Objective To analyze the advances of cancer stem cell (CSC) in recent years, and to propose a prospect for CSC research and cancer therapy. Methods Articles about important advances of CSC theory and cancer therapy were reviewed, and then selected and summarized. Results In 2001, CSC was first put forward as a concept, till now, which has been confirmed in many tissues. In recent years, efforts were dedicated to such topics including: identification of CSC in sol id tumors, the origin of CSC, its niche and growth mechanism, cancer therapy, etc. According to the CSC theory, traditional therapeutic methods have deficiencies, and new treatment targeting CSC may thoroughly el iminate tumors. Conclusion At present, CSC theory is still controversial, while it proposed revolutionary methods and directions for the therapy of cancer.
Purpose To investigate the development of embryonic stem cells (ESC)in the subretinal space． Methods ESC were cultivated in suspension for 4 days till they developed into cell aggregates,i.e.embryonic body(EB).ESC as well as EB combined with or without RA were respectively transplanted into vitreous cavity and subretina1 space in SD rats,and the subretinal transplanted eyes,transient ischemia-reperfusion injuries were made by ligating the ophthalmic artery for 40 seconds before the transplantation .The experimental eyes were enucleated for histological and immunohistochemical assays after 14～28 d. Results The EB was found to develope into photoreceptors induced by RA in the subretinal space under an ischemia-reperfusion condition，and EB transplantation without RA induction induced multiple differentiations in the subretinal space.The single injection of RA without EB induced hyperplasia of the neural retinal cells.ESC transplanted into vitreous cavity rapidly proliferated and developed into atypical hyperplastic mass. Conclusion EB derived from ESC can differentiate into photoreceptors induced by RA in the host subretinal space under an ischemia-reperfusion condition. (Chin J Ocul Fundus Dis，2000，16：213-284)
目的 总结胰腺实性假乳头状瘤（solid-pseudopapillary tumor of pancreas, SPTP）的诊治经验。方法 回顾性分析我院1999年11月至2007年10月期间收治的6例SPTP患者的临床资料。结果 6例均为女性，其中4例为年轻女性； 术前均未确诊； 行胰腺体尾部切除2例，肿瘤局部切除4例，其中2例加脾切除，术后病理报告确诊为SPTP。 术后无严重并发症，随访1～95个月，无复发和转移。结论 SPTP多发于年轻女性，术中冰冻切片对术中处理提供参考，手术切除为首选治疗方法，预后良好。