Aim:The author evaluated the impact of high-field intraoperative
MRI (iMRI) and functional neuronavigation on insular high-grade glioma(HGG) surgery.
Material and Methods:Between 2010 and 2014, 51 insular HGG patients underwent
operations guided by combined high-field iMRI and functional
neuronavigation.22 insular HGG patients underwent conventional
neuronavigation operations were assessed as the control group. Tumor
volumetric scan analysis, Karnofsky performance score (KPS) and follow-up results were reviewed retrospectively.
Results:Residualtumor of 37 patients was further resected in the iMRI assisted group.The median extent of resection(EOR) increased significantly from 79% (58%–100%) to [96%( 86%–100%),p<0.001]. The median EOR of iMRI assisted group [96% (86%–100%)] was significantly higher than that of conventional neuronavigation group [84% (69%–100%); p =0.031].Mean residual tumor volume of iMRI assisted group [0.6 (0.0-5.2) cm3] was significantly smaller than that of conventional neuronavigation group [3.8 (0.0-12.1) cm3; p =0 .003]. KPS within3 days after surgery reduced and KPS at 3 months after surgery improved for both groups. KPS of iMRI assisted group [90(70-100)] was significantly higher than that of control group [80(60-100); p =0 .021] at 3 months after surgery. The median progression-free survival (PFS) of iMRI assisted group [18(9-42) months] is better than that of control group [15(3-32); p =0 .010]. The median overall survival (OS) of iMRI assisted group [28(14-49)] is better than that of control group [18 (7-38); p =0 .035].
Conclusion:Combined high-field iMRI and functionalneuronavigation optimize the extent of resection and minimize the morbidity in insular HGG surgery. Aggressive resection of insular HGG is predictive of improved OS and PFS.