Ependymomas rarely occur outside the CNS. Of those that do, the majority are in the sacrococcygeal or presacral areas.
室管膜瘤很少见于中枢神经系统之外，假如有的话，主要见于骶尾部或骶前区。
2
Objective: To investigate the efficacy and safety of laparoscopic presacral neurectomy ( LSPN ) as the surgical treatment of endometiosis dysmenorrheal .
目的比较直肠癌前切除术采用加速康复外科治疗与传统围手术期处理方法的安全性及有效性。
3
To investigate the reasons and management of presacral vein massive hemorrhage during rectal cancer surgery and the effect of gauze compression packing hemostasis.