目的 探讨延髓肿瘤的治疗策略，以达到最佳预后。 方法 回顾分析2007年1月－2010年12月19例延髓肿瘤患者的临床资料，其中18例经外科手术治疗和病理证实，1例通过影像学确诊。 结果 12例血管网状细胞瘤中，11例手术全切，1例手术次全切；2例室管膜瘤均手术全切；2例海绵状血管瘤分别手术全切及伽马刀治疗；3例胶质瘤均手术部分切除。18例手术治疗患者术后神经功能障碍明显好转者13例，无明显变化者3例，2例因术后严重并发症死亡；1例伽马刀治疗患者症状好转。术后随访6～48个月，平均24个月。11例恢复工作，4例生活可自理，2例因肿瘤复发死亡。结论 术前通过MRI检查、术中神经电生理监测及熟练的显微外科技术是外科治疗优势，伽马刀治疗延髓较小肿瘤有着损伤小的优点，因此制定合理的治疗策略有利于提高患者生存质量。
Objective To systematically evaluate posterior fossa decompression with duraplasty (PFDD) and posterior fossa decompression without duraplasty (PFD) for Chiari malformation type I (CM-I). Methods A meta-analysis was performed according to the guideline of the MOOSE statement. Relevant literature and references were electronically searched in CENTRAL, Science Citation Index Expanded, MEDLINE (Ovid), PubMed, CBM, CNKI and WanFang Data from 1993 to September 2011. Two reviewers independently identified literature according to inclusion and exclusion criteria. The included studies were evaluated using the Newcastle-Ottawa Scale. Original data were extracted and analyzed using RevMan 5.1 software. Besides, the level of evidence was assessed using the GRADE system. Results Ten studies involving 829 patients were included. The results of meta-analyses showed that: a) compared with patients undergoing PFD, patients undergoing PFDD had a significantly lower reoperation rate (RR=0.41, 95%CI 0.23 to 0.74, P=0.003), and a higher rate of syringomyelia decrease (RR=1.27, 95%CI 1.03 to 1.56, P=0.02). But there was no significant difference in clinical improvement (RR=1.11, 95%CI 0.95 to 1.28, P=0.18). b) compared with PFD, patients undergoing PFDD had a higher rate of cerebrospinal fluid–related complications (RR=6.3, 95%CI 2.71 to 14.67, Plt;0.000 1). There were no significant differences in the complication of occipital neuralgia and wound infection (Pgt;0.05). Based on GRADE system, the evidence was at Level C and we made a weak recommendation. Conclusion Posterior fossa decompression with duraplasty is associated with a lower risk of reoperation, a better effect of syringomyelia decrease and a greater risk for cerebrospinal fluid–related complications, compared with PFD. Due to the influencing factors of lower-quality included studies, a prudent choice is suggested, and also more high-quality, large-sample studies are need.