Low Grade Fibromyxoid Sarcoma in Thigh

A low grade fibromyxoid sarcoma is a rare soft tissue tumor that has a tendency to develop in the deep soft tissue of young adults and the potential for local recurrence or distant metastasis. There have been several case reports and sporadic reports in the literature. However, only 1 case has been reported in Korea but without a follow-up result. We describe a 54-year-old female patient with a low-grade fibromyxoid sarcoma of the thigh that had been growing slowly for 34 years. A marginal resection of this tumor was performed. Currently, the patient is doing well without evidence of local recurrence or distant metastasis at 5 years after surgery

Occurrence and characterization of oseltamivir-resistant influenza virus in children between 2007-2008 and 2008-2009 seasons

PurposeThere was a global increase in the prevalence of oseltamivir-resistant influenza viruses during the 2007-2008 influenza season. This study was conducted to investigate the occurrence and characteristics of oseltamivir-resistant influenza viruses during the 2007-2008 and 2008-2009 influenza seasons among patients who were treated with oseltamivir (group A) and those that did not receive oseltamivir (group B).MethodsA prospective study was conducted on 321 pediatric patients who were hospitalized because of influenza during the 2007-2008 and 2008-2009 influenza seasons. Drug resistance tests were conducted on influenza viruses isolated from 91 patients.ResultsThere was no significant difference between the clinical characteristics of groups A and B during both seasons. Influenza A/H1N1, isolated from both groups A and B during the 2007-2008 and 2008-2009 periods, was not resistant to zanamivir. However, phenotypic analysis of the virus revealed a high oseltamivir IC50 range and that H275Y substitution of the neuraminidase (NA) gene and partial variation of the hemagglutinin (HA) gene did not affect its antigenicity to the HA vaccine even though group A had a shorter hospitalization duration and fewer lower respiratory tract complications than group B. In addition, there was no significant difference in the clinical manifestations between oseltamivir-susceptible and oseltamivir-resistant strains of influenza A/H1N1.ConclusionEstablishment of guidelines to efficiently treat influenza with oseltamivir, a commonly used drug for treating influenza in Korean pediatric patients, and a treatment strategy with a new therapeutic agent is required

Synthesis of Heteroatom (B, N, and O)-Doped Carbons via Chlorination of a Carbonitride-Boride Mixture: Influence of Boron Addition on Structure and Electrochemical Properties of Carbon

The introduction of heteroatoms into carbon materials has been widely used to boost the surface reactivity of carbon materials, and doping of boron and/or nitrogen is one of the most powerful strategies to modify the characteristics of carbon materials. Unlike nitrogen doping that has been extensively investigated, the influence of boron doping on the synthesis of porous carbon materials has not been comprehensively understood. In this study, we successfully synthesize heteroatom (boron, nitrogen, and/or oxygen)-doped highly nanoporous carbon materials via the chlorination process of a carbonitride-boride mixture without additional treatment. Boron atoms are readily diffused from boride to adjacent carbonitride-derived carbon during the chlorination process and function as atomic welders, which are the key to construct a heteroatom-rich nanoporous carbon structure. Oxygen-rich nanoporous carbon and nitrogen-rich nanoporous carbon can be selectively synthesized by controlling the raw carbonitride precursor composition. They show superior catalytic performance in the 2e(-) and 4e(-) pathway oxygen reduction reaction, respectively.11Nsciescopu