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Sadakane M, Moroi S, Iimuro Y, Izarova N, Kortz U, Hayakawa S, Kato K, Ogo S, Ide Y, Ueda W, Sano T. Stabilization of High-Valence Ruthenium with Silicotungstate Ligands: Preparation, Structural Characterization, and Redox Studies of Ruthenium(III)-Substituted α-Keggin-Type Silicotungstates with Pyridine Ligands, [SiW11O39RuIII(Py)]5−. Chem Asian J 2012; 7:1331-9. [DOI: 10.1002/asia.201100853] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Indexed: 10/14/2022]
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77
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Yoshida Y, Yoshihara K, Nagaoka N, Hayakawa S, Torii Y, Ogawa T, Osaka A, Meerbeek B. Self-assembled Nano-layering at the Adhesive Interface. J Dent Res 2012; 91:376-81. [DOI: 10.1177/0022034512437375] [Citation(s) in RCA: 227] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
According to the ‘Adhesion–Decalcification’ concept, specific functional monomers within dental adhesives can ionically interact with hydroxyapatite (HAp). Such ionic bonding has been demonstrated for 10-methacryloyloxydecyl dihydrogen phosphate (MDP) to manifest in the form of self-assembled ‘nano-layering’. However, it remained to be explored if such nano-layering also occurs on tooth tissue when commercial MDP-containing adhesives (Clearfil SE Bond, Kuraray; Scotchbond Universal, 3M ESPE) were applied following common clinical application protocols. We therefore characterized adhesive-dentin interfaces chemically, using x-ray diffraction (XRD) and energy-dispersive x-ray spectroscopy (EDS), and ultrastructurally, using (scanning) transmission electron microscopy (TEM/STEM). Both adhesives revealed nano-layering at the adhesive interface, not only within the hybrid layer but also, particularly for Clearfil SE Bond (Kuraray), extending into the adhesive layer. Since such self-assembled nano-layering of two 10-MDP molecules, joined by stable MDP-Ca salt formation, must make the adhesive interface more resistant to biodegradation, it may well explain the documented favorable clinical longevity of bonds produced by 10-MDP-based adhesives.
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Sadakane M, Rinn N, Moroi S, Kitatomi H, Ozeki T, Kurasawa M, Itakura M, Hayakawa S, Kato K, Miyamoto M, Ogo S, Ide Y, Sano T. Preparation and StructuralCharacterization of RuII-DMSO and RuIII-DMSO-substituted α-Keggin-type Phosphotungstates, [PW11O39RuIIDMSO]5- and [PW11O39RuIIIDMSO]4-, and Catalytic Activity for Water Oxidation. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.201100213] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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79
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Sumikama T, Yoshinaga K, Watanabe H, Nishimura S, Miyashita Y, Yamaguchi K, Sugimoto K, Chiba J, Li Z, Baba H, Berryman JS, Blasi N, Bracco A, Camera F, Doornenbal P, Go S, Hashimoto T, Hayakawa S, Hinke C, Ideguchi E, Isobe T, Ito Y, Jenkins DG, Kawada Y, Kobayashi N, Kondo Y, Krücken R, Kubono S, Lorusso G, Nakano T, Kurata-Nishimura M, Odahara A, Ong HJ, Ota S, Podolyák Z, Sakurai H, Scheit H, Steiger K, Steppenbeck D, Takano S, Takashima A, Tajiri K, Teranishi T, Wakabayashi Y, Walker PM, Wieland O, Yamaguchi H. Structural evolution in the neutron-rich nuclei ¹⁰⁶Zr and ¹⁰⁸Zr. PHYSICAL REVIEW LETTERS 2011; 106:202501. [PMID: 21668223 DOI: 10.1103/physrevlett.106.202501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Indexed: 05/30/2023]
Abstract
The low-lying states in ¹⁰⁶Zr and ¹⁰⁸Zr have been investigated by means of β-γ and isomer spectroscopy at the radioactive isotope beam factory (RIBF), respectively. A new isomer with a half-life of 620 ± 150 ns has been identified in ¹⁰⁸Zr. For the sequence of even-even Zr isotopes, the excitation energies of the first 2⁺ states reach a minimum at N = 64 and gradually increase as the neutron number increases up to N = 68, suggesting a deformed subshell closure at N = 64. The deformed ground state of ¹⁰⁸Zr indicates that a spherical subshell gap predicted at N = 70 is not large enough to change the ground state of ¹⁰⁸Zr to the spherical shape. The possibility of a tetrahedral shape isomer in ¹⁰⁸Zr is also discussed.
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Yoshihara K, Yoshida Y, Hayakawa S, Nagaoka N, Torii Y, Osaka A, Suzuki K, Minagi S, Van Meerbeek B, Van Landuyt K. Self-etch Monomer-Calcium Salt Deposition on Dentin. J Dent Res 2011; 90:602-6. [DOI: 10.1177/0022034510397197] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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81
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Nishimura S, Li Z, Watanabe H, Yoshinaga K, Sumikama T, Tachibana T, Yamaguchi K, Kurata-Nishimura M, Lorusso G, Miyashita Y, Odahara A, Baba H, Berryman JS, Blasi N, Bracco A, Camera F, Chiba J, Doornenbal P, Go S, Hashimoto T, Hayakawa S, Hinke C, Ideguchi E, Isobe T, Ito Y, Jenkins DG, Kawada Y, Kobayashi N, Kondo Y, Krücken R, Kubono S, Nakano T, Ong HJ, Ota S, Podolyák Z, Sakurai H, Scheit H, Steiger K, Steppenbeck D, Sugimoto K, Takano S, Takashima A, Tajiri K, Teranishi T, Wakabayashi Y, Walker PM, Wieland O, Yamaguchi H. β-decay half-lives of very neutron-rich Kr to Tc isotopes on the boundary of the r-process path: an indication of fast r-matter flow. PHYSICAL REVIEW LETTERS 2011; 106:052502. [PMID: 21405387 DOI: 10.1103/physrevlett.106.052502] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Indexed: 05/30/2023]
Abstract
The β-decay half-lives of 38 neutron-rich isotopes from (36)Kr to (43)Tc have been measured; the half-lives of (100)Kr, (103-105)Sr, (106-108)Y, (108-110)Zr, (111,112)Nb, (112-115)Mo, and (116,117)Tc are reported here. The results when compared with previous standard models indicate an overestimation in the predicted half-lives by a factor of 2 or more in the A≈110 region. A revised model based on the second generation gross theory of β decay better predicts the measured half-lives and suggests a more rapid flow of the rapid neutron-capture process (r-matter flow) through this region than previously predicted.
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82
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Motoyoshi I, Hayakawa S. Adaptation-induced blindness. J Vis 2010. [DOI: 10.1167/8.6.238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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83
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Shirosaki Y, Tsuru K, Hayakawa S, Nakamura Y, Gibson IR, Osaka A. Effects of Si(IV) Released from Chitosan-Silicate Hybrids on Proliferation and Differentiation of MG63 Osteoblast Cells. ACTA ACUST UNITED AC 2010. [DOI: 10.4303/bda/d110112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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84
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Hasegawa H, Iwasaki N, Suzuki A, Maki T, Hayakawa S. Distributions of Trace Elements in Biogenic Carbonate Minerals of Precious Corals by X-ray Fluorescence Analysis. BUNSEKI KAGAKU 2010. [DOI: 10.2116/bunsekikagaku.59.521] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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85
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Uzawa A, Mori M, Hayakawa S, Masuda S, Kuwabara S. Different responses to interferon beta-1b treatment in patients with neuromyelitis optica and multiple sclerosis. Eur J Neurol 2009; 17:672-6. [PMID: 20039942 DOI: 10.1111/j.1468-1331.2009.02897.x] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Although the benefit of treatment for relapsing-remitting multiple sclerosis (MS) is firmly established, whether interferon beta-1b (IFNB-1b) therapy is efficacious for neuromyelitis optica (NMO) has been debated. METHODS We reviewed the responses to IFNB-1b treatment in 18 patients with relapsing NMO and compared the results with those from 38 patients with relapsing-remitting MS. We compared clinical characteristics, the annualized relapse rate (ARR) and the probability of being relapse free before and after IFNB-1b treatment in patients with NMO and MS. RESULTS The proportion of patients with more than 50% increase in the ARR after IFNB-1b treatment was much higher in NMO than in MS (P = 0.046). ARR was significantly lower in patients with MS after IFNB-1b administration than before (P = 0.015), but not in NMO. Kaplan-Meier and log-rank statistical analyses revealed that relapse-free rates were lower in NMO than MS after IFNB-1b treatment (P = 0.032). The analyses also showed lower relapse-free rates during the pre-IFNB-1b treatment period than the post-IFNB-1b treatment period in MS (P < 0.001), but not in NMO. CONCLUSION IFNB-1b treatment does not appear to be effective for preventing relapse in NMO likely because of differences between the immune-pathogenesis of NMO and MS.
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86
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Asaoka S, Yamamoto T, Kondo S, Hayakawa S. Removal of hydrogen sulfide using crushed oyster shell from pore water to remediate organically enriched coastal marine sediments. BIORESOURCE TECHNOLOGY 2009; 100:4127-32. [PMID: 19394819 DOI: 10.1016/j.biortech.2009.03.075] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2009] [Revised: 03/29/2009] [Accepted: 03/30/2009] [Indexed: 05/09/2023]
Abstract
Hydrogen sulfide is highly toxic and fatal to benthic organisms as well as causing depletion of dissolved oxygen and generating blue tide in eutrophic coastal seas. The purposes of this study are to reveal adsorption characteristics of hydrogen sulfide onto crushed oyster shell, and to evaluate removal efficiency of hydrogen sulfide from pore water in organically enriched sediments using container experiment in order to develop a coastal sediment amendment. The crushed oyster shell was mainly composed of CaCO(3) with calcite and CaO crystal phase. The batch experiment showed removal kinetics of hydrogen sulfide can be expressed as the first order equation and Langmuir plot fitted well in describing the adsorption behavior with the adsorption maximum at 12 mg-S g(-1). The container experiments suggested the oyster shell adsorbs hydrogen sulfide in pore water effectively and reduces oxygen consumption in the overlying water. Furthermore, oxidation-reduction potential of the sediment was higher with addition of crushed oyster shell than the control without oyster shell. Thus, it is concluded that crushed oyster shell can be an effective amendment to remediate organically enriched sediments in eutrophic coastal seas.
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87
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Inoue∗ Y, Ohba Y, Kobayashi Y, Komori M, Hayakawa S, Matsui T. Determination of Plasma Concentrations of Vitamin K Homologues in Thoroughbred Horses. J Equine Vet Sci 2009. [DOI: 10.1016/j.jevs.2009.04.096] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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88
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Kanno H, Miyata K, Hayakawa S, Kajiwara K. Vitrification of emulsified dilute aqueous sucrose solutions at high pressures. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.10.050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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89
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Hayakawa S, Hajima Y, Qiao S, Namatame H, Hirokawa T. Characterization of calcium carbonate polymorphs with Ca K edge X-ray absorption fine structure spectroscopy. ANAL SCI 2008; 24:835-837. [PMID: 18614821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Ca K edge X-ray absorption fine structure (XAFS) spectroscopy was utilized for the characterization and quantification of calcium carbonate polymorphs and their mixtures. The advantage of the XAFS is the small sample quantity required for measurements, and a flexible sample environment. The near-edge XAFS spectra of calcite, aragonite and vaterite were measured with the conversion electron yield (CEY) method, and the obtained spectra showed characteristic features that can be utilized as fingerprints. The quantification of mixed polymorphs was examined by using a linear combination fitting of reference XAFS spectra. Though the quality of the fits was satisfactory, discrepancies in the evaluated values were observed between those with X-ray diffraction (XRD) and XAFS. The nonuniformity of samples may be enhanced by the surface sensitivity of the CEY method.
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90
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Hayakawa S. Expanding X-ray analysis. ANAL SCI 2008; 24:829. [PMID: 18614819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
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91
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Gasquères G, Bonhomme C, Maquet J, Babonneau F, Hayakawa S, Kanaya T, Osaka A. Revisiting silicate substituted hydroxyapatite by solid-state NMR. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2008; 46:342-346. [PMID: 18306175 DOI: 10.1002/mrc.2109] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Silicon-substituted hydroxyapatite (Si-HAp) has shown promising properties such as high-bone remodeling around implants. So far, the techniques used for the structural characterization of the Si-HAp have given indirect evidence of the presence of silicon inside the structure (by X-ray and neutron diffraction). In this paper, we focus on Si-HAp derivatives obtained by a precipitation method (widely described in the literature). We demonstrate here by solid-state NMR spectroscopy that only a fraction of the silicon atoms are incorporated into the HAp lattice in the form of Q(0) (SiO(4) (4-)) species, for 4.6 wt% Si-HAp. A large amount of silicate units are located outside the HAp structure and correspond to silica-gel units. All results were established through (29)Si MAS, (1)H -->(29)Si CP MAS and T(1)rho((1)H) edited (1)H -->(29)Si CP MAS experiments. This last pulse scheme acted as a powerful editing sequence, leading to unambiguous spectroscopic conclusions, concerning the location of the SiO(4) (4-) moieties.
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92
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Ma CJ, Tohno S, Kasahara M, Hayakawa S. Elemental distribution in individual rain droplets determined by a combination of the replication method and the synchrotoron radiation X-ray fluorescence microprobe technique. ANAL SCI 2007; 22:415-9. [PMID: 16733314 DOI: 10.2116/analsci.22.415] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The main objective of the present study is to specify the chemical properties of individual rain droplets. For this purpose, we have combined the collodion replication method and the SR-XRF microprobe technique. The dry residual materials retained in a single rain droplet, which correspond to the former cloud condensation nuclei and the scavenged particles during droplet falling, were successively reconstructed by the multiple elemental maps using SR-XRF microprobe analytical system. Also the SR-XRF microprobe system allows us to quantify the masses of ultra trace elements in residues of individual rain droplet with fg level. The proposed combination method in the present study is found to be helpful to understand the physicochemical properties of individual rain droplets.
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93
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Carter AM, Croy BA, Dantzer V, Enders AC, Hayakawa S, Mess A, Soma H. Comparative Aspects of Placental Evolution: A Workshop Report. Placenta 2007; 28 Suppl A:S129-32. [PMID: 17350679 DOI: 10.1016/j.placenta.2007.01.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2007] [Accepted: 01/24/2007] [Indexed: 11/28/2022]
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94
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Tanaka Y, Taniguchi Y, Tanaka D, Toyoda M, Ishii H, Tanabe T, Terada Y, Hayakawa S, Kawai J. Investigation of individual micrometer-size Kosa particle with on-site combination of electron microscope and synchrotron X-ray microscope. ANAL SCI 2007; 21:839-43. [PMID: 16038506 DOI: 10.2116/analsci.21.839] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The Kosa (yellow sand) aerosol affects the global environment as well as human health because it migrates from the interior of China to other areas, absorbing various atmospheric elements. Investigation into individual Kosa aerosol particles, which are submicroscopic to several tens of micrometers in diameter, is required to resolving the issue. We installed a scanning electron microscope (SEM) equipped with an energy dispersive X-ray spectrometer (EDX) on a synchrotron radiation (SR) beam line and introduced the SR beam into the SEM chamber for combinatorial application of SEM-EDX and SR X-ray fluorescence (SR-XRF) spectrometry to individual particles. It should be noted that detailed topographic observation by SEM and sensitive elemental analysis by SR-XRF, both crucial for individual particle measurement but which previously had to be carried out separately, were jointly performed inside the SEM chamber in this setup. Here, we show that SR-XRF results, in conjunction with SEM images, contributed toward resolving individual particle dispositions. Atmospheric sulfur primarily adheres to calcium in the aerosol particles and the particle surface roughens as a consequence of the chemical reaction between the two elements.
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95
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Kawai J, Takagawa K, Fujisawa S, Ektessabi A, Hayakawa S. MICROBEAM XANES AND X-RAY FLUORESCENCE ANALYSIS OF CADMIUM IN KIDNEY. ACTA ACUST UNITED AC 2007. [DOI: 10.1081/tma-100107589] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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96
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Hayakawa S. Microbial transformation of bile acids. A unified scheme for bile acid degradation, and hydroxylation of bile acids. J Basic Microbiol 2007. [DOI: 10.1002/jobm.19820220505] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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97
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Fukegawa D, Hayakawa S, Yoshida Y, Suzuki K, Osaka A, Van Meerbeek B. Chemical interaction of phosphoric acid ester with hydroxyapatite. J Dent Res 2006; 85:941-4. [PMID: 16998137 DOI: 10.1177/154405910608501014] [Citation(s) in RCA: 190] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Among functional monomers used in contemporary dental adhesives, 10-methacryloyloxydecyl dihydrogen phosphate (MDP) has been found to interact chemically with hydroxyapatite (HAp) most intensively and stably. This effect was thought to be the basis of the superior bonding effectiveness of MDP-based self-etch adhesives to enamel/dentin. To elucidate fully the chemical interaction and reactivity of MDP with HAp, we used (31)P CP-MAS NMR spectroscopy and powder x-ray diffraction. In an aqueous ethanol solution, Ca ions were leached from HAp to form, at short term, a MDP-calcium salt (CaMHP(2)) layered structure on the HAp surface. When MDP was allowed to interact for longer time (< 24 hrs), CaHPO(4).2H(2)O precipitated on top of this MDP-calcium salt layered structure. In conclusion, the intense chemical interaction of MDP with HAp must be ascribed to superficial dissolution of HAp induced by the MDP adsorption and subsequent deposition of MDP-calcium salt with a solubility lower than that of CaHPO(4).2H(2)O.
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98
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Tohno S, Ma CJ, Hayakawa S, Yamasaki S, Kasahara M. Analysis for chemical characterization of atmospheric aerosols application of X-ray microprobe system and double thin film method. ENVIRONMENTAL MONITORING AND ASSESSMENT 2006; 120:575-84. [PMID: 16741794 DOI: 10.1007/s10661-005-9104-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2005] [Accepted: 11/04/2005] [Indexed: 05/09/2023]
Abstract
The X-ray microprobe system was applied to ultra trace characterization of single Kosa aerosols and non-Kosa aerosols simultaneously collected at Yasaka, Japan and TaeAnn, Korea. We demonstrated remarkable mass increase of heavy metals as well as soil components in individual particles during the Kosa event compared with the non-Kosa period at Yasaka. Backward trajectory analysis suggested that the Kosa samples were in the mixing state of mineral components and anthropogenic heavy elements. Double thin film method was applied to investigate the seasonal change of the mixing states of single sea-salt aerosols associated with chlorine loss due to the heterogeneous reactions between sea-salt particles and acidic gases. It was revealed that the percentages of both chloride-nitrate mixed particles and sulfate-nitrate ones were larger in wintertime than those in summertime and fraction of chloride-nitrate mixed particles increased with an increase of particle size. Comparison between the size-segregated bulk analysis and the single particle analysis demonstrated that remarkable chloride depletion occurred in coarse particles sampled on May in the former analysis, while chloride depletion in coarse particles was not marked in the latter analysis. The discrepancy attributes to the difference of the sampling time between both analyses because significant change of air mass route occurred during the bulk sampling after completion of the single particle sampling.
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Chishima F, Hayakawa S, Ohta Y, Sugita K, Yamazaki T, Sugitani M, Yamamoto T. Ovarian Burkitt's lymphoma diagnosed by a combination of clinical features, morphology, immunophenotype, and molecular findings and successfully managed with surgery and chemotherapy. Int J Gynecol Cancer 2006; 16 Suppl 1:337-43. [PMID: 16515618 DOI: 10.1111/j.1525-1438.2006.00207.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Ovarian involvement as an initial manifestation of lymphoma, without detectable extraovarian disease, is a rare occurrence. The diagnosis of ovarian lymphoma is almost invariably unsuspected until the tumor has been examined histologically. A 25-year-old null gravid woman presented with abdominal distension. Presence of abnormal lymphoid cells in pleural effusion led to presurgical assumption that the pelvic mass noted on computerized tomography examination might be an ovarian lymphoma. We performed left salpingo-oophorectomy. Clinical, histologic, and molecular examination revealed Burkitt's lymphoma of the ovary with c-myc gene rearrangement and mRNA expression of multiple cytokines. She received dose-intensified combination chemotherapy. She is alive and free of disease 30 months after the diagnosis. Immunophenotype and molecular findings allowed reliable discrimination of Burkitt's lymphoma from diffuse large B-cell lymphoma and other lymphomas. If an ovarian tumor is solid and suspected to be of lymphoid origin, we suggest that it is necessary to obtain samples for genetic examination at surgery. This strategy often provides important information to establish therapeutic regimen and predict patient prognosis.
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100
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Hiraga A, Kuwabara S, Hayakawa S, Ito S, Arimura K, Kanai K, Yonezu T, Hattori T. Voltage-gated potassium channel antibody-associated encephalitis with basal ganglia lesions. Neurology 2006; 66:1780-1. [PMID: 16769968 DOI: 10.1212/01.wnl.0000218157.53333.79] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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