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Abstract
F-18 FDG PET is increasingly used in the assessment of malignant disease. Normal physiologic activity of FDG can lead to false-positive results. The case of a patient with prior squamous cell carcinoma of the urethra and FDG uptake in the right ovary related to physiological activity during ovulation is presented. Suspicion for physiological ovarian uptake is necessary when assessing PET imaging of females of reproductive age when there is uptake of FDG in the ovarian region. It is therefore important to take a menstrual history and compare PET with cross-sectional imaging in an attempt to exclude physiological causes.
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Chuh A, Wong W, Lee A. The Association of Early Infections and Atopic Dermatitis – A Retrospective Case-control Study in Chinese Children in Primary Care in Hong Kong. J Invest Dermatol 2005. [DOI: 10.1111/j.0022-202x.2005.23877_3.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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178
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Schild S, Wong W, Vora S, Halyard M, Northfelt D, Kogut H, Wheeler R. P-225 The long-term results of a pilot study of three times a dayradiotherapy and escalating doses of daily cisplatin for locally advanced non-small cell lung cancer. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)80719-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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179
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Wong W, Buskirk S, Schild S, Karin P. Salvage brachytherapy and short-term androgen deprivation therapy for locally recurrent prostate cancer after external beam irradiation. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.4788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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180
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Yeol W, Wong W, Wong N, Tse G, Law B, Zhong S. P2 Intensive Hypermethylation of the CpG Island of Ras Association Domain Family 1A (RASSF1A) in tumour and non-tumorous tissue of breast cancer. Breast 2005. [DOI: 10.1016/s0960-9776(05)80041-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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181
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Yan S, Lam K, Mo K, Wong W, Chan W, Lee A. Chiral Acetylenic Sulfoxide in Organic Synthesis: Addition of Chiral Secondary Amines. LETT ORG CHEM 2005. [DOI: 10.2174/1570178053400171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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182
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Cheung PY, Chan CW, Wong W, Cheung TL, Kam KM. Evaluation of two real-time polymerase chain reaction pathogen detection kits for Salmonella spp. in food. Lett Appl Microbiol 2005; 39:509-15. [PMID: 15548303 DOI: 10.1111/j.1472-765x.2004.01609.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To evaluate the LightCycler Salmonella Detection Kit and the TaqMan Salmonella Gold Detection and Quantitation Kit for the real-time PCR detection of Salmonella in various food samples. METHODS AND RESULTS Ready-to-eat foods and raw food samples were artificially contaminated with Salmonella serotypes. In the specificity test, bacterial DNA extracted from sample pre-enrichment culture was analysed with the detection kits performed respectively on the LightCycler Instrument or the ABI Prism 7000 Sequence Detection System. No false-positive or false-negative results were obtained, although the LightCycler system generated invalid PCR results on two occasions. In the sensitivity test using the LightCycler system, Salmonella could be detected in pre-enrichment cultures of 25-g samples inoculated with as low as 1.5 x 10(3) CFU (depending on food type), and false-negative results were obtained for samples with low inoculum levels. CONCLUSIONS Two commercial kits for real-time PCR detection of Salmonella were evaluated. SIGNIFICANCE AND IMPACT OF THE STUDY Evaluation using more food types and matrices, and foods that contain low number of Salmonella or high number of other competing bacteria, is needed before adopting the real-time PCR technique for routine food tests.
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183
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Preuss U, Schultz G, Wong W, Watzke A, Barnow S, Zimmermann J. Current Perspectives in Genetics and Genomics of Alcohol Dependence. Curr Genomics 2004. [DOI: 10.2174/1389202043348733] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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184
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Wagner MM, Espino J, Tsui FC, Gesteland P, Chapman W, Ivanov O, Moore A, Wong W, Dowling J, Hutman J. Syndrome and outbreak detection using chief-complaint data--experience of the Real-Time Outbreak and Disease Surveillance project. MMWR Suppl 2004; 53:28-31. [PMID: 15714623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
Abstract
This paper summarizes the experience of the Real-Time Outbreak and Disease Surveillance (RODS) project in collecting and analyzing free-text emergency department (ED) chief complaints. The technical approach involves real-time transmission of chief-complaint data as Health Level 7 messages from hospitals to a regional data center, where a Bayesian text classifier assigns each chief complaint to one of eight syndrome categories. Time-series algorithms analyze the syndrome data and generate alerts. Authorized public health users review the syndrome data by using Internet interfaces with timelines and maps. Deployments in Pennsylvania, Utah, Atlantic City, and Ohio have demonstrated feasibility of real-time collection of chief complaints. Retrospective experiments that measured case-classification accuracy demonstrated that the Bayesian classifier can discriminate between different syndrome presentations. Retrospective experiments that measured outbreak-detection accuracy determined that the classifier's performance was adequate to support accurate and timely detection of seasonal disease outbreaks. Prospective evaluation revealed that a cluster of carbon monoxide exposures was detected by RODS within 4 hours of the presentation of the first case to an emergency department.
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185
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Wong W, Pockaj B, Halyard M, Gray R, Vora S, Schild S, Apsey H. Integration of intra-operative electron irradiation (IOERT) in breast conserving treatment for T1/T2N0 breast cancer: Early results of a phase II tria. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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186
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Melcher L, Wong W, Sanghera B, Bentzen SM, Hall M, Chambers J, Townsend E, Fountain W, Harrison M. Sequential FDG-PET scanning in the assessment of response to neoadjuvant chemotherapy in operable esophageal cancer. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.4056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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187
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Zhang H, Chan W, Lee A, Xia P, Wong W. Asymmetric 1,3-Dipolar Cycloaddition of Chiral α, β-Unsaturated-γ-Sultams with Nitrile Oxides and Nitrones. LETT ORG CHEM 2004. [DOI: 10.2174/1570178043488644] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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188
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Chan NY, Liem LB, Mok NS, Wong W. Clinical experience of contrast venography guided axillary vein puncture in biventricular pacing R1. Int J Cardiol 2003; 92:55-8. [PMID: 14602217 DOI: 10.1016/s0167-5273(03)00051-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
BACKGROUND AND OBJECTIVES Biventricular pacing is a new modality of treatment for patients with drug-refractory heart failure and ECG evidence of dyssynchronous ventricular contraction. A third lead is required to be placed in a coronary vein through the coronary sinus for left ventricular pacing, in addition to the atrial and right ventricular leads. Subclavian crush phenomenon is associated with lead placement using subclavian puncture. Cephalic venous cutdown, free of this complication, provides vascular access which is probably too small for multiple leads placement in biventricular pacing. Contrast venography guided axillary vein puncture (AP) is an alternative approach. This study reports on clinical experience of this technique in biventricular pacing. METHODS AP is the method of choice for biventricular pacing in Princess Margaret Hospital and Stanford University Medical Center. Patients' clinical characteristics, effectiveness and safety of the technique were analysed. RESULTS AP was performed in 35 patients, 29 male and six female with mean age 57.1 +/- 14.7 years from 1 January 2000 to 30 June 2001. Six patients had biventricular pacing alone and 29 patients had biventricular implantable cardioverter defibrillator (ICD) implanted. Twelve (34.3%) patients have ischaemic cardiomyopathy, 22 (62.9%) patients have dilated cardiomyopathy and one (2.9%) patient has hypertrophic cardiomyopathy. Six (17.1%) patients were in NYHA Class II heart failure, 21 (60.0%) patients were in Class III and eight (22.9%) patients were in Class IV. The mean EF was 23.1 +/- 7.6%. AP was attempted for placement of all three leads in all patients. AP was successful in 34 (97.1%) patients. The single failure was due to small size of the axillary vein. There were no AP, lead or contrast-related complications with a follow up of 12 months. CONCLUSIONS AP is both effective and safe for biventricular pacing. It may be the method of choice in biventricular pacing.
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189
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Wong W, Sivak JG, Moran KL. Optical response of the cultured bovine lens; testing opaque or partially transparent semi-solid/solid common consumer hygiene products. Toxicol In Vitro 2003; 17:785-90. [PMID: 14599478 DOI: 10.1016/s0887-2333(03)00126-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This study determines the relative ocular lens irritancy of 16 common partially transparent or non-transparent consumer hygiene products. The irritancy was found by measuring the changes in the sharpness of focus [referred to as the back vertex distance (BVD) variability] of the cultured bovine lens using a scanning laser In Vitro Assay System. This method consists of a laser beam that scans across the lens, and a computer, which then analyses the average focal length (mm), the BVD variability (mm), and the intensity of the beam transmitted. Lenses were exposed to the 16 hygiene products and the lens' focusing ability was monitored over 192 h. The products are semi-solids or solids (e.g. gels, lotions, shampoos). They are categorized into six groups: shampoos, body washes, lotions, toothpastes, deodorant, and anti-perspirant. Damage (measured by > 1 mm BVD variability) occurred slower for the shampoos, especially in the case of baby shampoo. The results indicate that shampoos exhibit the lowest level of ocular lens toxicity (irritability) while the deodorant is the most damaging.
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190
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Wong W. Intradiscal electrothermal therapy (IDET). JBR-BTR : ORGANE DE LA SOCIETE ROYALE BELGE DE RADIOLOGIE (SRBR) = ORGAAN VAN DE KONINKLIJKE BELGISCHE VERENIGING VOOR RADIOLOGIE (KBVR) 2003; 86:297-9. [PMID: 14651088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
The indications of discography include situations in which there is inconsistency between the imaging and physical findings. Discography may also be performed prior to planned disc therapy such as percutaneous diskectomy or IDET. The diagnostic goal of the diskcogram is to reproduce the patient's original pain pattern by injection of the disc. If it is determined that the origin of the patient's back pain is diskcogenic, disc therapy can be provided by either surgical or non-surgical means. The non-surgical disc therapy includes steroid injections, IDET, or even percutaneous diskectomy.
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191
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Ng PC, So KW, Leung TF, Cheng FWT, Lyon DJ, Wong W, Cheung KL, Fung KSC, Lee CH, Li AM, Hon KLE, Li CK, Fok TF. Infection control for SARS in a tertiary neonatal centre. Arch Dis Child Fetal Neonatal Ed 2003; 88:F405-9. [PMID: 12937045 PMCID: PMC1721604 DOI: 10.1136/fn.88.5.f405] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The Severe Acute Respiratory Syndrome (SARS) is a newly discovered infectious disease caused by a novel coronavirus, which can readily spread in the healthcare setting. A recent community outbreak in Hong Kong infected a significant number of pregnant women who subsequently required emergency caesarean section for deteriorating maternal condition and respiratory failure. As no neonatal clinician has any experience in looking after these high risk infants, stringent infection control measures for prevention of cross infection between patients and staff are important to safeguard the wellbeing of the work force and to avoid nosocomial spread of SARS within the neonatal unit. This article describes the infection control and patient triage policy of the neonatal unit at the Prince of Wales Hospital, Hong Kong. We hope this information is useful in helping other units to formulate their own infection control plans according to their own unit configuration and clinical needs.
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192
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Bomanji JB, Wong W, Gaze MN, Cassoni A, Waddington W, Solano J, Ell PJ. Treatment of neuroendocrine tumours in adults with 131I-MIBG therapy. Clin Oncol (R Coll Radiol) 2003; 15:193-8. [PMID: 12846498 DOI: 10.1016/s0936-6555(02)00273-x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
This is a retrospective review of 131I-MIBG therapy for metastatic neuroendocrine tumours in 25 adult patients. The tumours comprised 17 carcinoids, six paragangliomas, one somatostatinoma and one intestinal smooth muscle sarcoma. All patients (age range 28-84 years) had stage IV disease and a positive diagnostic 123I-MIBG scan. Patients received 11.1 GBq (300 mCi) of 131I-MIBG given in three cycles at 3-monthly intervals. The mean cumulative dose was 27.7 GBq (751 mCi). Symptomatic response was observed in 80%, hormonal response in 55% and tumour response in 48% (WHO criteria). Of the 25 patients, 40% are still under follow-up. Death was due to disease progression in all except one. The median survival time was 48 months from diagnosis of metastatic disease, and 17 months from the last 131I-MIBG therapy. The 5-year survival rate was 59% (95% confidence interval, 34%-78%). There was no statistical difference in survival between previously treated (chemo/radiotherapy) and treatment-naive patients. Side-effects were minimal and commonly include nausea (in the first 24 h) and a transient fall in platelet count. 131I-MIBG provides a good therapeutic response in patients with metastatic neuro-endocrine tumours.
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193
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Trinczek M, Gorelov A, Melconian D, Alford WP, Asgeirsson D, Ashery D, Behr JA, Bricault PG, D'Auria JM, Deutsch J, Dilling J, Dombsky M, Dubé P, Eaton S, Fingler J, Giesen U, Gu S, Häusser O, Jackson KP, Lee B, Schmid JH, Stocki TJ, Swanson TB, Wong W. Novel search for heavy nu mixing from the beta+ decay of 38mK confined in an atom trap. PHYSICAL REVIEW LETTERS 2003; 90:012501. [PMID: 12570603 DOI: 10.1103/physrevlett.90.012501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2002] [Indexed: 05/24/2023]
Abstract
A new technique, full neutrino momentum reconstruction, is used to set limits on the admixture of heavy neutrinos into the electron neutrino. We measure coincidences between nuclear recoils and positrons from the beta decay of trapped radioactive atoms and deduce the neutrino momentum. A search for peaks in the reconstructed recoil time-of-flight spectrum as a function of positron energy is performed. The admixture upper limits range from 4 x 10(-3) to 2 x 10(-2) and are the best direct limits for neutrinos (as opposed to antineutrinos) for the mass region of 0.7 to 3.5 MeV.
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194
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Cathum S, Brown CE, Wong W. Determination of Cr3+, CrO42-, and Cr2O72- in environmental matrixes by high-performance liquid chromatography with diode-array detection (HPLC-DAD). Anal Bioanal Chem 2002; 373:103-10. [PMID: 12012180 DOI: 10.1007/s00216-002-1292-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2002] [Revised: 03/05/2002] [Accepted: 03/12/2002] [Indexed: 10/27/2022]
Abstract
A high-performance liquid chromatographic method with diode array detection (HPLC-DAD), based on chelation with ammonium pyrrolidinedithiocarbamate (APDC), has been developed for the determination of chromium species. Determination of Cr3+, CrO42-, and Cr2O72- was performed for standards and synthetic environmental matrixes. This method is robust, rugged, and can be used for rapid routine determination of chromium species with high precision and reliability. Sample pretreatment is simple. The method is capable of discriminating not only between Cr(III) and Cr(VI) but also between the chemical forms of Cr(VI) - CrO42- and Cr2O72-. By analysis of numerous samples the method has been shown to be selective, sensitive, and free from matrix interference, which is crucial for the determination of chromium species in difficult-to-analyze environmental matrixes. This method has been validated by means of an interlaboratory study. Although different speciation techniques were used during this study, there was good agreement between results from the two laboratories. The method detection limits were 7 and 4 mg L(-1) for Cr3+ and Cr2O72-, respectively. Recoveries of the analytes from spiked samples were 98% and 100% for Cr3+ and Cr2O72-, respectively. Both were based on a 10-mL sample volume spiked with 0.4 mg L(-1) chromium.
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195
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Davis DD, Wong W, Schiff R. Dye laser flash photolysis kinetics study of the reaction of ground-state atomic oxygen with hydrogen peroxide. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100597a033] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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196
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Bomanji JB, Wong W, Gaze MN, Cassoni A, Waddington WA, Solano J. 7. Treatment of neuroendocrine tumours with high dose 131I-MIBG therapy. Nucl Med Commun 2002. [DOI: 10.1097/00006231-200204000-00018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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197
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Abstract
Cerebral vasculitis following acute post-streptococcal glomerulonephritis (APSGN) is a rare neurological complication. An 11-year-old girl with biopsy proven APSGN developed an acute seizure disorder. Clinical and computed tomography findings were consistent with vasculitis.
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198
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Wang J, Chun HJ, Wong W, Spencer DM, Lenardo MJ. Caspase-10 is an initiator caspase in death receptor signaling. Proc Natl Acad Sci U S A 2001; 98:13884-8. [PMID: 11717445 PMCID: PMC61136 DOI: 10.1073/pnas.241358198] [Citation(s) in RCA: 281] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
A role for caspase-10, previously implicated in the autoimmune lymphoproliferative syndrome, in death receptor signaling has not been directly shown. Here we show that caspase-10 can function independently of caspase-8 in initiating Fas- and tumor necrosis factor-related apoptosis-inducing ligand-receptor-mediated apoptosis. Moreover, Fas crosslinking in primary human T cells leads to the recruitment and activation of caspase-10. Fluorescent resonance energy transfer analysis indicates that the death-effector domains of caspase-8 and -10 both interact with the death-effector domain of FADD. Nonetheless, we find that caspase-8 and -10 may have different apoptosis substrates and therefore potentially distinct roles in death receptor signaling or other cellular processes.
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199
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Bhattacharjee A, Richards WG, Staunton J, Li C, Monti S, Vasa P, Ladd C, Beheshti J, Bueno R, Gillette M, Loda M, Weber G, Mark EJ, Lander ES, Wong W, Johnson BE, Golub TR, Sugarbaker DJ, Meyerson M. Classification of human lung carcinomas by mRNA expression profiling reveals distinct adenocarcinoma subclasses. Proc Natl Acad Sci U S A 2001; 98:13790-5. [PMID: 11707567 PMCID: PMC61120 DOI: 10.1073/pnas.191502998] [Citation(s) in RCA: 1639] [Impact Index Per Article: 71.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We have generated a molecular taxonomy of lung carcinoma, the leading cause of cancer death in the United States and worldwide. Using oligonucleotide microarrays, we analyzed mRNA expression levels corresponding to 12,600 transcript sequences in 186 lung tumor samples, including 139 adenocarcinomas resected from the lung. Hierarchical and probabilistic clustering of expression data defined distinct subclasses of lung adenocarcinoma. Among these were tumors with high relative expression of neuroendocrine genes and of type II pneumocyte genes, respectively. Retrospective analysis revealed a less favorable outcome for the adenocarcinomas with neuroendocrine gene expression. The diagnostic potential of expression profiling is emphasized by its ability to discriminate primary lung adenocarcinomas from metastases of extra-pulmonary origin. These results suggest that integration of expression profile data with clinical parameters could aid in diagnosis of lung cancer patients.
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200
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Danzig J, Navarro R, Inami D, Morreale A, Tokayer A, Wong W, Compton J, Page RN, Sweet FB. The treatment of gastroesophageal reflux disease with proton-pump inhibitors and its implications on managed care--clinical overview of gastroesophageal reflux disease. Roundtable discussion. MANAGED CARE INTERFACE 2001; Suppl B:13-20; discussion 24-7, 31-3. [PMID: 11569294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
The importance of gastroesophageal reflux disease (GERD) to managed health care systems cannot be overestimated. It contributes significantly to the use of health care resources, including doctor's services, medication consumption, and diagnostic testing. A roundtable meeting of 13 managed care experts was convened January 23, 2001 in Dallas, to discuss the implications of GERD on the managed care system. The following proceedings are published in five sections. In the first part, Jeffrey Danzig, MD, a gastroenterologist, provides the clinical foundation for the discussion, based on the existing literature and his personal practice.
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