Masakatsu Ueno

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BACKGROUND Diffusion-weighted imaging (DWI) makes it possible to detect malignant tumors based on the diffusion of water molecules. However, it is uncertain whether DWI has advantages over FDG-PET for distinguishing malignant from benign pulmonary nodules and masses. MATERIALS AND METHODS One hundred- forty-three lung cancers, 17 metastatic lung tumors,(More)
Improved understanding of how esophageal cancer behaves following curative resection, including knowledge of other causes of death, is essential for informed decision making. The medical records of 246 consecutive patients with squamous cell carcinoma of the thoracic esophagus who had undergone esophagectomy and lymphadenectomy of the neck, chest, and(More)
BACKGROUND Diffusion-weighted magnetic resonance imaging (DWI) is reported to be useful for detecting malignant lesions. The purpose of this study is to clarify characteristics of imaging, detection rate and sensitivity of DWI for recurrence or metastasis of lung cancer. METHODS A total of 36 lung cancer patients with recurrence or metastasis were(More)
The survival of gastric cancer patients with peritoneal dissemination is dismal and surgical intervention is rarely indicated. The usefulness of TS-1, a novel oral anticancer drug, composed of tegafur, gimestat and otastat potassium at a molar ratio of 1:0.4:1, and the role of surgical intervention for this condition was studied. Among gastric cancer(More)
The role of reflux of duodenal contents in gastroesophageal reflux in Japanese patients, which may be different from that in Western patients, was studied. Methods: Intraesophageal pH and the bilirubin concentration were monitored, using the Bilitec 2000, in 43 patients with reflux symptoms and 10 normal volunteers. The percentage of the time that(More)
AIM   Single nucleotide polymorphisms (SNP) around interferon (IFN)-λ3 have been associated with the response to pegylated IFN-α treatment for chronic hepatitis C. Specific quantification methods for IFN-λ3 are required to facilitate clinical and basic study. METHODS   Gene-specific primers and probes for IFN-λ1, 2 and 3 were designed for real-time(More)
The significance of diffusion-weighted imaging (DWI) is uncertain for the diagnosis of nodal involvement. The purpose of this study was to examine diagnostic capability of DWI compared with PET-CT for nodal involvement of lung cancer. A total of 160 lung cancers (114 adenocarcinomas, 36 squamous cell carcinomas, and 10 other cell types) were analyzed in(More)
Pure bronchioloalveolar carcinomas have no stromal, vascular or pleural invasion, and they are candidates for curative wedge resection, although standard operative procedure for lung cancer is a pulmonary lobectomy. Most lung cancers with ground glass opacity (GGO), namely faint homogeneous shadows with sharp margin, are pure bronchioloalveolar carcinomas.(More)
To expand postoperative residual lungs after pulmonary lobectomy, thoracic drainage with two chest tubes has been recommended. Several studies recently demonstrated that postoperative drainage with one chest tube (PD1) was as safe as that with two chest tubes (PD2). However, most of the patients in those studies underwent lobectomy by standard thoracotomy.(More)
A case of esophageal tuberculosis presenting with an appearance similar to that of esophageal cancer is reported. The patient was an 82-year-old man with progressive dysphagia. Barium swallow and esophagoscopy revealed an elevated lesion with deep ulceration in the middle thoracic esophagus. Esophageal carcinoma, in particular, an undermining type of(More)