drost L, Lorentz J, Vesprini D, Lee J, Rakovitch E, Lu FI, Eisen A, Yee C, Lam H, Chow E. Response to: The Survival Time of 8376 Male Breast Cancer Patients. Clin Oncol (R Coll Radiol) 2018; 30:818-819. [PMID: 30213703 DOI: 10.1016/j.clon.2018.08.011] [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] [Received: 05/27/2018] [Revised: 07/20/2018] [Accepted: 08/21/2018] [Indexed: 11/15/2022]
Affiliation(s)
- B A Wan
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - V Ganesh
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - L Zhang
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - P Sousa
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - L Drost
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - J Lorentz
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - D Vesprini
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - J Lee
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - E Rakovitch
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - F-I Lu
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - A Eisen
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - C Yee
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - H Lam
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - E Chow
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| |
Collapse
|
12
|
Lam H, Katyal N, Parker C, Natteru P, Nattanamai P, Newey CR, Kraus CK. Thromboelastography With Platelet Mapping is Not an Effective Measure of Platelet Inhibition in Patients With Spontaneous Intracerebral Hemorrhage on Antiplatelet Therapy. Cureus 2018; 10:e2515. [PMID: 29942718 PMCID: PMC6015994 DOI: 10.7759/cureus.2515] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Thromboelastography with platelet mapping (TEG-PM) is a modality to measure platelet function, especially in patients taking antiplatelet medications. It consists of two components: arachidonic acid (AA), which is sensitive to aspirin, and adenosine diphosphate (ADP), which is sensitive to clopidogrel. In patients with spontaneous intracerebral hemorrhages (sICH), the clinical interpretation of platelet mapping is unclear. The objective of this study was to evaluate TEG-PM in patients with sICH on aspirin and/or clopidogrel who receive platelet transfusions. This study was an IRB-approved, retrospective case-control study over three years at an academic medical center. Adult patients with sICH were included if they had an admission computed tomography head (CTH) and platelet mapping followed by a repeat platelet mapping and CTH post platelet transfusion. A threshold of 50% inhibition was used as the benchmark for both ADP and AA inhibition. Around 248 subjects with sICH were identified, and 107 were excluded for incomplete documentation, leaving 141 for analysis. Of these, nine met our inclusion criteria. No statistical significance was found on the antithrombotic effects of aspirin or clopidogrel on TEG-PM (p=1.00 for both). Sensitivity and specificity of TEG-PM for clopidogrel was 100% and 42.9%, respectively, and 80% and 0%, respectively, for aspirin. Platelet transfusion did not significantly change AA or ADP inhibition (p=1.00). Hemorrhagic expansion on CTH was not associated with a decrease AA or ADP inhibition (p=1.00). TEG-PM is not an effective measure of platelet inhibition in sICH patients who were on antiplatelet medications and is not a reliable measurement following platelet transfusion.
Collapse
Affiliation(s)
- Helena Lam
- University of Missouri School of Medicine, Columbia, USA
| | - Nakul Katyal
- Department of Neurology, University of Missouri, Columbia, USA
| | | | - Prashant Natteru
- Department of Neurology, University of Mississippi Medical Center, Jackson, USA
| | | | | | - Chadd K Kraus
- Emergency Medicine, Geisinger Health System, Danville, USA
| |
Collapse
|
13
|
Chiang T, Lam H, Quijano R, Donham R, Gilliam P, Heinz L. Static and Dynamic Stresses during Valve Closure of a Bileaflet Mechanical Heart Valve Prosthesis. Int J Artif Organs 2018. [DOI: 10.1177/039139889101401207] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The effect of contact geometry and component compliance on the magnitude, distribution, and state of various types of stresses on a bileaflet mechanical heart valve prosthesis during valve closure was analyzed using an Edwards-Duromedics™ mitral valve as example. Static and dynamic stresses developing on both the leaflet and pivot ball during valve closure were modeled using finite element analysis (FEA). Uniform contact between the leaflet and housing as well as between the pivot ball and pivot slot can significantly reduce both static and dynamic stresses around the contact area. The level of the dynamic flexural stresses can be an order of magnitude higher than that of the static stresses. When both the radial and axial compliance of the housing are taken into consideration, peak dynamic stress was more than 40% less than that generated through the impact between a moving leaflet and a non-compliant rigid housing.
Collapse
Affiliation(s)
- T.H. Chiang
- Baxter Healthcare Corporation-Edwards CVS Division, Irvine, CA
| | - H. Lam
- Baxter Healthcare Corporation-Edwards CVS Division, Irvine, CA
| | - R. Quijano
- Baxter Healthcare Corporation-Edwards CVS Division, Irvine, CA
| | - R. Donham
- PDA Engineering Inc., Costa Mesa, CA - USA
| | - P. Gilliam
- PDA Engineering Inc., Costa Mesa, CA - USA
| | - L.A. Heinz
- PDA Engineering Inc., Costa Mesa, CA - USA
| |
Collapse
|
14
|
Wan BA, Ganesh V, Zhang L, Sousa P, Drost L, Lorentz J, Vesprini D, Lee J, Rakovitch E, Lu FI, Eisen A, Yee C, Lam H, Chow E. Treatment Outcomes in Male Breast Cancer: A Retrospective Analysis of 161 Patients. Clin Oncol (R Coll Radiol) 2018; 30:354-365. [PMID: 29496323 DOI: 10.1016/j.clon.2018.02.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 10/10/2017] [Revised: 12/28/2017] [Accepted: 01/11/2018] [Indexed: 12/31/2022]
Abstract
AIMS Male breast cancer is a rare disease with limited evidence-based guidelines for treatment. This study aimed to identify demographic, pathological and clinical factors associated with its prognosis. MATERIALS AND METHODS A retrospective review of 161 male breast cancer patients diagnosed at a single institution from 1987 to June 2017 was conducted. Patient demographics, disease characteristics, treatment and outcome were extracted and included in competing-risk analysis and the univariate Cox proportional hazard model for univariate analysis. Factors with P < 0.10 were included in multivariable analysis. RESULTS The mean age at diagnosis was 67 years (standard deviation = 11.2) and the median follow-up duration was 5.3 years (range 0-25 years). There were 48 deaths, including 23 cancer-specific deaths. The actuarial median survival was 19.9 years. In multivariable analysis, factors associated with overall survival were size of tumours (hazard ratio 2.0; 95% confidence interval 1.4-2.7, P < 0.0001) and diagnosis of metastatic disease (hazard ratio 8.7; 95% confidence interval 1.9-40.6; P = 0.006). Of 138 patients without metastases at diagnoses, 11 had local-regional recurrence and 26 had distant metastases. In the multivariable model for local-regional recurrence, a more recent year of diagnosis was associated with reduced risk (hazard ratio 0.9, 95% confidence interval 0.8-1.0, P = 0.008), whereas more positive lymph nodes was associated with higher risk (hazard ratio 2.2, 95% confidence interval 1.2-4.0, P = 0.01). A higher risk of metastases was associated with more positive lymph nodes (hazard ratio 1.9; 95% confidence interval 1.1-3.3; P = 0.03) and tumour size (hazard ratio 1.8; 95% confidence interval 1.1-2.9; P = 0.01). A higher risk of any recurrence or metastases was associated with the number of positive nodes (hazard ratio 1.9; 95% confidence interval 1.2-3.0; P = 0.005) and tumour size (hazard ratio 1.6; 95% confidence interval 1.1-2.2; P = 0.01). CONCLUSION In general, tumour size and more positive lymph nodes were associated with worse prognosis. Larger powered studies are needed to identify prognostic factors with smaller effect sizes.
Collapse
Affiliation(s)
- B A Wan
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - V Ganesh
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - L Zhang
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - P Sousa
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - L Drost
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - J Lorentz
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - D Vesprini
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - J Lee
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - E Rakovitch
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - F-I Lu
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - A Eisen
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - C Yee
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - H Lam
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - E Chow
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada.
| |
Collapse
|
15
|
Raman S, Ganesh V, Chan S, Chow R, Hoskin P, Lam H, Wan B, Drost L, DeAngelis C, Chow E. A Review of Practice Patterns and Clinical Guidelines in the Palliative Radiation Treatment of Uncomplicated Bone Metastases. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1862] [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: 11/30/2022]
|
16
|
Morris D, Sherliker P, Clack R, Lam H, Carter J, Halliday A, Bulbulia R, Lewington S. P3230The association of blood glucose and diabetes with peripheral arterial disease involving different vascular territories: results from 628 246 people who attended vascular screening. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3230] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
17
|
Hu M, Lam H, Yeh R, Teeratananon M, Qin YX. Comparison of morphological changes of muscle fibers in response to dynamic electrical muscle contraction and dynamic hydraulic stimulation in a rat hindlimb disuse model. Physiol Res 2017; 66:519-530. [PMID: 28248540 DOI: 10.33549/physiolres.933101] [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] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
This study attempted to compare the muscle fiber morphological responses to dynamic electrical muscle stimulation (DEMS) and dynamic hydraulic stimulation (DHS) in rats under hindlimb suspension (HLS). DEMS at 1 Hz, 50 Hz and 100 Hz for 10 min/day, 5 days/week were introduced to the animals' right quadriceps. Static and 2 Hz DHS were introduced to the right tibiae of other animal groups on a "10 min on - 5 min off - 10 min on" loading regime for 5 days/week. In the end of the 4-week experiments, histological changes in the corresponding soleus, gastrocnemius and quadriceps of the stimulated sites were examined. Compared to age-matched, HLS led to muscle atrophy and strongly reduced muscle wet weights and averaged cross-sectional fiber areas. Among the tested DEMS frequencies, the averaged cross-sectional quadriceps fiber area in the 50 Hz group was 29 % larger than the 100 Hz group. In contrast, difference in the muscle fiber response to the static and 2 Hz DHS was not observed in either soleus or gastrocnemius. Muscle fiber morphological responses to the active DEMS was in a load frequency dependent manner under disuse condition. Relatively passive compressions, either via static or 2Hz DHS, were unable to induce any difference in the muscle fiber responses under functional disuse.
Collapse
Affiliation(s)
- M Hu
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY, USA.
| | | | | | | | | |
Collapse
|
18
|
Wang Y, Liang C, Chou M, Lin Y, Lam H. LOW BODY MASS INDEX IS ASSOCIATED WITH HIGHER COMPLEXITY OF CARE IN OLDEST OLD MEN WITH DYNAPENIA. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.1386] [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: 11/12/2022] Open
Affiliation(s)
- Y. Wang
- Center for Geriatrics and Gerontology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan,
| | - C. Liang
- Center for Geriatrics and Gerontology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan,
- Aging and Health Research Center, Institute of Environmental and Occupational Health Sciences, National Yang-Ming University, Taipei, Taiwan,
- Division of Neurology, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - M. Chou
- Center for Geriatrics and Gerontology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan,
- Aging and Health Research Center, Institute of Environmental and Occupational Health Sciences, National Yang-Ming University, Taipei, Taiwan,
| | - Y. Lin
- Center for Geriatrics and Gerontology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan,
- Division of Neurology, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - H. Lam
- Center for Geriatrics and Gerontology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan,
| |
Collapse
|
19
|
Chou M, Huang T, Liang C, Shen H, Chen H, Liao M, Lin Y, Lam H. DYNAPENIA IS A SIMPLE INDICATOR FOR COMPLEX CARE NEEDS OF OLDER MEN IN VETERANS CARE HOMES IN TAIWAN. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2815] [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: 11/13/2022] Open
Affiliation(s)
- M. Chou
- Center for Geriatrics and Gerontology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan,
- Aging and Health Research Center, National Yang Ming University, Taipei City, N/A, Taiwan,
| | - T. Huang
- Center for Geriatrics and Gerontology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan,
- Department of Family Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, N/A, Taiwan
| | - C. Liang
- Center for Geriatrics and Gerontology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan,
- Aging and Health Research Center, National Yang Ming University, Taipei City, N/A, Taiwan,
| | - H. Shen
- Center for Geriatrics and Gerontology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan,
| | - H. Chen
- Department of Family Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, N/A, Taiwan
| | - M. Liao
- Center for Geriatrics and Gerontology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan,
| | - Y. Lin
- Center for Geriatrics and Gerontology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan,
| | - H. Lam
- Center for Geriatrics and Gerontology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan,
| |
Collapse
|
20
|
Li W, van der Velden J, Raman S, Popovic M, Lam H, Wong K, Ngan R, Burbach M, de Angelis C, McDonald R, Chow E. Prophylaxis of Radiation-Induced Nausea and Vomiting: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1945] [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]
|
21
|
Hong K, Herrmann K, Dybala C, Halseth AE, Lam H, Foreyt JP. Naltrexone/Bupropion extended release-induced weight loss is independent of nausea in subjects without diabetes. Clin Obes 2016; 6:305-12. [PMID: 27477337 PMCID: PMC5129540 DOI: 10.1111/cob.12157] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 05/27/2016] [Accepted: 06/06/2016] [Indexed: 12/28/2022]
Abstract
Naltrexone/bupropion extended release (NB) is indicated as an adjunct to a reduced-calorie diet and increased physical activity for chronic weight management in adults with an initial body mass index of ≥30 or ≥27 kg m(-2) and ≥1 weight-related comorbidity (e.g. hypertension, type 2 diabetes and dyslipidaemia). In phase 3 clinical studies, nausea occurred in significantly higher proportions of subjects randomized to NB vs. placebo (PBO). In this pooled analysis of three phase 3, 56-week, PBO-controlled studies, we characterized nausea and weight loss in NB- and PBO-treated subjects without diabetes. Subjects receiving NB (n = 1778) lost significantly more weight than those receiving PBO (n = 1160). Weight change was not significantly different between subjects reporting and not reporting nausea in either treatment arm. Severity of nausea was mild to moderate in ≥95% of all cases. In the NB arm, the highest incidence of nausea onset (9%) was reported during week 1. The median duration of mild, moderate and severe nausea in subjects receiving NB was 14, 9 and 13 days, respectively. Our results demonstrate that nausea associated with NB is rarely severe, primarily occurs early in treatment and is not a contributor to weight loss.
Collapse
Affiliation(s)
- K Hong
- Center for Clinical Nutrition & Applied Health Research, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
| | - K Herrmann
- US Medical Affairs Department, Takeda Pharmaceuticals USA Inc., Deerfield, IL, USA
| | - C Dybala
- US Medical Affairs Department, Takeda Pharmaceuticals USA Inc., Deerfield, IL, USA
| | - A E Halseth
- Clinical Development Department, Orexigen Therapeutics, La Jolla, CA, USA
| | - H Lam
- Quantitative Science Department, Takeda Development Center Americas Inc., Deerfield, IL, USA
| | - J P Foreyt
- Baylor College of Medicine, Houston, TX, USA
| |
Collapse
|
22
|
Peng Z, Xu WW, Sham Y, Lam H, Sun D, Cheng L, Rasic NF, Guan Q, James AA, Simons FER. Mosquito salivary allergen Aed a 3: cloning, comprehensive molecular analysis, and clinical evaluation. Allergy 2016; 71:621-8. [PMID: 26608594 DOI: 10.1111/all.12812] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2015] [Indexed: 11/26/2022]
Abstract
BACKGROUND Allergic reactions to mosquito bites are an increasing clinical concern. Due to the lack of availability of mosquito salivary allergens, they are underdiagnosed. Here, we reported a newly cloned mosquito Aedes (Ae.) aegypti salivary allergen. METHODS A cDNA encoding a 30-kDa Ae. aegypti salivary protein, designated Aed a 3, was isolated from an expression library. The full-length cDNA was cloned into a baculovirus expression vector, and recombinant Aed a 3 (rAed a 3) was expressed, purified, and characterized. Skin prick tests with purified rAed a 3 and Ae. aegypti bite tests were performed in 43 volunteers. Serum rAed a 3-specific IgE levels were measured in 28 volunteers. RESULTS The primary nucleotide sequence, deduced amino acid sequence, and IgE-binding sites of Aed a 3 were identified. rAed a 3-selected antibodies recognized a 30-kDa Ae. aegypti saliva protein. rAed a 3 bound IgE in mosquito-allergic volunteers and the binding could be inhibited by the addition of natural mosquito extract dose dependently. Immediate skin test reactions to rAed a 3 correlated significantly with mosquito bite-induced reactions. Of the bite test-positive volunteers, 32% had a positive rAed a 3 skin test and 46% had specific IgE. No bite test-negative volunteers reacted to rAed a 3 in either the skin tests or the IgE assays, confirming the specificity of the assay. CONCLUSIONS Aed a 3 that corresponds to the Aegyptin protein is a major mosquito salivary allergen. Its recombinant form has biological activity and is suitable for use in skin tests and specific IgE assays in mosquito-allergic individuals.
Collapse
Affiliation(s)
- Z. Peng
- Department of Pediatrics and Child Health; University of Manitoba; Winnipeg MB Canada
- Department of Immunology; University of Manitoba; Winnipeg MB Canada
| | - W. W. Xu
- Department of Pediatrics and Child Health; University of Manitoba; Winnipeg MB Canada
- Department of Biochemistry and Medical Genetics; University of Manitoba; Winnipeg MB Canada
| | - Y. Sham
- Center for Drug Design; Academic Health Center; University of Minnesota; Minneapolis MN USA
| | - H. Lam
- Department of Pediatrics and Child Health; University of Manitoba; Winnipeg MB Canada
| | - D. Sun
- Department of Pediatrics and Child Health; University of Manitoba; Winnipeg MB Canada
| | - L. Cheng
- Department of Pediatrics and Child Health; University of Manitoba; Winnipeg MB Canada
| | - N. F. Rasic
- Department of Pediatrics and Child Health; University of Manitoba; Winnipeg MB Canada
| | - Q. Guan
- Department of Pediatrics and Child Health; University of Manitoba; Winnipeg MB Canada
- Department of Immunology; University of Manitoba; Winnipeg MB Canada
| | - A. A. James
- Departments of Microbiology & Molecular Genetics and Molecular Biology & Biochemistry; University of California; Irvine CA USA
| | - F. E. R. Simons
- Department of Pediatrics and Child Health; University of Manitoba; Winnipeg MB Canada
- Department of Immunology; University of Manitoba; Winnipeg MB Canada
| |
Collapse
|
23
|
Lam H, Ku G, Wu D, Cheng K, Rivera A, Tumanan-Mendoza B, Alejandria M. Cost-effectiveness analysis of dengue vaccination in the Philippines. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.897] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
|
24
|
Erdmann E, Harding S, Lam H, Perez A. Ten-year observational follow-up of PROactive: a randomized cardiovascular outcomes trial evaluating pioglitazone in type 2 diabetes. Diabetes Obes Metab 2016; 18:266-73. [PMID: 26592506 DOI: 10.1111/dom.12608] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 11/05/2015] [Accepted: 11/15/2015] [Indexed: 11/30/2022]
Abstract
AIMS To conduct a 10-year, observational follow-up of patients completing PROactive to investigate whether trends of cardiovascular benefit with pioglitazone and imbalances in specific malignancies persisted over time. METHODS Macrovascular endpoints and malignancies were compared based on original randomization to pioglitazone or placebo and 'any' versus 'no' pioglitazone use for bladder and prostate cancer. RESULTS Of 4873 patients completing the PROactive trial, 74% entered the follow-up. During follow-up (mean 7.8 years), there were no statistically significant differences in the primary [all-cause mortality, myocardial infarction (MI), cardiac intervention, stroke, major leg amputation, leg revascularization] or main secondary (death, MI, stroke) endpoints for subjects originally randomized to pioglitazone and placebo, except for leg amputations during follow-up [4.1% pioglitazone, 5.6% placebo; hazard ratio 0.74, 95% confidence interval (CI) 0.55-0.99; p = 0.046]. During follow-up, the incidence of total malignancies was similar between groups; bladder cancer was reported in 0.8% of patients (n = 14) in the pioglitazone versus 1.2% (n = 21) in the placebo group [relative risk (RR) 0.65, 95% CI 0.33-1.28], and prostate cancer was reported in 44 men (3.7%) in the pioglitazone versus 29 men (2.5%) in the placebo group (RR 1.47, 95% CI 0.93-2.34). CONCLUSIONS The trends of macrovascular benefits of pioglitazone compared with placebo during PROactive did not persist in the absence of continued pioglitazone during this 10-year follow-up. Trends of decreased bladder cancer and increased prostate cancer were observed in the pioglitazone group during follow-up; however, these imbalances should be interpreted with caution because of the limitations of the observational study design.
Collapse
Affiliation(s)
- E Erdmann
- Medical Clinic III, University of Cologne, Cologne, Germany
| | - S Harding
- Takeda Development Centre, London, UK
| | - H Lam
- Takeda Development Center Americas, Inc., Deerfield, IL, USA
| | - A Perez
- Takeda Development Center Americas, Inc., Deerfield, IL, USA
| |
Collapse
|
25
|
Zhou M, Holden L, Lao N, Lam H, Zeng L, Chow E. Accuracy of Clinicians’ Prediction of Survival and Prognostic Factors Indicative of Survival: a Systematic Review. Hong Kong J Radiol 2013. [DOI: 10.12809/hkjr1313179] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
|
26
|
Poon M, Zeng L, Zhang L, Lam H, Emmenegger U, Wong E, Bedard G, Lao N, Chow R, Chow E. Incidence of skeletal-related events over time from solid tumour bone metastases reported in randomised trials using bone-modifying agents. Clin Oncol (R Coll Radiol) 2013; 25:435-44. [PMID: 23582277 DOI: 10.1016/j.clon.2013.03.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Revised: 02/12/2013] [Accepted: 02/13/2013] [Indexed: 11/26/2022]
Abstract
AIMS Skeletal-related events (SREs) in patients with bone metastases decrease a patient's quality of life and functional status. Although bone-modifying agents have been found to reduce the time to first on-trial SRE and decrease the total incidence of SREs in randomised clinical trials, standard practice in the management of bone metastases has changed concurrently. The purpose of this study was to investigate if advances in bone-targeted therapies have decreased the incidence of individual types of SREs and to delineate the trend of SREs. MATERIALS AND METHODS A literature review was conducted in MEDLINE, EMBASE and the Cochrane Central Register of Controlled Trials to identify phase III, randomised bisphosphonate and other bone-targeted therapy trials from 1980 to September 2011. For all studies, a mean year of enrolment ([start of enrolment + end of enrolment]/2) was calculated. The incidences of SREs were tabulated and expressed as percentages of on-trial patients. Generalised linear mixed models were used to search for the trends of SREs over time for all placebo and intervention arms. Regression coefficients were interpreted as the odds ratio, which was calculated using the exponential of the slope. Ninety-five per cent confidence intervals were also calculated. RESULTS In total, 20 eligible studies were identified that reported SRE data from phase III trials, of which 11 were suitable for the quantitative analysis. Most of the articles included patients with breast cancer and the remaining involved patients with prostate, renal cell, bladder and lung cancer or other solid tumours. Enrolment periods for all included data ranged from 1990 to 2009. Statistically significant overall downward trends in pathological fractures and the need for surgery were seen over time. Also significant differences between intervention and placebo were seen with all SREs. CONCLUSION The decrease in SREs over time may not only be a result of the development of new generation bone-targeted agents, but also due to better systemic management and awareness of events associated with bone metastases.
Collapse
Affiliation(s)
- M Poon
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Chen EZ, Chiu RWK, Sun H, Akolekar R, Chan KCA, Leung TY, Jiang P, Zheng YWL, Lun FMF, Chan LYS, Jin Y, Go ATJI, Lau ET, To WWK, Leung WC, Tang RYK, Au-Yeung SKC, Lam H, Kung YY, Zhang X, van Vugt JMG, Minekawa R, Tang MHY, Wang J, Oudejans CBM, Lau TK, Nicolaides KH, Lo YMD. Noninvasive prenatal diagnosis of fetal trisomy 18 and trisomy 13 by maternal plasma DNA sequencing. PLoS One 2011; 6:e21791. [PMID: 21755002 PMCID: PMC3130771 DOI: 10.1371/journal.pone.0021791] [Citation(s) in RCA: 202] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Accepted: 06/12/2011] [Indexed: 02/05/2023] Open
Abstract
Massively parallel sequencing of DNA molecules in the plasma of pregnant women has been shown to allow accurate and noninvasive prenatal detection of fetal trisomy 21. However, whether the sequencing approach is as accurate for the noninvasive prenatal diagnosis of trisomy 13 and 18 is unclear due to the lack of data from a large sample set. We studied 392 pregnancies, among which 25 involved a trisomy 13 fetus and 37 involved a trisomy 18 fetus, by massively parallel sequencing. By using our previously reported standard z-score approach, we demonstrated that this approach could identify 36.0% and 73.0% of trisomy 13 and 18 at specificities of 92.4% and 97.2%, respectively. We aimed to improve the detection of trisomy 13 and 18 by using a non-repeat-masked reference human genome instead of a repeat-masked one to increase the number of aligned sequence reads for each sample. We then applied a bioinformatics approach to correct GC content bias in the sequencing data. With these measures, we detected all (25 out of 25) trisomy 13 fetuses at a specificity of 98.9% (261 out of 264 non-trisomy 13 cases), and 91.9% (34 out of 37) of the trisomy 18 fetuses at 98.0% specificity (247 out of 252 non-trisomy 18 cases). These data indicate that with appropriate bioinformatics analysis, noninvasive prenatal diagnosis of trisomy 13 and trisomy 18 by maternal plasma DNA sequencing is achievable.
Collapse
Affiliation(s)
- Eric Z. Chen
- Centre for Research into Circulating Fetal Nucleic Acids, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Rossa W. K. Chiu
- Centre for Research into Circulating Fetal Nucleic Acids, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Hao Sun
- Centre for Research into Circulating Fetal Nucleic Acids, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Ranjit Akolekar
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, United Kingdom
| | - K. C. Allen Chan
- Centre for Research into Circulating Fetal Nucleic Acids, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Tak Y. Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Peiyong Jiang
- Centre for Research into Circulating Fetal Nucleic Acids, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yama W. L. Zheng
- Centre for Research into Circulating Fetal Nucleic Acids, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Fiona M. F. Lun
- Centre for Research into Circulating Fetal Nucleic Acids, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Lisa Y. S. Chan
- Centre for Research into Circulating Fetal Nucleic Acids, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yongjie Jin
- Centre for Research into Circulating Fetal Nucleic Acids, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | | | - Elizabeth T. Lau
- Tsan Yuk Hospital, Department of Obstetrics and Gynaecology, University of Hong Kong, Hong Kong SAR, China
| | | | | | | | | | - Helena Lam
- Princess Margaret Hospital, Hospital Authority, Hong Kong SAR, China
| | - Yu Y. Kung
- YY Kung Medical Centre, Hong Kong SAR, China
| | - Xiuqing Zhang
- Joint Chinese University of Hong Kong-Beijing Genomics Institute Genome Research Centre, Li Ka Shing Institute of Health Sciences, Hong Kong SAR, China
- Beijing Genomics Institute at Shenzhen, Shenzhen, China
| | | | - Ryoko Minekawa
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, United Kingdom
| | - Mary H. Y. Tang
- Tsan Yuk Hospital, Department of Obstetrics and Gynaecology, University of Hong Kong, Hong Kong SAR, China
| | - Jun Wang
- Joint Chinese University of Hong Kong-Beijing Genomics Institute Genome Research Centre, Li Ka Shing Institute of Health Sciences, Hong Kong SAR, China
- Beijing Genomics Institute at Shenzhen, Shenzhen, China
| | | | - Tze K. Lau
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Kypros H. Nicolaides
- Harris Birthright Research Centre for Fetal Medicine, King's College Hospital, London, United Kingdom
| | - Y. M. Dennis Lo
- Centre for Research into Circulating Fetal Nucleic Acids, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
- Joint Chinese University of Hong Kong-Beijing Genomics Institute Genome Research Centre, Li Ka Shing Institute of Health Sciences, Hong Kong SAR, China
- * E-mail:
| |
Collapse
|
28
|
Chiu RWK, Akolekar R, Zheng YWL, Leung TY, Sun H, Chan KCA, Lun FMF, Go ATJI, Lau ET, To WWK, Leung WC, Tang RYK, Au-Yeung SKC, Lam H, Kung YY, Zhang X, van Vugt JMG, Minekawa R, Tang MHY, Wang J, Oudejans CBM, Lau TK, Nicolaides KH, Lo YMD. Non-invasive prenatal assessment of trisomy 21 by multiplexed maternal plasma DNA sequencing: large scale validity study. BMJ 2011; 342:c7401. [PMID: 21224326 PMCID: PMC3019239 DOI: 10.1136/bmj.c7401] [Citation(s) in RCA: 504] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
OBJECTIVES To validate the clinical efficacy and practical feasibility of massively parallel maternal plasma DNA sequencing to screen for fetal trisomy 21 among high risk pregnancies clinically indicated for amniocentesis or chorionic villus sampling. DESIGN Diagnostic accuracy validated against full karyotyping, using prospectively collected or archived maternal plasma samples. SETTING Prenatal diagnostic units in Hong Kong, United Kingdom, and the Netherlands. PARTICIPANTS 753 pregnant women at high risk for fetal trisomy 21 who underwent definitive diagnosis by full karyotyping, of whom 86 had a fetus with trisomy 21. Intervention Multiplexed massively parallel sequencing of DNA molecules in maternal plasma according to two protocols with different levels of sample throughput: 2-plex and 8-plex sequencing. MAIN OUTCOME MEASURES Proportion of DNA molecules that originated from chromosome 21. A trisomy 21 fetus was diagnosed when the z score for the proportion of chromosome 21 DNA molecules was >3. Diagnostic sensitivity, specificity, positive predictive value, and negative predictive value were calculated for trisomy 21 detection. RESULTS Results were available from 753 pregnancies with the 8-plex sequencing protocol and from 314 pregnancies with the 2-plex protocol. The performance of the 2-plex protocol was superior to that of the 8-plex protocol. With the 2-plex protocol, trisomy 21 fetuses were detected at 100% sensitivity and 97.9% specificity, which resulted in a positive predictive value of 96.6% and negative predictive value of 100%. The 8-plex protocol detected 79.1% of the trisomy 21 fetuses and 98.9% specificity, giving a positive predictive value of 91.9% and negative predictive value of 96.9%. CONCLUSION Multiplexed maternal plasma DNA sequencing analysis could be used to rule out fetal trisomy 21 among high risk pregnancies. If referrals for amniocentesis or chorionic villus sampling were based on the sequencing test results, about 98% of the invasive diagnostic procedures could be avoided.
Collapse
Affiliation(s)
- Rossa W K Chiu
- Centre for Research into Circulating Fetal Nucleic Acids, Li Ka Shing Institute of Health Sciences, Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Lo TK, Leung WC, Lau WL, Lam H, Lai FK, Ng LS, Wong WC, Chan A, Chin RKH. Rapid aneuploidy test for positive Down screening: who is willing to pay for it? J Matern Fetal Neonatal Med 2010. [DOI: 10.3109/14767050903189016] [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: 11/13/2022]
|
30
|
Abstract
BACKGROUND There is a need to assess neurobehavioral performance of children in developing countries using standardized developmental tools. METHODS The Griffiths Mental Development Scales was evaluated in the Philippines by comparing the performance of 742 Filipino children longitudinally at 6, 12 and 24 months old to those of their British counterparts. RESULTS The mean general and subquotient scores of Filipino children were all within average for age. Comparison with British children showed that except for performance subscales, Filipino children had significantly higher developmental subquotients at 6 months old. As the Filipino infants grew older, their developmental subquotients in all subscales were significantly lower, except for personal and social skills at 24 months old. The genetic predisposition as evidenced by modest maternal scores on the Wechsler Intelligence Scales and lack of familiarity with test materials are factors that may influence the developmental patterns of Filipino children. CONCLUSION Although the performance of the Filipino children in the Griffiths test were within average with age, their performance on developmental subquotients at later ages of 12 and 24 months were significantly lower than British children and may have been influenced by differences in ethnicity, cultural traditions and limited environmental resources.
Collapse
Affiliation(s)
- A Reyes
- Institute of Child Health and Human Development, University of the Philippines, National Institutes of Health, Manila, Philippines.
| | | | | | | | | | | |
Collapse
|
31
|
Lam H, Munzner TM, Rensink RA. The invariance of visual long-term memory to geometric transformation. J Vis 2010. [DOI: 10.1167/6.6.983] [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: 11/24/2022] Open
|
32
|
Qin YX, Lam H, Ferreri S, Rubin C. Dynamic skeletal muscle stimulation and its potential in bone adaptation. J Musculoskelet Neuronal Interact 2010; 10:12-24. [PMID: 20190376 PMCID: PMC4961074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
To identify mechanotransductive signals for combating musculoskeletal deterioration, it is essential to determine the components and mechanisms critical to the anabolic processes of musculoskeletal tissues. It is hypothesized that the interaction between bone and muscle may depend on fluid exchange in these tissues by mechanical loading. It has been shown that intramedullary pressure (ImP) and low-level bone strain induced by muscle stimulation (MS) has the potential to mitigate bone loss induced by disuse osteopenia. Optimized MS signals, i.e., low-intensity and high frequency, may be critical in maintaining bone mass and mitigating muscle atrophy. The objectives for this review are to discuss the potential for MS to induce ImP and strains on bone, to regulate bone adaptation, and to identify optimized stimulation frequency in the loading regimen. The potential for MS to regulate blood and fluid flow will also be discussed. The results suggest that oscillatory MS regulates fluid dynamics with minimal mechanical strain in bone. The response was shown to be dependent on loading frequency, serving as a critical mediator in mitigating bone loss. A specific regimen of dynamic MS may be optimized in vivo to attenuate disuse osteopenia and serve as a biomechanical intervention in the clinical setting.
Collapse
Affiliation(s)
- Y X Qin
- Orthopaedic Bioengineering Research Laboratory, Department of Biomedical Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794-5281, USA.
| | | | | | | |
Collapse
|
33
|
Leonard B, Lam H, Smaill B, LeGrice I. Increased Strain in Interventricular Septum Following Chronic MI in Rats. Heart Lung Circ 2010. [DOI: 10.1016/j.hlc.2010.06.839] [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]
|
34
|
Crossingham G, Sice P, Roberts M, Gale T, Lam H, Anderson I, Carr A, Davies P, Langton J. Improving work place assessments in anaesthesia. Anaesthesia 2010. [DOI: 10.1111/j.1365-2044.2009.06184_9.x] [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]
|
35
|
|
36
|
Adams D, Sice P, Anderson I, Gale T, Lam H, Langton J, Davies P, Carr A. Validation of simulation for recruitment to training posts in anaesthesia. Anaesthesia 2009. [DOI: 10.1111/j.1365-2044.2009.05966_18.x] [Citation(s) in RCA: 2] [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]
|
37
|
Chan KHN, Tang WYM, Hau KC, Lam WY, Lam H, Kwan TH, Lo KK. Nephrogenic systemic fibrosis in a Chinese renal-transplant recipient. Clin Exp Dermatol 2009; 34:244-6. [DOI: 10.1111/j.1365-2230.2008.02764.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
38
|
Lo TK, Leung WC, Lau WL, Lam H, Lai FK, Ng LS, Wong WC, Chan A, Chin RKH. Rapid aneuploidy test for positive Down screening: who is willing to pay for it? J Matern Fetal Neonatal Med 2009; 23:747-9. [DOI: 10.1080/14767050903189016] [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: 10/20/2022]
|
39
|
Abstract
BACKGROUND Subphrenic abscess is rare after cesarean section. METHODS Case report and review of the pertinent world literature CASE REPORT A 22 year-old primigravida underwent a lower-segment cesarean section in the setting of chorioamnionitis, and had a good postoperative recovery initially. Eleven days after surgery, dyspnea and fever prompted a computed tomography scan, which revealed a large subphrenic abscess. The abscess resolved with percutaneous drainage and intravenous antibiotics. A placental swab, baby's skin swab, and abscess aspirate all grew group B Streptococcus. CONCLUSION Although subphrenic abscess is rare in obstetric practice, it should be suspected in patients who remain unwell after chorioamnionitis.
Collapse
Affiliation(s)
- Grace Ying Wong
- Department of Obstetrics and Gynaecology, Princess Margaret Hospital, Hong Kong, Semi-Autonomous Region, China.
| | | |
Collapse
|
40
|
Tiwari A, Chan KL, Fong D, Leung WC, Brownridge DA, Lam H, Wong B, Lam CM, Chau F, Chan A, Cheung KB, Ho PC. The impact of psychological abuse by an intimate partner on the mental health of pregnant women. BJOG 2008; 115:377-84. [PMID: 18190375 PMCID: PMC2253706 DOI: 10.1111/j.1471-0528.2007.01593.x] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Objective The objective of this first population-based study in Hong Kong was to assess the impact of psychological abuse by an intimate partner on the mental health of pregnant women. Design Survey. Setting Antenatal clinics in seven public hospitals in Hong Kong. Population Three thousand two hundred and forty-five pregnant women. Methods The Abuse Assessment Screen (AAS) and demographic questionnaires were administered face-to-face at 32–36 weeks of gestation. At 1 week postpartum, the AAS, Edinburgh Postnatal Depression Scale and SF-12 Health Survey were administered by telephone. Main outcome measures Intimate partner violence, postnatal depression and health-related quality of life. Results Two hundred and ninety six (9.1%) of the participants reported abuse by an intimate partner in the past year. Of those abused, 216 (73%) reported psychological abuse only and 80 (27%) reported physical and/or sexual abuse. Forty six (57.5%) in the physical and/or sexual abuse group also reported psychological abuse. Women in the psychological abuse only group had a higher risk of postnatal depression compared with nonabused women (adjusted OR: 1.84, 95% CI: 1.12–3.02). They were also at a higher risk of thinking about harming themselves (adjusted OR: 3.50, 95% CI: 1.49–8.20) and had significantly poorer mental health-related quality of life (P < 0.001). The higher risks of postnatal depression and thinking of harming themselves were not observed in the physical and/or sexual abuse group although significantly poorer mental health-related quality of life (P < 0.001) was observed. Conclusions Psychological abuse by an intimate partner against pregnant women has a negative impact on their mental health postdelivery. Furthermore, psychological abuse in the absence of physical and/or sexual abuse can have a detrimental effect on the mental health of abused women. The findings underscore the importance of screening pregnant women for abuse by an intimate partner and the need for developing, implementing and evaluating interventions to address psychological abuse. Please cite this paper as: Tiwari A, Chan K, Fong D, Leung W, Brownridge D, Lam H, Wong B, Lam C, Chau F, Chan A, Cheung K, Ho P. The impact of psychological abuse by an intimate partner on the mental health of pregnant women. BJOG 2008;115:377–384.
Collapse
Affiliation(s)
- A Tiwari
- Department of Nursing Studies, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Harcourt M, Lam H, Harcourt S, Flynn M. Discrimination in hiring against immigrants and ethnic minorities: the effect of unionization. The International Journal of Human Resource Management 2008. [DOI: 10.1080/09585190701763958] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
42
|
Leung W, Lau E, Ngai C, Lam H, Leung K, Lee C, Lao T, Tang M. A Prospective Study on the Effect of Rapid Aneuploidy Testing (Amnio-PCR) on Anxiety Levels and Quality of Life Measures in Women and Their Partners with Positive Down Screening Result. Fetal Diagn Ther 2008; 24:165-9. [DOI: 10.1159/000151332] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2007] [Accepted: 05/23/2007] [Indexed: 11/19/2022]
|
43
|
Lo TK, Lau WL, Lai FK, Lam H, Tse HY, Leung WC, Chin RKH. The effect of gestational age on the outcome of second-trimester termination of pregnancies for foetal abnormalities. Prenat Diagn 2008; 28:508-11. [DOI: 10.1002/pd.2012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
44
|
Rearden T, Schwartzberg L, Yee L, Mirtsching B, Charu V, Lam H, Lillie T, Burkes R, Silberstein P. A phase 2 study to evaluate the efficacy of darbepoetin-alfa administered using an extended dose schedule versus weekly dosing in cancer patients with chemotherapy-induced anemia. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.19501] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
19501 Background: Chemotherapy-induced anemia (CIA) can be effectively treated with darbepoetin alfa (DA) using different dosing schedules. Since chemotherapy (CTX) regimens involve various dosing schedules, the ability to synchronize DA dose with CTX could be beneficial. Methods: This phase 2, 25-week (wk), randomized, open-label study compares the efficacy and safety of DA administered using an extended dose schedule (EDS) (every 2 wks [Q2W] or every 3 wks [Q3W]) vs weekly (QW) dosing in patients (pts) with CIA. Pts were randomly assigned to receive DA EDS (either 300 mcg Q2W [with CTX QW, Q2W, or Q4W] or 500 mcg Q3W [with CTX Q3W]) vs 150 mcg DA QW (with CTX QW, Q2W, Q3W, or Q4W). Randomization was stratified by length of CTX cycle, screening hemoglobin (Hb) (< 10 vs = 10 g/dL), and type of cancer (lung/gynecological vs other cancers). The primary endpoint was the change in Hb from baseline (BL) to wk 13; other endpoints included the change in Hb from BL to end of study (EOS), percentage of pts with = 1 transfusion (TFN) from BL to wk 13 and EOS, and safety. Results: Final data for the total 25-wk study period will be presented. Results from a planned interim analysis for all pts who were enrolled in the study and received = 1 dose of DA (n = 752) are shown for wk 13 endpoints (Table). The groups had similar mean change in Hb from BL to wk 13, with a difference (QW minus EDS) (95% CL) of 0.2 (-0.1, 0.4) g/dL. The % pts who achieved target Hb were also similar (difference [95% CL] = 0 [-7, 6]). At the time of the interim analysis, the incidence and types of adverse events were similar between the groups. Ten (3%) EDS and 15 (4%) QW pts had thromboembolic events, 5 (1%) EDS and 2 (1%) QW pts had cerebrovascular accidents, and 19 (5%) EDS and 22 (6%) QW pts had died. Conclusions: This is the first trial synchronizing DA dosing (Q2W and Q3W) with CTX schedules. The interim results suggest that DA administered once per CTX cycle is well-tolerated and efficacious in these patients. [Table: see text] No significant financial relationships to disclose.
Collapse
Affiliation(s)
- T. Rearden
- Hematology and Oncology Consultants, Inc., St Louis, MO; West Clinic, P.C, Memphis, TN; Northwest Medical Specialties, PLLC, Tacoma, WA; Center for Oncology Research and Treatment, Dallas, TX; Pacific Cancer Medical Center, Anaheim, CA; Amgen Inc, Thousand Oaks, CA; Mount Sinai Hospital, Toronto, ON, Canada; Creighton University School of Medicine, Omaha, NE
| | - L. Schwartzberg
- Hematology and Oncology Consultants, Inc., St Louis, MO; West Clinic, P.C, Memphis, TN; Northwest Medical Specialties, PLLC, Tacoma, WA; Center for Oncology Research and Treatment, Dallas, TX; Pacific Cancer Medical Center, Anaheim, CA; Amgen Inc, Thousand Oaks, CA; Mount Sinai Hospital, Toronto, ON, Canada; Creighton University School of Medicine, Omaha, NE
| | - L. Yee
- Hematology and Oncology Consultants, Inc., St Louis, MO; West Clinic, P.C, Memphis, TN; Northwest Medical Specialties, PLLC, Tacoma, WA; Center for Oncology Research and Treatment, Dallas, TX; Pacific Cancer Medical Center, Anaheim, CA; Amgen Inc, Thousand Oaks, CA; Mount Sinai Hospital, Toronto, ON, Canada; Creighton University School of Medicine, Omaha, NE
| | - B. Mirtsching
- Hematology and Oncology Consultants, Inc., St Louis, MO; West Clinic, P.C, Memphis, TN; Northwest Medical Specialties, PLLC, Tacoma, WA; Center for Oncology Research and Treatment, Dallas, TX; Pacific Cancer Medical Center, Anaheim, CA; Amgen Inc, Thousand Oaks, CA; Mount Sinai Hospital, Toronto, ON, Canada; Creighton University School of Medicine, Omaha, NE
| | - V. Charu
- Hematology and Oncology Consultants, Inc., St Louis, MO; West Clinic, P.C, Memphis, TN; Northwest Medical Specialties, PLLC, Tacoma, WA; Center for Oncology Research and Treatment, Dallas, TX; Pacific Cancer Medical Center, Anaheim, CA; Amgen Inc, Thousand Oaks, CA; Mount Sinai Hospital, Toronto, ON, Canada; Creighton University School of Medicine, Omaha, NE
| | - H. Lam
- Hematology and Oncology Consultants, Inc., St Louis, MO; West Clinic, P.C, Memphis, TN; Northwest Medical Specialties, PLLC, Tacoma, WA; Center for Oncology Research and Treatment, Dallas, TX; Pacific Cancer Medical Center, Anaheim, CA; Amgen Inc, Thousand Oaks, CA; Mount Sinai Hospital, Toronto, ON, Canada; Creighton University School of Medicine, Omaha, NE
| | - T. Lillie
- Hematology and Oncology Consultants, Inc., St Louis, MO; West Clinic, P.C, Memphis, TN; Northwest Medical Specialties, PLLC, Tacoma, WA; Center for Oncology Research and Treatment, Dallas, TX; Pacific Cancer Medical Center, Anaheim, CA; Amgen Inc, Thousand Oaks, CA; Mount Sinai Hospital, Toronto, ON, Canada; Creighton University School of Medicine, Omaha, NE
| | - R. Burkes
- Hematology and Oncology Consultants, Inc., St Louis, MO; West Clinic, P.C, Memphis, TN; Northwest Medical Specialties, PLLC, Tacoma, WA; Center for Oncology Research and Treatment, Dallas, TX; Pacific Cancer Medical Center, Anaheim, CA; Amgen Inc, Thousand Oaks, CA; Mount Sinai Hospital, Toronto, ON, Canada; Creighton University School of Medicine, Omaha, NE
| | - P. Silberstein
- Hematology and Oncology Consultants, Inc., St Louis, MO; West Clinic, P.C, Memphis, TN; Northwest Medical Specialties, PLLC, Tacoma, WA; Center for Oncology Research and Treatment, Dallas, TX; Pacific Cancer Medical Center, Anaheim, CA; Amgen Inc, Thousand Oaks, CA; Mount Sinai Hospital, Toronto, ON, Canada; Creighton University School of Medicine, Omaha, NE
| |
Collapse
|
45
|
Yung C, Liu K, Lau WL, Lam H, Leung WC, Chin R. Two cases of postmaturity-related perinatal mortality in non-local expectant mothers. Hong Kong Med J 2007; 13:231-3. [PMID: 17548913] [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: 05/15/2023] Open
Abstract
We present two cases of postmaturity-related perinatal mortality with delivery at 42 weeks 6 days' and 44 weeks' gestation, respectively. No cause beyond postmaturity was found. Neither induction of labour nor foetal monitoring had been performed despite these gestations going post 41 weeks because of a current 'social obstetrics' phenomenon--non-local expectant mothers coming to Hong Kong from mainland China for delivery.
Collapse
Affiliation(s)
- Cherrie Yung
- Department of Obstetrics and Gynaecology, Kwong Wah Hospital, Kowloon, Hong Kong
| | | | | | | | | | | |
Collapse
|
46
|
|
47
|
Lam H, Lo TK, Lau E, Chin R, Tang L. The use of 2- and 3-dimensional sonographic scans in the evaluation of cranial sutures: prenatal diagnosis of Apert syndrome. J Ultrasound Med 2006; 25:1481-4. [PMID: 17060439 DOI: 10.7863/jum.2006.25.11.1481] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Affiliation(s)
- Helena Lam
- Fetal Medicine Unit, Department of Obstetrics and Gynecology, Kwong Wah Hospital, 25 Waterloo Rd, Kowloon, Hong Kong.
| | | | | | | | | |
Collapse
|
48
|
Paquette R, Gabrilove J, Lyons R, Mushtaq C, Sekeres M, Lam H, Dreiling L. Darbepoetin alfa for treating anemia in low-risk myelodysplastic syndrome patients: Interim results after 27/28 weeks. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.6564] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
6564 Background: Patients (pts) with myelodysplastic syndrome (MDS) disorders often develop anemia, resulting in increased transfusions and fatigue. Using the erythropoiesis-stimulating agent (ESA) epoetin alfa to treat anemia in low-risk MDS pts results in an average response rate of 30% (40% when used with G-CSF). Pilot studies suggest that 150 or 300 mcg/week (wk) darbepoetin alfa (DA) can raise hemoglobin (Hb) levels in anemic MDS pts. Methods: This fully enrolled (n = 209), phase 2, single-arm, 52-wk ongoing study is examining DA 500 mcg every 3 weeks (Q3W) for treating anemic pts (Hb ≤ 11 g/dL) with low- or intermediate-risk MDS (IPSS definition). The study’s primary endpoint is the proportion of pts achieving an erythroid response by 13 wks. Other endpoints include the proportion of pts achieving an erythroid response by 27/28 wks and change in both Hb levels and FACT-F scores. Results are stratified by whether pts received ESA therapy before enrollment: ESA-naïve (ESA-N) vs ESA-treated (ESA-T). Results: Previous interim data suggested that low-risk MDS pts can achieve a major erythroid response after 13 wks of DA 500 mcg Q3W. This is the first reported summary of results from a planned interim analysis after 27/28 wks of treatment (n = 129). Of 84 ESA-N pts, 51% were men, 86% were white, and the average (SD) age was 74.1 (9.7) years; the 45 ESA-T pts had similar demographics. During 27/28 wks of treatment, a majority of pts achieved a major erythroid response. ESA-N pts had a mean (SD) 1.2 (1.4) g/dL rise in Hb levels from BL and a clinically significant increase in FACT-F score from BL ( Table ). Of the 129 pts analyzed after 27/28 wks, 83% reported an adverse event (AE) and none reported serious treatment-related AEs or thrombotic events (of 189 pts analyzed after 13 wks, 1 pt reported a serious treatment-related AE). Conclusions: These interim results suggest that DA 500 mcg Q3W is well tolerated and can raise Hb levels in anemic, low-risk MDS pts. Final 27/28-wk data from all enrolled pts (n = 209) will be shown. [Table: see text] [Table: see text]
Collapse
Affiliation(s)
- R. Paquette
- UCLA Oncology Center, Los Angeles, CA; Mt. Sinai School of Medicine, New York, NY; Cancer Care Centers of South Texas, San Antonio, TX; South Carolina Oncology Associates, Columbia, SC; Cleveland Clinic Foundation, Cleveland, OH; Amgen, Inc., Thousand Oaks, CA
| | - J. Gabrilove
- UCLA Oncology Center, Los Angeles, CA; Mt. Sinai School of Medicine, New York, NY; Cancer Care Centers of South Texas, San Antonio, TX; South Carolina Oncology Associates, Columbia, SC; Cleveland Clinic Foundation, Cleveland, OH; Amgen, Inc., Thousand Oaks, CA
| | - R. Lyons
- UCLA Oncology Center, Los Angeles, CA; Mt. Sinai School of Medicine, New York, NY; Cancer Care Centers of South Texas, San Antonio, TX; South Carolina Oncology Associates, Columbia, SC; Cleveland Clinic Foundation, Cleveland, OH; Amgen, Inc., Thousand Oaks, CA
| | - C. Mushtaq
- UCLA Oncology Center, Los Angeles, CA; Mt. Sinai School of Medicine, New York, NY; Cancer Care Centers of South Texas, San Antonio, TX; South Carolina Oncology Associates, Columbia, SC; Cleveland Clinic Foundation, Cleveland, OH; Amgen, Inc., Thousand Oaks, CA
| | - M. Sekeres
- UCLA Oncology Center, Los Angeles, CA; Mt. Sinai School of Medicine, New York, NY; Cancer Care Centers of South Texas, San Antonio, TX; South Carolina Oncology Associates, Columbia, SC; Cleveland Clinic Foundation, Cleveland, OH; Amgen, Inc., Thousand Oaks, CA
| | - H. Lam
- UCLA Oncology Center, Los Angeles, CA; Mt. Sinai School of Medicine, New York, NY; Cancer Care Centers of South Texas, San Antonio, TX; South Carolina Oncology Associates, Columbia, SC; Cleveland Clinic Foundation, Cleveland, OH; Amgen, Inc., Thousand Oaks, CA
| | - L. Dreiling
- UCLA Oncology Center, Los Angeles, CA; Mt. Sinai School of Medicine, New York, NY; Cancer Care Centers of South Texas, San Antonio, TX; South Carolina Oncology Associates, Columbia, SC; Cleveland Clinic Foundation, Cleveland, OH; Amgen, Inc., Thousand Oaks, CA
| |
Collapse
|
49
|
Wong C, Chan W, Lam H, Chan W, Wang L, Ma E. Spectrum of EGFR mutations associated with non-small cell lung cancer in an Asian Chinese population. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.20055] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
20055 Background: Somatic mutations in tyrosine kinase (TK) domain of the EGFR gene, predicting for sensitivity to TK inhibition therapy, are over-represented in lung cancer with adenocarcinoma or bronchioloalveolar histology, non-smokers, female gender and East Asian ethnicity. Methods: We prospectively screened for EGFR mutations at exons 19–21 on micro-dissected specimen enriched for tumor cells by direct nucleotide sequencing in Hong Kong Chinese patients. Results: From May 2005 onwards, a total of 27 patients were analyzed. They comprised 11 males and 16 females with a median age of 67 years. Histological diagnoses were adenocarcinoma (n = 22), bronchioloalveolar carcinoma (n = 4) and squamous cell carcinoma (n = 1). Samples included primary tumor (n = 20) as well as metastatic lesions (n = 7). EGFR mutations were detected in 17 patients (63%), the most common being L858R at exon 21 (n = 7) followed by exon 19 deletions (del(746–750) = 3, del(747–751) = 1, del(747–753) = 3) and G719C at exon 18 (n = 1). Two patients showed novel EGFR mutations, namely 4-base pair insertion deletion at exon 19 leading to substitution of Glu746-Leu747 by Val746-Pro747 and three base pair deletion at exon 18 leading to replacement of Glu709-Thr710 by Asp. Furthermore, two patients showed double mutations, including novel S768I at exon 20 in combination with G719C, and novel K860I at exon 21 in combination with L858R. Finally, one patient showed homozygous del(747–753) as detected by sequencing in both primary lung tumor and brain secondary, which might represent loss of heterozygosity. Conclusions: Similar to other series, two hotspots i.e. exon 19 deletion and L858 account for the majority (82%) of detectable EGFR mutations in our patient population. For the rare and novel variants, it would be of interest to document the clinical responsiveness to TK inhibitors gefitinib and erlotinib, so that a more complete picture of cancer genotype phenotype correlation can be achieved. No significant financial relationships to disclose.
Collapse
Affiliation(s)
- C. Wong
- Hong Kong Sanatorium & Hospital, Hong Kong SAR, Hong Kong Special Administrative Region of China
| | - W. Chan
- Hong Kong Sanatorium & Hospital, Hong Kong SAR, Hong Kong Special Administrative Region of China
| | - H. Lam
- Hong Kong Sanatorium & Hospital, Hong Kong SAR, Hong Kong Special Administrative Region of China
| | - W. Chan
- Hong Kong Sanatorium & Hospital, Hong Kong SAR, Hong Kong Special Administrative Region of China
| | - L. Wang
- Hong Kong Sanatorium & Hospital, Hong Kong SAR, Hong Kong Special Administrative Region of China
| | - E. Ma
- Hong Kong Sanatorium & Hospital, Hong Kong SAR, Hong Kong Special Administrative Region of China
| |
Collapse
|
50
|
Glaspy J, Henry D, Canon JL, Lam H, Lillie T. Darbepoetin alfa administered at varying intervals compared with weekly epoetin alfa for treating chemotherapy-induced anemia: A pooled analysis of 20 clinical trials. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.18508] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
18508 Background: Cancer patients (pts) often develop chemotherapy-induced anemia (CIA), resulting in an increased risk for transfusions and fatigue. The erythropoiesis-stimulating agents (ESAs) epoetin alfa (EA) and darbepoetin alfa (DA) can reduce transfusion requirements, raise hemoglobin (Hb) levels, and decrease fatigue in pts with CIA. The 74-hour half-life of DA allows for flexible dosing with weekly (QW), every-2-week (Q2W), or every-3-week (Q3W) administration. This study evaluated if the dosing interval used to administer DA affected its efficacy. Methods: Data from 20 clinical trials in the CIA setting were pooled, including single-arm, active-controlled, and placebo-controlled trials (a full description of these studies will be presented). Six studies contributed data for DA QW, 7 studies for DA Q2W, and 5 studies for DA Q3W. Controlled studies used either a placebo or EA as the comparator. Logistic regression with treatment as a random effect was used to analyze the clinical trials. Endpoints included the percentage of pts requiring transfusions (from week 1 to end of the treatment period [EOTP] and from week 5 to EOTP), reaching a target Hb of ≥ 11 g/dL, and achieving ≥ 3 point change in FACT-F score from baseline (BL). Percentages were adjusted for BL Hb levels (< 10 vs ≥ 10 g/dL), whether pts received platinum chemotherapy (no vs yes), and for dosage adjustments. Results: The type of ESA used (EA or DA) did not appear to affect the percentage of study pts who achieved clinically meaningful endpoints (see Table ). The results from these analyses also suggest that the dosing interval at which DA was administered did not affect its efficacy in study pts (see Table ). Conclusions: DA administered at dosing intervals of QW, Q2W, or Q3W has comparable efficacy to EA QW. This flexibility allows DA administration to be synchronized with common chemotherapy schedules, which may increase pt convenience by reducing the number of clinic visits. [Table: see text] [Table: see text]
Collapse
Affiliation(s)
- J. Glaspy
- UCLA Medical Center, Los Angeles, CA; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; Centre Hospitalier Notre Dame et Reine Fabiola, Charleroi, Belgium; Amgen, Inc., Thousand Oaks, CA
| | - D. Henry
- UCLA Medical Center, Los Angeles, CA; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; Centre Hospitalier Notre Dame et Reine Fabiola, Charleroi, Belgium; Amgen, Inc., Thousand Oaks, CA
| | - J. L. Canon
- UCLA Medical Center, Los Angeles, CA; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; Centre Hospitalier Notre Dame et Reine Fabiola, Charleroi, Belgium; Amgen, Inc., Thousand Oaks, CA
| | - H. Lam
- UCLA Medical Center, Los Angeles, CA; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; Centre Hospitalier Notre Dame et Reine Fabiola, Charleroi, Belgium; Amgen, Inc., Thousand Oaks, CA
| | - T. Lillie
- UCLA Medical Center, Los Angeles, CA; Pennsylvania Oncology/Hematology Associates, Philadelphia, PA; Centre Hospitalier Notre Dame et Reine Fabiola, Charleroi, Belgium; Amgen, Inc., Thousand Oaks, CA
| |
Collapse
|