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PURPOSE To evaluate the prognostic value of variables including nodal size, level, laterality, extranodal neoplastic spread (ENS), and necrosis in patients with nasopharyngeal carcinoma (NPC) and further explore the feasibility of an N-staging system using Radiation Therapy Oncology Group (RTOG) guidelines for lymph node levels based on magnetic resonance(More)
Nitric oxide (NO) is a pleiotropic signalling molecule that binds to cytochrome c oxidase (complex IV) reversibly and in competition with oxygen. This action of NO has both physiological and pathophysiological consequences. Here we report that endogenously generated NO, which disrupts the respiratory chain, may cause changes in mitochondrial calcium flux.(More)
PURPOSE To investigate the incidence, prognostic value, and staging categories of retropharyngeal lymph node (RLN) metastasis in nasopharyngeal carcinoma (NPC). EXPERIMENTAL DESIGN We did a retrospective review of the data from 749 biopsy-proved nonmetastatic NPC patients. All patients had undergone contrast-enhanced computed tomography and had(More)
Macrophages can kill tumor cells by releasing high levels of nitric oxide (NO) and related reactive nitrogen species such as nitroxyl and peroxynitrite, after up-regulation of expression of the inducible nitric oxide synthase gene (iNOS). In this paper we describe two novel human cell lines that are capable of expressing high levels of iNOS under the(More)
This paper presents a novel two-step approach that incorporates fuzzy c-means (FCMs) clustering and gradient vector flow (GVF) snake algorithm for lesions contour segmentation on breast magnetic resonance imaging (BMRI). Manual delineation of the lesions by expert MR radiologists was taken as a reference standard in evaluating the computerized segmentation(More)
Clinical target volume (CTV) delineation is crucial for tumor control and normal tissue protection. This study aimed to define the locoregional extension patterns of nasopharyngeal carcinoma (NPC) and to improve CTV delineation. Magnetic resonance imaging scans of 2366 newly diagnosed NPC patients were reviewed. According to incidence rates of tumor(More)
BACKGROUND To compare the radiation-induced temporal lobe injury (TLI) in patients with nasopharyngeal carcinoma (NPC) treated with intensity-modulated radiotherapy (IMRT) or two-dimensional conventional radiotherapy (2D-CRT). PATIENTS AND METHODS 1276 cases of NPC treated with IMRT or 2D-CRT were retrospectively reviewed. A diagnosis of TLI was made on(More)
Intensity-modulated radiation therapy (IMRT) provides excellent locoregional control for nasopharyngeal carcinoma (NPC), and has gradually replaced two-dimensional conventional radiotherapy as the first-line radiotherapy technique. Furthermore, in the new seventh edition of the American Joint Committee on Cancer (AJCC) staging system, retropharyngeal lymph(More)
The prognostic value of T category for locoregional control in patients with nasopharyngeal carcinoma (NPC) has decreased with the extensive use of intensity-modulated radiotherapy (IMRT). We aimed to develop a prognostic scoring system (PSS) that incorporated tumor extension and clinical characteristics for locoregional control in NPC patients treated with(More)
Motion 2: The Metals &Alloys Subcommittee recommends to the Technical Committee that the M&A Standard empirical formula, space group, Z, Wyckoff sequence be made available to PDF4+ users. Note: M&A Standards are based upon the accepted Linus Pauling File (LPF) prototype structure for each material. Wallace moved. Dann seconded. Motion 3: The Metals & Alloys(More)