• Jia-shu Zhang, Xiao-lei Chen, Fang-ye Li, Jin-jiang Li, Gang Zheng, Ting Zhang, Shen Hu, and Bai-nan Xu.
• Department of Neurosurgery, PLA General Hospital, Beijing 100853, China.
• Zhonghua Yi Xue Za Zhi. 2012 Jul 3;92(25):1738-41.

ObjectiveTo evaluate the influences of high-field intraoperative magnetic resonance imaging (iMRI) on the extent of resection (EoR) in low-grade gliomas.MethodsFifty-nine patients with low-grade gliomas underwent microsurgeries under the guidance of high-field iMRI and functional neuro-navigation. The rates of gross total removal and EoR were recorded after initial and final iMRI scans and neurological performances were evaluated peri-operatively and at follow-up.ResultsiMRI and functional neuronavigation were successfully performed in all patients. Initial iMRI found that the rates of gross total removal were misestimated in 21 cases (35.6%). In 17 cases (28.8%), initial iMRI revealed resectable residual tumors and further resection achieved gross total removal in 8 cases (13.6%). iMRI boosted the level of EoR from 90% ± 15% to 94% ± 12% (P < 0.001) in all cases and from 78% ± 17% to 91% ± 12% in 17 cases undergoing further tumor resections. At 3-month follow-up, 2 cases (3.4%) developed neurological deficits.ConclusionThe combination of iMRI and functional neuronavigation helped maximize safe tumor resection in low-grade gliomas.

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