Publications by authors named "Tetsuya Omura"

We report a case in which a giant hepatic cyst located at the hepatic hilum and compressing the inferior vena cava was safely treated laparoscopically with careful attention to hemodynamics in a difficult fenestrated resection in a patient with severe kyphosis. The anatomic location of the cyst was evaluated preoperatively via 3D reconstruction of computed tomography images to identify a site where safe fenestrated resection could be performed. This was challenging because the surgical field was narrow due to the presence of severe kyphosis, and there was a risk of damage to surrounding organs during fenestrated resection.

View Article and Find Full Text PDF

Introduction: Several measurement methods designed to provide an understanding of cervical sagittal alignment have been reported, but few studies have compared the reliabilities of these measurement methods. The purpose of the present study was to investigate the intraexaminer and interexaminer reliabilities of several cervical sagittal alignment measurement methods and of the rotated cervical spine using plain lateral cervical spine X-rays of patients with cervical spine disorders.

Methods: Five different measurement methods (Borden's method; Ishihara index method (Ishihara method); C2-7 Cobb method (C2-7 Cobb); posterior tangent method: absolute rotation angle C2-7 (ARA); and classification of cervical spine alignment (CCSA)) were applied by seven examiners to plain lateral cervical spine X-rays of 20 patients (10 randomly extracted cases from a rotated cervical spine group and 10 from a nonrotated group) with cervical spine disorders.

View Article and Find Full Text PDF

Rhenium-catalysed C(sp(3))-H bond borylation in the absence of any oxidant, hydrogen acceptor, or external ligand, with the generation of H2 as the sole byproduct is described. The transformation, which represents a rare example of rhenium-catalysed C(sp(3))-H bond functionalisation, features high atom efficiency and simple reaction conditions.

View Article and Find Full Text PDF

Background/aim: Small cell carcinoma of the esophagus (SCCE) is a rare but very aggressive disease with poor prognosis. The aim of the present study was to identify a molecular signature to predict postoperative outcomes in patients with SCCE.

Materials And Methods: Expression of microRNA was detected in surgically-removed SCCE tumors using microarrays.

View Article and Find Full Text PDF

MicroRNA (miR)-203 has been shown to induce squamous differentiation of epidermal stem cells through the suppression of p63. The aim of this study was to assess the tumor suppressor effect of miR-203 in esophageal squamous cell carcinoma (ESCC) with focus on the regulation of the cell fate decisions and organization of tumor tissue architecture in vivo. Our investigation establishing stable clones from ESCC cell lines with induced miR-203 expression resulted in significant growth inhibition in a mouse xenograft model.

View Article and Find Full Text PDF

S-1 has been recommended as adjuvant chemotherapy in patients after curative surgery for gastric cancer. However, some patients suffer recurrence even after S-1 adjuvant chemotherapy. The present study was conducted to find a predictive marker of the efficacy of S-1 adjuvant chemotherapy.

View Article and Find Full Text PDF

Background: The clinical outcome of gastrointestinal stromal tumor (GIST) has been improved by the introduction of molecular-targeting drugs. However, resistance to these drugs appears during the course of treatment. The aim of this study was to establish and characterize a human xenograft model of GIST.

View Article and Find Full Text PDF

Aquaporins (AQPs) are important in controlling bile formation, however, the exact role of AQPs in human biliary tract carcinogenesis has not been clearly defined. In this study, we analyzed AQP-1, -4, -5 and -8 expression immunohistochemically using tissue microarrays (TMAs) in 81 samples. (45 gallbladder carcinomas and 36 bile duct carcinomas).

View Article and Find Full Text PDF