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Search Results: 1 - 10 of 2466 matches for " Kenji Kitahara "
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A Report on the Size of Information Unit to Extract Contents on the Web Text
Saori Kitahara,Kenji Hatano
Lecture Notes in Engineering and Computer Science , 2013,
Rational therapeutic strategy for T2 gallbladder carcinoma based on tumor spread
Naohiko Kohya, Kenji Kitahara, Kohji Miyazaki
World Journal of Gastroenterology , 2010,
Abstract: AIM: To evaluate the adequacy of surgical treatment of T2 gallbladder carcinoma (GBCa) according to tumor spread in the subserosal layer.METHODS: A series of 84 patients with GBCa were treated at Saga University Hospital, Japan between April 1989 and October 2008. The tumor stage was graded according to the TNM staging for GBCa from the American Joint Committee on Cancer Manual 6th edition. Tumor staging revealed 30 patients with T2 tumors. T2 GBCa was divided into three groups histologically by the extent of tumor spread in the subserosal layer, using a score of ss minimum (ss min), ss medium (ss med) or ss massive (ss mas).RESULTS: For ss min GBCa, there was no positive pathological factor and patient survival was satisfactory with simple cholecystectomy, with or without extra-hepatic bile duct resection. For ss med GBCa, some pathological factors, h-inf (hepatic infiltration), ly (lymphatic invasion) and n (lymph node metastasis), were positive. For ss mas GBCa, there was a high incidence of positive pathological factors. The patient group with extra-hepatic bile duct resection with D2 lymph node dissection (BDR with D2) and those with S4a5 hepatectomy had significantly better survival rates.CONCLUSION: We suggest that radical surgery is not necessary for ss min GBCa, and partial hepatectomy and BDR are necessary for both ss med and ss mas GBCa.
Analysis of Extrahepatic Multiple Primary Malignancies in Patients with Hepatocellular Carcinoma according to Viral Infection Status
Keita Kai,Atsushi Miyoshi,Kenji Kitahara,Masanori Masuda
International Journal of Hepatology , 2012, DOI: 10.1155/2012/495950
Analysis of Extrahepatic Multiple Primary Malignancies in Patients with Hepatocellular Carcinoma according to Viral Infection Status
Keita Kai,Atsushi Miyoshi,Kenji Kitahara,Masanori Masuda,Yukari Takase,Kohji Miyazaki,Hirokazu Noshiro,Osamu Tokunaga
International Journal of Hepatology , 2012, DOI: 10.1155/2012/495950
Abstract: Previous studies have investigated extrahepatic multiple primary malignancy (EHPM) associated with hepatocellular carcinoma (HCC). However, its correlation with viral infection, such as hepatitis B virus (HBV) or hepatitis C virus (HCV), has not been examined. The aim of this study is to investigate the association between EHPM and hepatitis infection in HCC patients. A total of 412 patients who underwent surgical resection for primary HCC were enrolled. Viral infection was evaluated by serum HBV surface antigen (HBs Ag) and HCV antibody (HCV Ab). Sixty-eight (16.5%) patients had one or more EHPM. The most frequent EHPM was gastric cancer ( ) in this cohort. No statistical significance was observed in the distribution of viral infection and incidence of entire EHPM. However, HCV Ab, HBs Ag, and negative status for both were correlated with the frequency of gastric ( ), urinary tract ( ), and breast cancer ( ), respectively. Infection of Helicobacter pylori was investigated by immunohistochemistry in gastric EHPM and resulted that 20 out of 21 analyzed cases were negative for Helicobacter pylori. Although it should be verified by well-designed large cohort studies, the current results suggested correlation between HCV infection and gastric cancer, HBV infection and urinary tract cancer and viral hepatitis-free status and breast cancer in HCC patients. 1. Introduction Extrahepatic multiple primary malignancy (EHPM) associated with hepatocellular carcinoma (HCC) has been investigated in previous reports [1–15]. However, the majority of these studies were performed decades ago. The improved survival rates in HCC patients, advances in diagnostic modalities and clinical treatments, and long-term followup might produce a higher incidence of EHPM as well as useful information for the treatment of HCC patients. Although chronic infection with hepatitis B virus (HBV) and/or hepatitis C virus (HCV) are well-known risk factors and are the most influential determinants for HCC, there have been few investigations of the correlation between viral infection status and EHPM. The aim of this study is to reveal the characteristics of EHPM in a cohort receiving long-term followup as well as the association between EHPM and the viral infection status in HCC patients. 2. Materials and Methods 2.1. Patients A total of 412 patients, who underwent a surgical resection for primary HCC between 1984 and December 2010 at Saga University Hospital, were included in this study. Informed consent for the use of medical information was obtained from all patients and the study protocol
Exhibition on Documenting disaster: natural disasters in Japanese history 1703-2003
I. Kitahara
Annals of Geophysics , 2004, DOI: 10.4401/ag-3343
Consecuencias del imbalance cognoscitivo
Michio Kitahara
Revista Latinoamericana de Psicología , 1975,
Anti-Addition Mechanism in the Intramolecular Hydroalkoxylation of Alkenes Catalyzed by PVP-Stabilized Nanogold
Hiroaki Kitahara,Hidehiro Sakurai
Molecules , 2012, DOI: 10.3390/molecules17032579
Abstract: (1R*,4S*,4aR*,9aS*,10S*)-10-Hydroxy-10-phenyl-1,4a,9a,10-tetrahydro-1,4-methanoanthracen-9(4H)-one (1c) was prepared for the elucidation of the reaction mechanism of intramolecular hydroalkoxylation of alkenes catalyzed by gold nanoclusters stabilized by a hydrophilic polymer, poly(N-vinyl-2-pyrrolidone) (Au:PVP). It was found that the reaction proceeded via anti-addition of alcohol to the alkene assisted by p-activation of the gold clusters, which is the same mechanism as the hydroamination by toluenesulfonamides.
A pesca demersal de profundidade e os bancos de corais azooxantelados do sul do Brasil
Kitahara, Marcelo Visentini;
Biota Neotropica , 2009, DOI: 10.1590/S1676-06032009000200003
Abstract: demersal fishing of important commercial fishes (lophius gastrophisus, urophisys brasiliensis and genipterus brasiliensis) and crustaceans (chaceon ramosae and chaceon sp.) along the upper slope off southern brazil has increased dramatically in the last decade. compilation of available data on the distribution of azooxanthellate corals between 24° and 35° s, compared with the distribution of bottom-longline, bottom-gillnets, trawl and trap fisheries shows that commercial fishing takes place over coral areas, providing evidence deep-sea reefs are important reservoirs of deep marine biodiversity. since the initial phase of exploitation by demersal fisheries, onboard observers are describing large captures of corals as "bycatch" suggesting deep-sea communities are being destroyed even before being studied. in order to ensure protection of deep-sea coral ecosystems and economic sustainability of demersal fisheries in southern brazilian waters, adoption of excluded fishing areas in those locations where azooxanthellate scleractinia occur is strongly recommended.
An illustrated key to the genera and subgenera of the Recent azooxanthellate Scleractinia (Cnidaria, Anthozoa), with an attached glossary
Stephen Cairns,Marcelo Kitahara
ZooKeys , 2012, DOI: 10.3897/zookeys.227.3612
Abstract: The 120 presently recognized genera and seven subgenera of the azooxanthellate Scleractinia are keyed using gross morphological characters of the corallum. All genera are illustrated with calicular and side views of coralla. All termes used in the key are defined in an illustrated glossary. A table of all species-level keys, both comprehensive and faunistic, is provided covering the last 40 years.
New records of azooxanthellate corals (Anthozoa, Scleractinia) from the southern Brazilian continental shelf and slope
Marcelo Visentini Kitahara
Biotemas , 2006,
Abstract: This study presents the records of Madrepora oculata Linnaeus, 1758, Solenosmilia variabilis Duncan, 1873, and Trochocyathus laboreli Cairns, 2000, for the southern Brazilian continental shelf and slope, and the extension of the occurrence of Lophelia pertusa (Linnaeus, 1758). All specimens were collected in Paraná, Santa Catarina and Rio Grande do Sul states (125-822 m deep). These species had only been recorded previously on the southeastern, northeastern and northern coasts of Brazil, and L. pertusa had only recently been recorded around Paraná state. Description, distribution and illustration are given. A short discussion on the ecological importance of the colonial species is provided.
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