Histiocytoid hemangioma of the heart with peripheral eosinophilia

A histiocytoid hemangioma of the heart is reported, which was found incidentally in a man with unusually high eosinophilia. The eosinophilia subsided dramatically following removal of the tumor. The "histiocytoid" or the "epithelioid" appearance of the tumor cells and the presence of vacuolated cells were the characteristic microscopic features. The endothelial origin of this tumor was verified by positive immunostaining for factor VIII-related antigen and ultrastructural demonstration of intracytoplasmic lumen formation, abundant cytoplasmic filaments, pinocytotic vesicles, and prominent basal lamina. The presence of mitotic activity, cellular pleomorphism, and tumor necrosis raised the possibility of its malignant potential. The occurrence of this tumor in the heart may be mistaken for a myxoma clinically and a metastatic carcinoma pathologically.     

Employment Consequences of COVID-19 for People with Disabilities and Employers

Journal of Occupational Rehabilitation - Purpose The COVID-19 pandemic has disproportionately affected the lives of people with disabilities (PWD). How the pandemic affects the employment of PWD...     

异丙酚麻醉下行钳刮术82例临床观察

目的 :探讨异丙酚麻醉下行孕 10～ 13周钳刮术镇痛效果及安全性。方法 :应用异丙酚静脉给药麻醉后钳刮 (观察组 )。与无任何镇痛方法钳刮 (对照组 )。结果 :观察组与对照组在宫口松驰度 ,手术时间 ,出血量方面相比无明显差异 (P >0 .0 5 ) ,人工流产综合征发生率观察组 0 ,对照组 5 9%。结论 :异丙酚麻醉下行钳刮术能安全镇痛 ,避免人流综合征的发生     

大鼠磨牙三维有限元模型的建立

目的 :建立大鼠磨牙的三维有限元模型 ,探讨牙及牙周组织的应力分布状况。方法 :采用Sprague Dawley大鼠 2 0只 ,建立大鼠磨牙正畸移动的动物模型 ,制作大鼠上颌第一磨牙牙周连续切片 ;采用计算机技术 ,重建牙及牙周组织三维形态、结构 ,并建立其三维有限元模型。结果 :组织切片的应力分布显示牙周膜是一种存在于两种硬组织之间的软组织 ,有其特有的应力分布状态。结论 :本研究建立的正畸大鼠磨牙三维有限元模型是观察正畸牙移动过程中分析应力的一种简便、准确、可靠的模型及方法。     

单片微机化微弱发光测量仪及其在肿瘤研究中的初步应用

单片微机化微弱发光测量仪由中科院生物物理所和北京科龙生物医学技术开发公司研制成功。该仪器适用于肿瘤研究中生物医学样品的微弱发光的测量。测量样品的重复性优于０．８％，稳定性优于０．５％，线性相关系数达０．９９９７，不仅可以进行样品的发光强度测量，还可以进行动力学曲线的测量以及样品发射光谱的测量。光谱在４００ｎｍ－７５０ｎｍ范围内。测量方式可选择手动、半自动和自动计时三种。测量结果表明，荷瘤裸鼠血液微