BACKGROUND Bronchogenic cysts are rare developmental anomalies that belong to the category of congenital enterogenous cysts.They arise from lung buds and are present at birth.The embryonic foregut is their origin.Typi...BACKGROUND Bronchogenic cysts are rare developmental anomalies that belong to the category of congenital enterogenous cysts.They arise from lung buds and are present at birth.The embryonic foregut is their origin.Typically,they are located within the chest cavity,particularly in the cavum mediastinale of the thoracic cavity or lodged in the pulmonary parenchyma,and are considered a type of lung bud malformation.CASE SUMMARY A 49-year-old male patient was admitted to the hospital due to the detection of a retroperitoneal mass during a physical examination.Two weeks before admission,the patient underwent a physical examination and routine laboratory tests,which revealed a space-occupying mass in the retroperitoneal region.The patient did not report any symptoms(such as abdominal pain,flatulence,nausea,vomiting,high fever,or chills).The computed tomography(CT)revealed a retroperitoneal spaceoccupying lesion with minimal enhancement and a CT value of approximately 36 Hounsfield units.The lesion was not delineated from the boundary of the pancreatic body and was closely related to the retroperitoneum locally.CONCLUSION Following a series of tests,an abdominal mass was identified,prompting the implementation of a laparoscopic retroperitoneal mass excision procedure.During the investigation,an 8 cm×7 cm cystic round-shaped mass with a distinct demarcation was identified in the upper posterior region of the pancreas.Subsequently,full resection of the mass was performed.Postoperative pathological examination reveled a cystic mass characterized by a smooth inner wall.The cystic mass was found to contain a white,viscous liquid within its capsule.展开更多
目的:探讨甲状腺乳头状癌线粒体DNA(mt DNA)D环区基因突变和线粒体微卫星不稳定及其与临床病理参数之间的相关性。方法:选取96例甲状腺乳头状癌石蜡组织标本,提取DNA并对mt DNA D环区序列行巢式PCR扩增,通过正反向直接测序对扩增产物基...目的:探讨甲状腺乳头状癌线粒体DNA(mt DNA)D环区基因突变和线粒体微卫星不稳定及其与临床病理参数之间的相关性。方法:选取96例甲状腺乳头状癌石蜡组织标本,提取DNA并对mt DNA D环区序列行巢式PCR扩增,通过正反向直接测序对扩增产物基因序列进行检测,利用Mitomaster软件将所测区的基因序列与剑桥标准系列(revised Cambridge reference sequence,r CRS)及相关数据库进行比对,分析D环区基因突变与临床病理参数之间的相关性。结果:采用巢式PCR成功扩增出91例甲状腺乳头状癌石蜡标本mt DNA D环区序列,扩增成功率达到94.8%;87例标本(90.6%)检测出突变位点35个,共255个突变,其中D310及D514区域存在微卫星不稳定;统计结果表明患者年龄、性别、肿瘤直径、TNM分期与mt DNA D环区突变个数无相关性(P>0.05)。结论:甲状腺乳头状癌mt DNA D环区基因存在高频突变,可能在甲状腺乳头状癌的发病中起重要作用。展开更多
In this paper, our focus is to investigate the notion of irresolute topological vector spaces. Irresolute topological vector spaces are defined by using semi open sets and irresolute mappings. The notion of irresolute...In this paper, our focus is to investigate the notion of irresolute topological vector spaces. Irresolute topological vector spaces are defined by using semi open sets and irresolute mappings. The notion of irresolute topological vector spaces is analog to the notion of topological vector spaces, but mathematically it behaves differently. An example is given to show that an irresolute topological vector space is not a topological vector space. It is proved that: 1) Irresolute topological vector spaces possess open hereditary property;2) A homomorphism of irresolute topological vector spaces is irresolute if and only if it is irresolute at identity element;3) In irresolute topological vector spaces, the scalar multiple of semi compact set is semi compact;4) In irresolute topological vector spaces, every semi open set is translationally invariant.展开更多
The present study deals with the introduction of an alteration in Legendre wavelets method by availing of the Picard iteration method for system of differential equations and named it Legendre wavelet-Picard method （...The present study deals with the introduction of an alteration in Legendre wavelets method by availing of the Picard iteration method for system of differential equations and named it Legendre wavelet-Picard method （LWPM）. Convergence of the proposed method is also discussed. In order to check the competence of the proposed method, basic enzyme kinetics is considered. Systems of nonlinear ordinary differential equations are formed from the considered enzyme-substrate reaction. The results obtained by the proposed LWPM are compared with the numerical results obtained from Runge-Kutta method of order four （RK-4）. Numerical results and those obtained by LWPM are in excellent conformance, which would be explained by the help of table and figures. The proposed method is easy and simple to implement as compared to the other existing analytical methods used for solving systems of differential equations arising in biology, physics and engineering.展开更多
文摘BACKGROUND Bronchogenic cysts are rare developmental anomalies that belong to the category of congenital enterogenous cysts.They arise from lung buds and are present at birth.The embryonic foregut is their origin.Typically,they are located within the chest cavity,particularly in the cavum mediastinale of the thoracic cavity or lodged in the pulmonary parenchyma,and are considered a type of lung bud malformation.CASE SUMMARY A 49-year-old male patient was admitted to the hospital due to the detection of a retroperitoneal mass during a physical examination.Two weeks before admission,the patient underwent a physical examination and routine laboratory tests,which revealed a space-occupying mass in the retroperitoneal region.The patient did not report any symptoms(such as abdominal pain,flatulence,nausea,vomiting,high fever,or chills).The computed tomography(CT)revealed a retroperitoneal spaceoccupying lesion with minimal enhancement and a CT value of approximately 36 Hounsfield units.The lesion was not delineated from the boundary of the pancreatic body and was closely related to the retroperitoneum locally.CONCLUSION Following a series of tests,an abdominal mass was identified,prompting the implementation of a laparoscopic retroperitoneal mass excision procedure.During the investigation,an 8 cm×7 cm cystic round-shaped mass with a distinct demarcation was identified in the upper posterior region of the pancreas.Subsequently,full resection of the mass was performed.Postoperative pathological examination reveled a cystic mass characterized by a smooth inner wall.The cystic mass was found to contain a white,viscous liquid within its capsule.
文摘目的:探讨甲状腺乳头状癌线粒体DNA(mt DNA)D环区基因突变和线粒体微卫星不稳定及其与临床病理参数之间的相关性。方法:选取96例甲状腺乳头状癌石蜡组织标本,提取DNA并对mt DNA D环区序列行巢式PCR扩增,通过正反向直接测序对扩增产物基因序列进行检测,利用Mitomaster软件将所测区的基因序列与剑桥标准系列(revised Cambridge reference sequence,r CRS)及相关数据库进行比对,分析D环区基因突变与临床病理参数之间的相关性。结果:采用巢式PCR成功扩增出91例甲状腺乳头状癌石蜡标本mt DNA D环区序列,扩增成功率达到94.8%;87例标本(90.6%)检测出突变位点35个,共255个突变,其中D310及D514区域存在微卫星不稳定;统计结果表明患者年龄、性别、肿瘤直径、TNM分期与mt DNA D环区突变个数无相关性(P>0.05)。结论:甲状腺乳头状癌mt DNA D环区基因存在高频突变,可能在甲状腺乳头状癌的发病中起重要作用。
文摘In this paper, our focus is to investigate the notion of irresolute topological vector spaces. Irresolute topological vector spaces are defined by using semi open sets and irresolute mappings. The notion of irresolute topological vector spaces is analog to the notion of topological vector spaces, but mathematically it behaves differently. An example is given to show that an irresolute topological vector space is not a topological vector space. It is proved that: 1) Irresolute topological vector spaces possess open hereditary property;2) A homomorphism of irresolute topological vector spaces is irresolute if and only if it is irresolute at identity element;3) In irresolute topological vector spaces, the scalar multiple of semi compact set is semi compact;4) In irresolute topological vector spaces, every semi open set is translationally invariant.
文摘The present study deals with the introduction of an alteration in Legendre wavelets method by availing of the Picard iteration method for system of differential equations and named it Legendre wavelet-Picard method （LWPM）. Convergence of the proposed method is also discussed. In order to check the competence of the proposed method, basic enzyme kinetics is considered. Systems of nonlinear ordinary differential equations are formed from the considered enzyme-substrate reaction. The results obtained by the proposed LWPM are compared with the numerical results obtained from Runge-Kutta method of order four （RK-4）. Numerical results and those obtained by LWPM are in excellent conformance, which would be explained by the help of table and figures. The proposed method is easy and simple to implement as compared to the other existing analytical methods used for solving systems of differential equations arising in biology, physics and engineering.
