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Nguyen TB, Nguyen TTH, Huynh SQ, Phu TV, Taha AM, Nguyen D, Le HM, Nguyen HN, Nguyen LTK, Tran NT. Seroprevalence of Toxocara at Tra Vinh University Hospital in Vietnam. Eur Rev Med Pharmacol Sci 2023; 27:10334-10341. [PMID: 37975357 DOI: 10.26355/eurrev_202311_34308] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
OBJECTIVE The study aims to assess the seroprevalence of Toxocariasis and its associated risk factors among individuals attending the outpatient department at Tra Vinh University Hospital, Vietnam, in 2022. SUBJECTS AND METHODS A cross-sectional survey was conducted among outpatients of Tra Vinh University Hospital. Toxocariasis diagnosis was based on the Enzyme-Linked Immunosorbent Assay (ELISA) performed at the hospital's laboratory department. We assessed the seroprevalence of Toxocariasis and evaluated associated risk factors, including demographics and certain behaviors. RESULTS Of the 249 participants surveyed, 165 tested positive for Toxocariasis, yielding a seroprevalence of 66.3% (95% CI: 60.4-72.1). Multivariate analysis revealed that age groups up to 30 and 30-60 years had higher odds of Toxocariasis infection, with adjusted odds ratios (aOR) of 2.52 (95% CI: 1.04-6.11) and 3.21 (95% CI: 1.44-7.15) respectively. Additionally, individuals residing in rural areas and those in contact with dogs or cats had increased risks, with aORs of 2.21 (95% CI: 1.21-4.01) and 2.04 (95% CI: 1.10-3.79), respectively. Notably, hand washing before eating emerged as a protective factor against Toxocariasis, presenting an aOR of 0.38 (95% CI: 0.19-0.76). CONCLUSIONS Our findings underscore a significant seroprevalence (66.3%) of Toxocara spp. among outpatients at Tra Vinh University Hospital. Proactive measures, including hand hygiene before meals and after pet interactions, are advocated. There is a pronounced need for community-level epidemiological surveillance for human Toxocariasis.
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Affiliation(s)
- T B Nguyen
- Faculty of Medicine and Pharmacy, Tra Vinh University, Tra Vinh, Vietnam.
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Nguyen HN, Stringer LD, Hong KJ. Influence of Irradiation on the Biology of the Brown Marmorated Stink Bug (Hemiptera: Pentatomidae). J Econ Entomol 2021; 114:1211-1218. [PMID: 33730146 DOI: 10.1093/jee/toab026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Indexed: 06/12/2023]
Abstract
Fifth-instar brown marmorated stink bug (Halyomorpha halys Stål) nymphs were treated by gamma-radiation 60Co at different doses of 8-64 Gy to investigate their irradiation biology and potential for the sterile insect technique (SIT). At adult emergence, males were mated with non-irradiated virgin females to assess the longevity of both sexes, female fecundity, and egg sterility. Biological parameters of their F1 progeny were investigated to determine whether negative effects from parental exposure to radiation were inherited. Results showed that irradiation significantly reduced the lifespan of male insects at doses above 20 Gy. Irradiated males did not affect the longevity and fecundity of their female partners, nor of their resulting adult progenies, but it did reduce the developmental duration of nymphs as well as weight gain of male F1 offspring. Egg hatch was significantly reduced at all tested doses and reached complete sterility at 64 Gy. Low hatch of eggs produced by F1 or F1 crossed adults indicated that negative effects from radiation were inherited by the subsequent generation. But F1 male offspring were not less fertile than their irradiated male parent, unlike what was observed in Lepidoptera. The results support the potential for the use of SIT for H. halys management by irradiating the fifth-instar male nymphs at doses from 16 Gy to 64 Gy.
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Affiliation(s)
- H N Nguyen
- Department of Plant Medicine, Sunchon National University, Suncheon, Republic of Korea
- Plant Protection Research Institute, Hanoi, Vietnam
| | - L D Stringer
- The New Zealand Institute for Plant and Food Research Ltd, PB 4704, Christchurch, New Zealand
| | - K-J Hong
- Department of Plant Medicine, Sunchon National University, Suncheon, Republic of Korea
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Triant DA, Le Tourneau JJ, Diesh CM, Unni DR, Shamimuzzaman M, Walsh AT, Gardiner J, Goldkamp AK, Li Y, Nguyen HN, Roberts C, Zhao Z, Alexander LJ, Decker JE, Schnabel RD, Schroeder SG, Sonstegard TS, Taylor JF, Rivera RM, Hagen DE, Elsik CG. Using online tools at the Bovine Genome Database to manually annotate genes in the new reference genome. Anim Genet 2020; 51:675-682. [PMID: 32537769 PMCID: PMC7540445 DOI: 10.1111/age.12962] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/11/2020] [Indexed: 12/16/2022]
Abstract
With the availability of a new highly contiguous Bos taurus reference genome assembly (ARS-UCD1.2), it is the opportune time to upgrade the bovine gene set by seeking input from researchers. Furthermore, advances in graphical genome annotation tools now make it possible for researchers to leverage sequence data generated with the latest technologies to collaboratively curate genes. For many years the Bovine Genome Database (BGD) has provided tools such as the Apollo genome annotation editor to support manual bovine gene curation. The goal of this paper is to explain the reasoning behind the decisions made in the manual gene curation process while providing examples using the existing BGD tools. We will describe the sources of gene annotation evidence provided at the BGD, including RNA-seq and Iso-Seq data. We will also explain how to interpret various data visualizations when curating gene models, and will demonstrate the value of manual gene annotation. The process described here can be applied to manual gene curation for other species with similar tools. With a better understanding of manual gene annotation, researchers will be encouraged to edit gene models and contribute to the enhancement of livestock gene sets.
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Affiliation(s)
- D. A. Triant
- Division of Animal SciencesUniversity of MissouriColumbiaMO65211USA
| | | | - C. M. Diesh
- Department of BioengineeringUniversity of California, BerkeleyBerkeleyCA94720USA
| | - D. R. Unni
- Division of Environmental Genomics and Systems BiologyLawrence Berkeley National LaboratoryBerkeleyCA94608USA
| | - M. Shamimuzzaman
- Division of Animal SciencesUniversity of MissouriColumbiaMO65211USA
| | - A. T. Walsh
- Division of Animal SciencesUniversity of MissouriColumbiaMO65211USA
| | - J. Gardiner
- Division of Animal SciencesUniversity of MissouriColumbiaMO65211USA
| | - A. K. Goldkamp
- Department of Animal and Food SciencesOklahoma State UniversityStillwaterOK74078USA
| | - Y. Li
- Division of Animal SciencesUniversity of MissouriColumbiaMO65211USA
| | - H. N. Nguyen
- Division of Animal SciencesUniversity of MissouriColumbiaMO65211USA
- MU Institute for Data Science and InformaticsUniversity of MissouriColumbiaMO65211USA
| | - C. Roberts
- Division of Animal SciencesUniversity of MissouriColumbiaMO65211USA
| | - Z. Zhao
- Division of Plant SciencesUniversity of MissouriColumbiaMO65211USA
| | - L. J. Alexander
- USDA‐ARS‐PA‐Livestock & Range Research LabMiles CityMT59301USA
| | - J. E. Decker
- Division of Animal SciencesUniversity of MissouriColumbiaMO65211USA
- MU Institute for Data Science and InformaticsUniversity of MissouriColumbiaMO65211USA
| | - R. D. Schnabel
- Division of Animal SciencesUniversity of MissouriColumbiaMO65211USA
- MU Institute for Data Science and InformaticsUniversity of MissouriColumbiaMO65211USA
| | - S. G. Schroeder
- USDA‐ARS Animal Genomics and Improvement LabBeltsvilleMD20705USA
| | | | - J. F. Taylor
- Division of Animal SciencesUniversity of MissouriColumbiaMO65211USA
| | - R. M. Rivera
- Division of Animal SciencesUniversity of MissouriColumbiaMO65211USA
| | - D. E. Hagen
- Department of Animal and Food SciencesOklahoma State UniversityStillwaterOK74078USA
| | - C. G. Elsik
- Division of Animal SciencesUniversity of MissouriColumbiaMO65211USA
- MU Institute for Data Science and InformaticsUniversity of MissouriColumbiaMO65211USA
- Division of Plant SciencesUniversity of MissouriColumbiaMO65211USA
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Nguyen TA, Cuong QN, Kim ALT, Huong TN, Nguyen HN, Fox GJ, Marks GB. Adapting a TB contact investigation strategy for COVID-19. Int J Tuberc Lung Dis 2020; 24:548-550. [PMID: 32398215 DOI: 10.5588/ijtld.20.0169] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- T-A Nguyen
- Woolcock Institute of Medical Research, Hanoi, Viet Nam, Sydney School of Medicine, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Q N Cuong
- Save the Children International, Vientiane Capital, Lao PDR
| | - A L T Kim
- Hanoi University of Public Health, Hanoi, Viet Nam
| | - T N Huong
- Strategic Consultancy Company, Hanoi, Viet Nam
| | - H N Nguyen
- National Hospital for Tropical Diseases, Hanoi, Viet Nam
| | - G J Fox
- Woolcock Institute of Medical Research, Hanoi, Viet Nam, Sydney School of Medicine, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - G B Marks
- Woolcock Institute of Medical Research, Hanoi, Viet Nam, University of New South Wales, Sydney, NSW, Australia, ,
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Chapuis A, Ragnarsson GB, Nguyen HN, Chaney CN, Pufnock JS, Schmitt TM, Duerkopp N, Roberts IM, Pogosov GL, Ho WY, Ochsenreither S, Wölfl M, Bar M, Radich JP, Yee C, Greenberg PD. Transferred WT1-reactive CD8+ T cells can mediate antileukemic activity and persist in post-transplant patients. Sci Transl Med 2013; 5:174ra27. [PMID: 23447018 PMCID: PMC3678970 DOI: 10.1126/scitranslmed.3004916] [Citation(s) in RCA: 256] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Relapse remains a leading cause of death after allogeneic hematopoietic cell transplantation (HCT) for patients with high-risk leukemias. The potentially beneficial donor T cell-mediated graft-versus-leukemia (GVL) effect is often mitigated by concurrent graft-versus-host disease (GVHD). Providing T cells that can selectively target Wilms tumor antigen 1 (WT1), a transcription factor overexpressed in leukemias that contributes to the malignant phenotype, represents an opportunity to promote antileukemic activity without inducing GVHD. HLA-A*0201-restricted WT1-specific donor-derived CD8 cytotoxic T cell (CTL) clones were administered after HCT to 11 relapsed or high-risk leukemia patients without evidence of on-target toxicity. The last four treated patients received CTL clones generated with exposure to interleukin-21 (IL-21) to prolong in vivo CTL survival, because IL-21 can limit terminal differentiation of antigen-specific T cells generated in vitro. Transferred cells exhibited direct evidence of antileukemic activity in two patients: a transient response in one patient with advanced progressive disease and the induction of a prolonged remission in a patient with minimal residual disease (MRD). Additionally, three treated patients at high risk for relapse after HCT survive without leukemia relapse, GVHD, or additional antileukemic treatment. CTLs generated in the presence of IL-21, which were transferred in these latter three patients and the patient with MRD, all remained detectable long-term and maintained or acquired in vivo phenotypic and functional characteristics associated with long-lived memory CD8 T cells. This study supports expanding efforts to immunologically target WT1 and provides insights into the requirements necessary to establish potent persistent T cell responses.
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Affiliation(s)
- A.G. Chapuis
- Program in Immunology, Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, USA
| | - G. B. Ragnarsson
- Program in Immunology, Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, USA
| | - H. N. Nguyen
- Program in Immunology, Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, USA
| | - C. N. Chaney
- Program in Immunology, Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, USA
| | - J. S. Pufnock
- Program in Immunology, Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, USA
| | - T. M. Schmitt
- Program in Immunology, Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, USA
| | - N. Duerkopp
- Program in Immunology, Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, USA
| | - I. M. Roberts
- Program in Immunology, Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, USA
| | | | - W. Y. Ho
- Program in Immunology, Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, USA
| | - S. Ochsenreither
- Program in Immunology, Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, USA
| | - M. Wölfl
- Program in Immunology, Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, USA
| | - M. Bar
- Clinical Research Division, FHCRC, Seattle, WA, USA
| | - J. P. Radich
- Clinical Research Division, FHCRC, Seattle, WA, USA
| | - C Yee
- Program in Immunology, Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, USA
| | - P. D. Greenberg
- Program in Immunology, Fred Hutchinson Cancer Research Center (FHCRC), Seattle, WA, USA
- Department of Immunology, University of Washington, Seattle, WA, USA
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Schallek JB, Nguyen HN, Schwarz C, Williams DR. Non-invasive Adaptive Optics Imaging of Retinal Pericytes and Capillary Blood Velocity in Mice. J Vis 2012. [DOI: 10.1167/12.14.50] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Pehl C, Keller J, Allescher HD, Feussner H, Frieling T, Goebel-Stengel M, Gschossmann J, Kuhlbusch-Zicklam R, Mönnikes H, Nguyen HN, Müller M, Schirra J, Storr M, van der Voort I, Yüce B. [Diagnosis of oesophageal reflux by PH, impedance, and bilirubin measurement: recommendations of the German Society of Neurogastroenterology and of the working group for neurogastroenterology of the German Society for Digestive and Metabolic Diseases]. Z Gastroenterol 2012; 50:1310-32. [PMID: 23225560 DOI: 10.1055/s-0032-1325483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The current recommendations on indications, technical performance, and interpretation of diagnostic techniques for oesophageal reflux update the German recommandations about 24 hour pH measurement of 2003. The recommendations encompass conventional pH measurement, wireless pH measurement, pH and impedance measurements, and bilirubin measurement (duodenogastro-oesophageal reflux).
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Affiliation(s)
- C Pehl
- Medizinische Klinik, Kreiskrankenhaus Vilsbiburg, Vilsbiburg.
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O'Leary T, Heindryckx B, Lierman S, De Sutter P, Shlush K, Fainaru O, Grosman G, Faraji G, Michaeli M, Hallak M, Ellenbogen A, Zambelli F, Magli MC, Stanghellini I, Ferraretti AP, Ventura C, Gianaroli L, Mas A, Cervello I, Gil-Sanchis C, Peris-Pardo L, Faus A, Ferro J, Pellicer A, Simon C, Kobayashi M, Kurotaki Y, Takeuchi T, Yoshida A, Behjati R, Kawai K, Kano J, Akhondi MA, Akaza H, Noguchi M, Desai N, Tsulaia T, Xu J, Anand R, Goldberg J, Falcone T, Eguizabal C, Montserrat N, Vassena R, Barragan M, Garreta E, Garcia-Quevedo L, Vidal F, Giorgetti A, Veiga A, Ispizua-Belmonte JC, Carrasco B, Vassena R, Boada M, Coroleu B, Izpisua JC, Veiga A, Chikhovskaya JV, Repping S, van Pelt AMM, Namm A, Arend A, Aunapuu M, Duggal G, Heindryckx B, O'Leary T, Lierman S, Deforce D, Chuva de Sousa Lopes S, De Sutter P, Koruji M, Janan A, Azizi H, Mirzapour T, Shahverdi A, Baharvand H, Medrano JV, Nguyen HN, Ramathal C, Simon C, Reijo Pera RA, Salit M, Sabry D, Azmy O, Al-Inany H, Montico F, Hetzl AC, Billis A, Favaro WJ, Cagnon VHA, Ben - Yosef D, Amit A, Malcov M, Frumkin T, Eldar I, Mei Raz N, Shwartz T, Azem F, Altarescu G, Beeri B, Varshaver I, Eldar-Geva T, Epsztejn-Litman S, Levy-Lahad E, Eiges R, Sergeev SA, Khramova YV, Kosheleva NV, Saburina IN, Semenova ML. POSTER VIEWING SESSION - STEM CELLS. Hum Reprod 2011. [DOI: 10.1093/humrep/26.s1.93] [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: 11/14/2022] Open
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Mariotti J, Nguyen HN, Engel M. Abstract 3905: Structure–function relationships between RUNX1-MTG fusion proteins and core components of the Notch transcription complex. Cancer Res 2010. [DOI: 10.1158/1538-7445.am10-3905] [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
The myeloid translocation genes (MTG) are preferred targets of chromosomal translocations with the Runx1 gene in acute myeloid leukemia (AML) pathogenesis. The resulting fusion proteins, RUNX1-MTG8 and RUNX1-MTG16, influence gene expression programs that control self-renewal and differentiation in hematopoiesis. How they engage the machinery of self-renewal to alter hematopoietic development is poorly understood. To gain additional insights into this question, we investigated structure–function relationships between RUNX1-MTG fusion proteins and core components of the Notch transcription complex, a critical determinant of cell fate specification in diverse tissues. The Notch transcription complex is composed minimally of the transcriptional repressor CSL, the intracellular domain of Notch receptors (N-ICD) and the transcriptional co-activator Mastermind (MAML). We show that RUNX1-MTG fusion proteins transactivate a Notch-responsive element from the Hes1 promoter. Using MTG16 as a model protein, we show that N-ICDs interact with a discrete domain in the MTG N-terminus. We translated these findings to the fusion proteins and found N-ICD binding was retained by RUNX1-MTGs and a RUNX1-MTG16 mutant that lacks the N1-ICD binding site. In parallel experiments, we defined the binding region for MTG proteins and their fusion protein derivatives on the N1-ICD. Informed by these structural relationships, we utilized RUNX1-MTG proteins or mutants that lack N1-ICD binding sites in transcriptional reporter assays. Our findings suggest that RUNX1-MTG fusion proteins alter transcription of the Notch target gene, Hes1 and intimate a structure–function relationship between RUNX1-MTG fusion proteins and Notch signaling.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 101st Annual Meeting of the American Association for Cancer Research; 2010 Apr 17-21; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2010;70(8 Suppl):Abstract nr 3905.
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Nguyen HN, Martinsson BG, Wagner JB, Carlemalm E, Ebert M, Weinbruch S, Brenninkmeijer CAM, Heintzenberg J, Hermann M, Schuck T, van Velthoven PFJ, Zahn A. Chemical composition and morphology of individual aerosol particles from a CARIBIC flight at 10 km altitude between 50°N and 30°S. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2008jd009956] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Nguyen HN, Domingues GR, Winograd R, Lammert F, Silny J, Matern S. Relationship between bolus transit and LES-relaxation studied with concurrent impedance and manometry. Hepatogastroenterology 2006; 53:218-23. [PMID: 16608028] [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] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
BACKGROUND/AIMS Neuromuscular mechanisms regulating esophageal bolus transport are well studied. However, detailed data about the relationship between bolus transit and lower esophageal sphincter (LES)-relaxation during conventional motility testing are still lacking. METHODOLOGY We performed systematic studies in 25 normal subjects, employing a catheter that integrates the two techniques impedancometry and manometry in a single instrument for simultaneous recording and analysis of the relationship between bolus transit and LES relaxation after swallowing saline or yogurt. RESULTS 195 swallows were analyzed. LES relaxation occurred frequently later than UES relaxation. The mean latency between bolus entry into the esophagus and LES relaxation was 3.6 +0.2 sec. Two types of swallow-induced LES relaxation were observed: (a) LES relaxation preceding bolus transit (46 cases or 24%) and (b) LES relaxation occurring during bolus transit (149 cases or 76%). In the later case, during 114 (76%) cases of this deglutition, the position of the bolus was very close to the LES. CONCLUSIONS During deglutition, LES relaxation seems to be modulated by bolus transit and occurs predominantly upon arrival of the bolus in the distal esophagus.
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Affiliation(s)
- H N Nguyen
- Department of Medicine, Division of Gastroenterology and Helmholtz Institute of Biomedical Engineering University of Technology RWTH-Aachen, Germany.
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Abstract
Detailed data on patterns of esophageal bolus transport in patients with achalasia are still lacking. To study these we applied the novel technique of multichannel intraluminal impedance measurements. Ten patients with achalasia were studied using a 16 channel system. Liquid and semisolid boluses of 10 mL were applied with the patients in a supine position. Patterns of bolus transport were determined and analyzed as compared to results obtained from 20 healthy subjects. The healthy subjects featured a unique typical primary peristalsis pattern independent of bolus viscosity. In contrast, achalasia patients demonstrated different impedance characteristics, including: (i) significantly lower baseline esophageal impedance during the resting state as compared with healthy volunteers (999 omega +/- 108 versus 2749 omega +/- 113); (ii) failed bolus transport through the esophagus in all cases; (iii) impedance evidence of luminal content regurgitation in 35% of the swallows (iv) impedance evidence of pathological air movement within the proximal esophagus during deglutition in 38% of the swallows, so called air trapping. Thus, impedance characteristics of achalasia have been defined and can be attributed to known symptoms of achalasia. They can be used as basic findings for further classification of pathological bolus transports in other esophageal motility disorders.
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Affiliation(s)
- H N Nguyen
- Department of Internal Medicine University Hospital, University of Technology RWTH-Aachen, Germany.
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Nguyen HN, Lalonde P. [Clozapine and pregnancy]. Encephale 2003; 29:119-24. [PMID: 14567163] [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] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
This article reviews the relations between clozapine and pregnancy. Six case reports are identified in the literature of pregnant patients who received clozapine. Novartis at Basle, Switzerland, through its pharmacovigilance and epidemiology, service, has data on nearly 200 cases summarized in this article. We also describe the case of a patient with paranoid schizophrenia who was hospitalized 10 times between the age of 22 to 32. She received clozapine when she was 29 years old and, with a daily dosage of 350 mg, she became asymptomatic. At the age of 33 and 37, she became pregnant and continued clozapine during her 2 pregnancies. During her first pregnancy, she received insulin due to gestational diabetes associated with a body weight mass (BWM) of 30.4 (N = 20 to 25). During her second pregnancy, the BWM was 23.7 and she did not develop diabetes. She delivered at term 2 daughters who are at the time of this report 5 and 3 years old. The two girls are doing well and have no developmental delay. Psychotic symptoms exacerbation: the plasma concentration of clozapine diminishes during pregnancy due to a higher hepatic metabolism and distribution volume. Monitoring plasma concentration of clozapine can help to adjust its dosage. In case of psychotic symptoms exacerbation, the following can be recommended: 1) Increase the clozapine dosage; 2) Add a classic antipsychotic like perphenazine, trifluoperazine or haloperidol. Diabetes: obesity, glucose intolerance or a family history of diabetes are risk factors to develop gestational diabetes. The follow-up of patients, who take an atypical antipsychotic, should include constant monitoring of the blood glucose or Hb1A and lipid dosages. Complications at labor: Clozapine increases the secretion of oxytocine and the contraction of the uterine muscle. But, no studies can explain how clozapine affects the labor exactly. Some case studies report use of forceps, vacuum or cesarean. CONVULSIONS Stoner (1997) described neonatal convulsions 8 days after birth. The mother was receiving 350 mg of clozapine, but also lorazepam and haloperidol during her pregnancy. The newborn withdrawal of lorazepam can increase the risk of convulsions and also haloperidol can diminish the convulsion threshold. Floppy infant syndrome: in the case described by Dimichele (1996), the mother received a daily dosage of 300 mg of clozapine and 2.5 mg of lorazepam 3 to 5 times a day. This can explain hypotonia. Stoner (1997) reports a second case where a mother, who received 600 mg of clozapine during pregnancy, gave birth to a child who had no convulsions neither hypotonia. DEVELOPMENT The cases described concerning studies of children until age 2 to 3 years by Stoner (1997) and Dickson (1998) and until 6 years old by Barnas (1994), do not mention any developmental problem, similar to the two daughters of our patient. The pharmacovigilance service of Novarits reports 6% of malformations. But these reports must be considered with caution since they represent only the pregnancies reported spontaneously to the pharmaceutical company. This is only a portion of all pregnancies associated with clozapine. CONCLUSION No specific risks for the mother and children can be attributed to the use of clozapine during pregnancy. However, the plasma concentration of clozapine is higher in the fetus compared to the mother (Barnas, 1994); therefore, a minimal dosage should be used. Since clozapine is present in the maternal milk, breast feeding should be avoided. The advantages to use clozapine during pregnancy must exceed the risks. It is justified to continue the use of this medication even if data on classic antipsychotics (e.g.: haloperidol) are more extensive. Because the risk of psychotic exacerbation is higher, the substitution of clozapine is not recommended. The psychosocial support and the obstetrical follow-up must be intensive too. An institutional pharmacovigilance service should complement the one provided by the industry. Also, further case-control and cohort studies are essential to better estimate the long-term risks.
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Affiliation(s)
- H N Nguyen
- Hôpital Louis-H. Lafontaine, Montréal, Canada
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Lammert F, Nguyen HN. [Familial hypolipoproteinemia with liver steatosis]. Dtsch Med Wochenschr 2002; 127:1964-5. [PMID: 12239658 DOI: 10.1055/s-2002-34205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- F Lammert
- Medizinische Klinik III, Universitätsklinikum Aachen.
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Ganzera S, Nguyen HN, Wiemann H, Schneider J, Jakubowski HD. [Retroperitoneal giant angiomyolipoma diagnosed post-partum with lymph node involvement]. Dtsch Med Wochenschr 2002; 127:1463-6. [PMID: 12098097 DOI: 10.1055/s-2002-32674] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 10/14/2022]
Abstract
HISTORY AND PRESENTING COMPLAINT A 30-year-old primipara after a normal pregnancy had delivered a 3340 g child. After an uneventful post-partum period she had noticed her abdomen failing to reduce in size. INVESTIGATIONS, DIAGNOSIS AND TREATMENT The abdominal sonography discovered a large retroperitoneal tumor. CT and MRI showed a giant tumor which originated from the right kidney. Suspecting the diagnosis of renal liposarcoma the kidney and tumor were excised with removal of enlarged precaval and preaortal lymph nodes. Gross inspection revealed a ca. 3,2 kg myxoid tumor, measuring 27 x 19 x 10 cm. The histological examination of the surgical preparation revealed a retroperitoneal angiomyolipoma. CONCLUSION This is the first case of a giant retroperitoneal angiomyolipoma with lymph node involvement diagnosed post partum.
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16
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Nguyen HN. [What measures are necessary in the demonstration of Clostridium difficile toxin?]. Dtsch Med Wochenschr 2002; 127:578-9. [PMID: 11894182 DOI: 10.1055/s-2002-22054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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17
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Schönfelder T, Nguyen HN, Lammert F, Busch N, Matern S. [Treatment options for vascular ectasias of the gastric antrum (watermelon stomach)]. Dtsch Med Wochenschr 2001; 126:985-8. [PMID: 11544553 DOI: 10.1055/s-2001-16959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- T Schönfelder
- Medizinische Klinik III, Bundes-Knappschaftskrankenhaus, Bardenberg, Germany
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18
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Lammert F, Nguyen HN, Schönfelder T, Handt S, Matern S. [Diagnosis of vascular ectasias of the gastric antrum (watermelon stomach)]. Dtsch Med Wochenschr 2001; 126:953-6. [PMID: 11523020 DOI: 10.1055/s-2001-16577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- F Lammert
- Medizinische Klinik III, Achen, Germany.
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19
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Nguyen HN, Matern S. [Reference values in patients with daily alcohol consumption]. Dtsch Med Wochenschr 2001; 126:767-8. [PMID: 11455672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III, Universitätsklinikum, RWTH-Aachen, Pauwelstrasse 30 52074 Aachen.
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20
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Nguyen HN, Matern S. [Chronic diarrhea following cholecystectomy]. Dtsch Med Wochenschr 2001; 126:735-6. [PMID: 11446032 DOI: 10.1055/s-2001-15028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III Universitätsklinikum der RWTH Pauwelstrasse 30 52074 Aachen.
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21
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Nguyen HN. [Eradication therapy of Helicobacter pylori in antibiotic resistance]. Dtsch Med Wochenschr 2001; 126:571-2. [PMID: 11402917 DOI: 10.1055/s-2001-13803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III Universitätsklinikum der RWTH-Aachen Pauwelsstrasse 30 52074 Aachen.
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22
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Nguyen HN, Matern S. [Endoscopic monitoring in short segment Barrett esophagus]. Dtsch Med Wochenschr 2001; 126:314-5. [PMID: 11296572 DOI: 10.1055/s-2001-11854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III Universitätsklinikum der RWTH Pauwelstr. 30 52074 Aachen.
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23
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Lammert F, Nguyen HN, Strohbach P, Wylenzek M, Kierdorf HP, Matern S. Therapy of refractory ascites with ultrafiltration and peritoneal reinfusion in a patient with right ventricular dilated cardiomyopathy. Dig Dis Sci 2001; 46:499-503. [PMID: 11318522 DOI: 10.1023/a:1005682728508] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- F Lammert
- Department of Medicine III, University of Technology-RWTH, Aachen, Germany
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24
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Affiliation(s)
- H N Nguyen
- Medizinische Klinik III Universitätsklinikum der RWTH Pauwelstrasse 30 52074 Aachen.
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25
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Affiliation(s)
- H N Nguyen
- Medizinische Klinik III Universitätsklinikum der RWTH Pauwelstrasse 30 52074 Aachen.
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26
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Nguyen HN, Matern S. [Idiopathic chronic pancreatitis]. Dtsch Med Wochenschr 2000; 125:1516. [PMID: 11149215 DOI: 10.1055/s-2000-9117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III, Universitätsklinikum der RWTH, Pauwelstr. 30 52074 Aachen
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27
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Nguyen HN, Matern S. [Finishing treatment with percutaneous endoscopic gastrostomy]. Dtsch Med Wochenschr 2000; 125:1483. [PMID: 11153420 DOI: 10.1055/s-2000-8665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III Universitätsklinikum der RWTH Pauwelstr. 30 52074 Aachen
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Nguyen HN, Tewfik TL, Schloss MD, Frenkiel S, Bernard C. Adenocarcinoma of the paranasal sinuses: two case reports in a child and an adolescent. J Otolaryngol 2000; 29:389-92. [PMID: 11770150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Affiliation(s)
- H N Nguyen
- Department of Otolaryngology, McGill University, Montreal, Quebec
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29
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30
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Nguyen HN. [Clinical significance of Helicobacter pylori: pathogen or saprophyte?]. Dtsch Med Wochenschr 2000; 125:1313-4. [PMID: 11098233 DOI: 10.1055/s-2000-8015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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31
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Purucker E, Nguyen HN, Lammert F, Koch A, Matern S. Central pontine myelinolysis and myocardial infarction following severe hypoglycemia. Intensive Care Med 2000; 26:1406-7. [PMID: 11089780 DOI: 10.1007/s001340000592] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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32
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Nguyen HN. [Lactose intolerance]. Dtsch Med Wochenschr 2000; 125:612. [PMID: 11320723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III Klinikum der Rheinisch-Westfälischen Technischen Hochschule Pauwelsstr. 30 52074 Aachen
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33
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Nguyen HN, Matern S. [Ocular myasthenia gravis and autoimmune thyroiditis]. Dtsch Med Wochenschr 2000; 125:167-8. [PMID: 10700882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III, Universitätsklinikum der RWTH, Aachen
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34
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Nguyen HN. [Undefined periumbilical pain]. Dtsch Med Wochenschr 1999; 124:1437-8. [PMID: 10605427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III, Universitätsklinikum der RWTH, Aachen
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35
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Nguyen HN. [Therapeutic actions in recurrent Helicobacter pylori-positive duodenal ulcer]. Dtsch Med Wochenschr 1999; 124:1220. [PMID: 10572524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III, Universitätsklinikum, Rheinisch-Westfälische Technische Hochschule, Aachen
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36
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Lê DL, Hoeffel CC, Nguyen QK, Nguyen HN. [Gilford progeria. A case report]. Ann Med Interne (Paris) 1999; 150:512-8. [PMID: 10615539] [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] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Hutchinson-Gilford progeria syndrome is a rare syndrome of premature aging with multiple skeletal abnormalities. We report one case. The literature is reviewed. Characteristics of 30 patients with radiological records are presented. Pronounced acro-osteolysis, osteolysis of the clavicle are the main features. Modern imaging is useful to diagnose the complications.
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Affiliation(s)
- D L Lê
- Service de Pédiatrie, Hôpital An Binh Q5, Ho Chi Minh Ville, Vietnam
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37
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Nguyen HN. [Additional drug therapy in acute non-varicose upper gastrointestinal bleeding]. Dtsch Med Wochenschr 1999; 124:980-1. [PMID: 10481759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III des Universitätsklinikum, RWTH-Aachen.
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38
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Nguyen HN, Backes B, Lammert F, Wildberger J, Winograd R, Busch N, Rieband H, Matern S. Long-term survival after diagnosis of hepatic metastatic VIPoma: report of two cases with disparate courses and review of therapeutic options. Dig Dis Sci 1999; 44:1148-55. [PMID: 10389687 DOI: 10.1023/a:1026672022917] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This report describes two patients with pancreatic cholera caused by vasoactive intestinal polypeptide (VIP)-producing tumors, which originated in the pancreas and showed metastases in both hepatic lobes at time of diagnosis. However, the two tumors displayed remarkably disparate clinical courses. Due to the protracted but progressive course over more than 10 years, a multifaceted therapeutic approach was performed to control symptoms and to improve quality of life. The long-acting somatostatin analog octreotide was the most effective treatment for relieving symptoms and correcting fluid and electrolytes disturbances. The effects of complementary treatments, including systemic chemotherapy and hyperselective chemoembolization, as well as concurrent application of octreotide and prednisolone or interferon with respect to clinical symptoms, VIP levels, and tumor growth are reviewed. Our experience, although small, emphasizes the need for an expert, well-planned, adaptive, and multidisciplinary approach in the care of these complex patients.
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Affiliation(s)
- H N Nguyen
- Department of Internal Medicine III, University of Technology RWTH-Aachen, Germany
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Abstract
Cervical cancer is generally a locoregional disease. The endopelvic fascia envelops the cervix in anterior-posterior fashion and serves as a natural barrier. Thus, cervical cancer preferentially grows to the parametria and involves the ureters before it infiltrates the bladder or rectum. Disease stage, grade, cell type, tumor volume, depth of stromal invasion, vascular space invasion, and lymph node status are common prognostic indicators. Irregular vaginal bleeding and discharge are the two most frequent complaints. Although cervical cancer is still staged clinically, data continue to accumulate favoring a conversion to surgical staging to improve accuracy and treatment outcome.
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Affiliation(s)
- H N Nguyen
- Gynecologic Associates, Sheridan Healthcare Corporation, Hollywood, Florida 33021, USA.
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40
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Abstract
Cervical cancer is easily recognized when it presents as a visible lesion, but a problem arises when it adopts unusual presentations. Cervical cancer can develop high in the endocervical canal, beyond the reach of cone biopsy. Copious vaginal discharge from cervical adenocarcinoma may lead to a false-negative Papanicolaou (Pap) smear. Treatment of cervicitis can result in a delay in diagnosis. Successful and timely diagnosis and treatment of cervical cancer requires experience and vigilance. Careful intraoperative palpation of the cervix and uterus can help determine the location and extent of the lesion. Flexibility during surgery is required to utilize intraoperative findings and thus optimize treatment. Pitfalls of cervical cancer diagnosis and treatment with actual case presentations are presented along with other special problems in cervical cancer management such as incidental findings of cervical cancer in hysterectomy specimens, treatment of cervical stump cancers, and unusual cervical cancer cell types.
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Affiliation(s)
- H N Nguyen
- Gynecologic Associates, Sheridan Healthcare Corporation, Hollywood, Florida 33021, USA.
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Abstract
Chemotherapy is used primarily to treat advanced or recurrent cervical cancer. There are three major applications: primary therapy, as a radiation sensitizer, and neoadjuvant therapy. Primary chemotherapy is employed in advanced and disseminated cervical carcinoma (Stage VB). The four best single drugs with moderate activity against cervical cancer are: cisplatin, ifosfamide, dibromodulcitol (mitolactol), and Adriamycin (doxorubicin). Cisplatin and ifosfamide appear to be the best combination therapy: they provide an objective response rate of 33%. However, because the overall survival was not significantly improved with combination therapy, single-agent therapy with one of the above active drugs is acceptable. For stages IIB, III and IVA, the primary therapy is still radiation. Concomitant chemotherapy with hydroxyurea or a combination of cisplatin and 5-fluorouracil (5-FU) have been shown to enhance radiation response in several randomized trials. Hydroxyurea is the preferred radiation sensitizer because it offers less toxicity, ease of administration, and equivalent results. Chemotherapy in neoadjuvant setting produces promising results. Various cisplatin combinations of mitomycin C, 5-FU, vincristine, and bleomycin have been employed to shrink locally advanced cervical cancer and permit safe, radical excision. Early results with these combinations in small trials are encouraging but further studies are needed to fully evaluate their potential.
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Affiliation(s)
- H N Nguyen
- Gynecological Oncology Associates, Sheridan Health Care Corporation, Hollywood, Florida 33021, USA.
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Abstract
The Bethesda Pap Smear system and its 1991 revisions aim to simplify Papanicolaou (Pap) smear reporting and make it more reproducible. It redefines the Pap smear request as a medical consultation. The pathologist consultant is required not only to provide the smear reading but also its clinical recommendation. The Bethesda system insists on a detailed Pap smear report assessing specimen adequacy and types of epithelial changes. Squamous cell abnormalities are grouped according to their biologic potential. Both cervical intraepithelial neoplasia, grade I (CIN I) (mild dysplasia) and human papillomavirus (HPV) lesions are grouped together as low-grade squamous intraepithelial lesions (LGSIL), while moderate and severe dysplasia (CIN II and III) belong to the high-grade squamous intraepithelial lesion (HGSIL) category. Atypical squamous cells of undetermined significance (ASCUS) and atypical glandular cells of undetermined significance (AGCUS) need further qualification as to whether they favor either a reactive or neoplastic process. Guidelines for management of abnormal Pap smears are discussed in detail.
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Affiliation(s)
- H N Nguyen
- Gynecologic Oncology Associates, Sheridan Health Care Corporation, Hollywood, Florida 33021, USA.
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43
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Nguyen HN. [Risk of liver cancer due to peanut butter?]. Dtsch Med Wochenschr 1999; 124:299. [PMID: 10191826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III, Universitätsklinikum der RWTH, Aachen
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44
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Nguyen HN, Matern S. [Modified triple therapies for Helicobacter pylori eradication]. Dtsch Med Wochenschr 1999; 124:271. [PMID: 10102015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III, Universitätsklinikum der RWTH, Aachen.
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Nguyen HN, Silny J, Matern S. Multiple intraluminal electrical impedancometry for recording of upper gastrointestinal motility: current results and further implications. Am J Gastroenterol 1999; 94:306-17. [PMID: 10022621 DOI: 10.1111/j.1572-0241.1999.00847.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review focuses on current aspects of the novel technology of multiple intraluminal electrical impedance measurement. It presents methodological features, summarizes current results, and discusses potential implications for further research. The impedance technique assesses a bolus transport and its associated peristalsis. Validation studies showed a good analogy between physically deduced impedance characteristics and characteristics derived from cineradiography and manometry. From the impedance tracings, it is possible to distinguish between resting states, bolus transit, and wall contraction. Characteristics of a peristaltic wave can be obtained. In human studies, esophageal and small intestinal peristaltic patterns can quantitatively and qualitatively be assessed. A high resolution recording of bolus movements with interesting details of transport and mixing can be obtained. On the basis of several prior characterized impedance tracings duodenal contractile patterns have been classified, and the interdigestive and postprandial states characterized. For reflux evaluation the impedance technique was especially useful for the detection of nonacid gastroesophageal reflux, which is not detectable by pH monitoring. In summary, the main impact of the impedance technique is its capability to characterize esophageal and intestinal chyme transport. Important data on luminal chyme transport have been obtained. This technique is developing into an interesting investigative tool to complement standard techniques for study of upper GI motility, in particular for basic research.
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Affiliation(s)
- H N Nguyen
- Department of Internal Medicine III (Gastroenterology, Hepatology and Endocrinology), University Hospital, University of Technology RWTH-Aachen, Germany
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Nguyen HN, Frank D, Handt S, Rieband HC, Maurin N, Sieberth HG, Matern S. Severe gastrointestinal hemorrhage due to Mycobacterium avium complex in a patient receiving immunosuppressive therapy. Am J Gastroenterol 1999; 94:232-5. [PMID: 9934762 DOI: 10.1111/j.1572-0241.1999.00804.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Intense immunosuppressive therapy is used frequently for treatment of systemic vasculitides, collagenoses, rapidly progressive glomerulonephritis, and after organ transplantation. Numerous serious treatment-related side effects include localized or disseminated opportunistic infections, and require careful monitoring of immunosuppressed patients. Gastrointestinal infections with Mycobacterium avium complex (MAC) or other nontuberculous mycobacteria have been previously identified in HIV seropositive patients only. We now report the first case of an HIV seronegative patient who received immunosuppressive therapy for rapidly progressive glomerulonephritis. The patient presented with severe lower gastrointestinal bleeding and was diagnosed to have ulcerative colitis due to infection with MAC. The patient recovered promptly after administration of antimycobacterial therapy. MAC infection should be included in the differential diagnosis of gastrointestinal bleeding in all immunodeficient patients. The significance of repeated colonoscopy to obtain multiple biopsy specimens with histological examination for foam cells and specific staining for acid-fast organisms is emphasized.
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Affiliation(s)
- H N Nguyen
- Department of Internal Medicine III, (Gastroenterology and Hepatology), University of Technology, RWTH Aachen, Germany
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Nguyen HN. [Budesonide for chronic inflammatory bowel diseases]. Dtsch Med Wochenschr 1998; 123:1258-9. [PMID: 9809049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- H N Nguyen
- Medizinische Klinik III Universitätsklinikum der RWTH Aachen
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Affiliation(s)
- F Lammert
- Medizinische Klinik III, Klinikum, RWTH Aachen
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Lammert F, Busch N, Nguyen HN, Nolte-Ernsting C, Matern S. [Diagnosis of hilar bile duct carcinoma (Klatskin tumor)]. Dtsch Med Wochenschr 1998; 123:1145-8. [PMID: 9793018 DOI: 10.1055/s-2007-1023869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- F Lammert
- Medizinische Klinik III, Klinikum der Rheinisch-Westfälischen Technischen Hochschule Aachen
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Affiliation(s)
- H N Nguyen
- Department of Gynecology, Cleveland Clinic Florida, Ft. Lauderdale, Florida, 33309, USA
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