Publications by authors named "Takuma Hayama"

We report the case of a 66-year-old man with primary diffuse large B-cell lymphoma of the prostate presenting with urinary retention and dyschezia as first manifestation. Although a colostomy was needed due to rectal obstruction, rituximab-combined chemotherapy resulted in complete remission. He underwent stoma closure safely and has remained in complete remission for over 3years.

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Background And Purpose: Various hemostatic agents have been used quite effectively for hemostasis, as well as for providing effective adhesion during laparoscopic partial nephrectomies. In this study, we investigated the adhesiveness to the renal tissue of some sheet-type hemostatic agents used in combination with a liquid fibrin sealant.

Materials And Methods: In Experiment A, component solutions of the fibrin glue (liquid fibrin sealant) were dripped onto a kite string placed annularly on a porcine kidney slice.

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Liquid fibrin sealants, together with sheet-type hemostatic agents, have been used during partial nephrectomies to secure effective hemostasis at the suture site. Using animal kidneys, we investigated which hemostatic agent might adhere most effectively to the renal tissue and serve best as a bolster. Liquid fibrin sealant alone, or in combination with a sheet-type hemostat, such as collagen, gelatin or oxidized-cellulose hemostat, was applied to the cut surface of the kidney of anesthetized rabbits, and the differences in the degree of adherence to the kidney and resultant hemostatic efficacy were evaluated.

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Objectives: To investigate the leukotriene (LT) D(4) (LTD(4)) receptor (cysteinyl-LT(1) receptor [CysLT(1)R]) expression in transitional cell carcinoma (TCC) of the bladder, as well as the effects of the CysLT(1)R antagonist on cell proliferation in TCC cell lines. The metabolism of arachidonic acid by either cyclooxygenase or lipoxygenase is thought to play an important role in carcinogenesis. LTD(4) is a pro-inflammatory mediator derived from arachidonic acid through various enzymatic steps, and 5-lipoxygenase is an important factor in generating LTD(4).

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In renal transplantation, ischemia-reperfusion (I/R) injury is a major cause of renal dysfunction. Activated neutrophils are reported to be closely involved in I/R injury after renal transplantation. Neutrophil elastase, a protease released from activated neutrophils, damages tubular endothelial cells.

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The metabolism of arachidonic acid by either cyclooxygenase or lipoxygenase is believed to play an important role in carcinogenesis. Leukotriene (LT) D4 is a proinflammmatory mediator derived from arachidonic acid through various enzymatic steps, and 5-lipoxygenase is an important factor in generating LTD4. We investigated LTD4 receptor (cysteinyl LT1 receptor: CysLT1R) expression in prostate cancer (PC), as well as the effects of CysLT1R antagonist on cell proliferation in PC cell lines.

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The accurate diagnostic localization of extra-adrenal pheochromocytoma is important in the treatment of primary and metastatic tumors. In this study, we report on a case of extra-adrenal pheochromocytoma in which the tumor could not be diagnosed by 131I-metaiodobenzylguanidine (MIBG) scintigraphy but only by 123I-MIBG scintigraphy. Our patient was a 16-year old girl whose chief complaint was headaches.

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