A malignant peripheral nerve sheath tumor(MPNST)is a rare neoplasm arising f rom peripheral nerve sheath.Here,we report the first case of MPNST arising in the colon and also the youngest case of MPNST in the gastroint...A malignant peripheral nerve sheath tumor(MPNST)is a rare neoplasm arising f rom peripheral nerve sheath.Here,we report the first case of MPNST arising in the colon and also the youngest case of MPNST in the gastrointestinal tract.The patient was a 2-day-old neonate with symptoms and signs of intestinal obstruc tion.The patient had no family history or stigmata of neurofibromatosis type 1.A computed tomographic scan revealed a 5-cm-sized mass in ascending colon cau sing intestinal obstruction,and emergent right hemicolectomy was performed.The microscopic examination showed atypical spindle cells with hyperchromatic nucle i and high mitotic activity.The results of immunohistochemical staining,which showed positivity for S-100 and vimentin as well as negativity for smooth muscl e actin,CD34,and c-Kit,supported the final diagnosis of MPNST.Genetic analy sis of the patient revealed no abnormalities.After surgery,the patient recover ed uneventfully and has been free of the disease for 17 months.展开更多
A number of piping components in the secondary system of nuclear power plants (NPPs) have been exposed to aging mechanisms such as FAC (Flow-Accelerated Corrosion), cavitation, flashing, LDIE (Liquid Droplet Impingeme...A number of piping components in the secondary system of nuclear power plants (NPPs) have been exposed to aging mechanisms such as FAC (Flow-Accelerated Corrosion), cavitation, flashing, LDIE (Liquid Droplet Impingement Erosion), and SPE (Solid Particle Erosion). Those mechanisms may lead to thinning, leaking, or the rupture of components. Due to the pipe ruptures caused by wall thinning of Surry Unit 2 in 1986 and Mihama Unit 3 in 2004, pipe wall thinning management has emerged as one of the most important issues in the nuclear industry. To manage the wall thinning of pipes caused by FAC and erosion, KEPCO-E & C has developed ToSPACE program. It can predict both FAC & erosion phenomena, and also be utilized in the pipe wall thinning management works such as susceptibility analysis, UT (Ultrasonic Test) data evaluation as well as establishment of long-term inspection plan. Even though the ToSPACE can predict the five aging mechanisms mentioned above, only the FAC prediction result using ToSPACE was compared herein with the experimental result using FACTS (Flow Accelerated Corrosion Test System) to verify the ToSPACE’s capability. In addition, the FAC prediction result using ToSPACE was also compared with that of CHECWORKS that is widely used all over the world.展开更多
文摘A malignant peripheral nerve sheath tumor(MPNST)is a rare neoplasm arising f rom peripheral nerve sheath.Here,we report the first case of MPNST arising in the colon and also the youngest case of MPNST in the gastrointestinal tract.The patient was a 2-day-old neonate with symptoms and signs of intestinal obstruc tion.The patient had no family history or stigmata of neurofibromatosis type 1.A computed tomographic scan revealed a 5-cm-sized mass in ascending colon cau sing intestinal obstruction,and emergent right hemicolectomy was performed.The microscopic examination showed atypical spindle cells with hyperchromatic nucle i and high mitotic activity.The results of immunohistochemical staining,which showed positivity for S-100 and vimentin as well as negativity for smooth muscl e actin,CD34,and c-Kit,supported the final diagnosis of MPNST.Genetic analy sis of the patient revealed no abnormalities.After surgery,the patient recover ed uneventfully and has been free of the disease for 17 months.
文摘A number of piping components in the secondary system of nuclear power plants (NPPs) have been exposed to aging mechanisms such as FAC (Flow-Accelerated Corrosion), cavitation, flashing, LDIE (Liquid Droplet Impingement Erosion), and SPE (Solid Particle Erosion). Those mechanisms may lead to thinning, leaking, or the rupture of components. Due to the pipe ruptures caused by wall thinning of Surry Unit 2 in 1986 and Mihama Unit 3 in 2004, pipe wall thinning management has emerged as one of the most important issues in the nuclear industry. To manage the wall thinning of pipes caused by FAC and erosion, KEPCO-E & C has developed ToSPACE program. It can predict both FAC & erosion phenomena, and also be utilized in the pipe wall thinning management works such as susceptibility analysis, UT (Ultrasonic Test) data evaluation as well as establishment of long-term inspection plan. Even though the ToSPACE can predict the five aging mechanisms mentioned above, only the FAC prediction result using ToSPACE was compared herein with the experimental result using FACTS (Flow Accelerated Corrosion Test System) to verify the ToSPACE’s capability. In addition, the FAC prediction result using ToSPACE was also compared with that of CHECWORKS that is widely used all over the world.
