background : nasopharyngeal carcinoma (npc) is known as a highly distinct kind of head and neck cancer. this distinction is due to its clinical presentation, epidemiology, outcome, and treatment. there have not been any reports of epidemiological analysis of npc in iran. the aim of this study is to evaluate the incidence rates and trends of nasopharyngeal carcinoma in the iranian population dur...

In bribery an external agent tries to alter the outcome of an election by changing some voters’ votes. Usually, when investigating bribery problems, full information is assumed, i.e., that the manipulative agent knows the set of candidates, each voter’s votes and the voting rule used. In this paper, we formally introduce different structures of partial information, we show the connections betwe...

conclusion this study has highlighted the anatomical variations of npc regarding its dimension, location and morphological appearance. cylindrical was the most common shape followed by funnel-shape, hourglass, and spindle, which were the other canal shapes with less frequency, respectively. the results suggest significant relationship between npc, and gender and dental status. the influence of ...

Nasopharyngeal carcinoma (NPC) is an uncommon disease in most countries but occurs with much greater frequency in southern China. This study aimed to examine the secular trends of NPC in urban Guangzhou over the time period of 2000-2011 using data from the Guangzhou Cancer Registry. Age-adjusted annual incidence rates of NPC were calculated by the direct method using the WHO World Standard Popu...

BACKGROUND Low serum albumin is predictive of poor survival in nasopharyngeal carcinoma (NPC). We evaluated the ability of the pretreatment albumin/globulin ratio (AGR) to predict long-term mortality in patients with NPC. METHODS This retrospective study examined an unselected cohort of 694 patients with NPC who had documented pretreatment total serum protein and serum albumin levels (ALB). A...

abstract   background: nasopharyngeal carcinoma (npc) is a nonlymphomatous squamous cell carcinoma (scc) that occurs in the epithelial lining of the nasopharynx. viral, geographic, and ethnic factors are responsible for its multifactorial futures. previous studies have showed the role of epstein-barr virus (ebv) in the pathogenesis of npc but no study has been conducted on the iranian populatio...

In the present study, the authors compared the long-term risk of nasopharyngeal carcinoma (NPC) of male participants in an NPC multiplex family cohort with that of controls in a community cohort in Taiwan after adjustment for anti-Epstein-Barr virus (EBV) seromarkers and cigarette smoking. A total of 43 incident NPC cases were identified from the 1,019 males in the NPC multiplex family cohort a...

OBJECTIVE To investigate the relationship between glutathione S-transferase M1 (GSTM1), and T1 (GSTT1) genetic polymorphism and susceptibility to nasopharyngeal carcinoma (NPC) using meta-analysis method. METHODS Data of published case-control studies on the relationship between GSTT1, GSTM1 genetic polymorphism and susceptibility to NPC were collected from EMBASE, PubMed, Web of Science, Chi...

First of all, in this paper, the topology and operation of the three-phase three-level Z-source inverter based on neutral-point-clamped (Z-NPC) are studied. Moreover, different combinations of permissible switching states and control signals are explained for this inverter. In this paper, the topology of the three-phase three-level Z-NPC inverter is extended for an n-level state. Also, a combin...

BACKGROUND Niemann-Pick type C disease (NPC) is a neurovisceral lipid storage disorder mainly characterized by unesterified cholesterol accumulation in lysosomal/late endosomal compartments, although there is also an important storage for several other kind of lipids. The main tissues affected by the disease are the liver and the cerebellum. Oxidative stress has been described in various NPC ce...