1Analysis of variation trends and influencing factors of postoperative electrolyte disturbance in meningiomasWang Weihong, Zou Yourui, Xue Tao, Jin Jing, Cheng Qian, Yuan Meng1-42Correlation study between preoperative data and Ki-67 in meningiomas and its significanceLin Xiaoyu, Ma Tao, Ni Zhihui, Zhang Yu5-83Resection of large olfactory groove meningiomas via the frontal wrinkle incision and interhemispheric approachGao Xin, Wang Yuming, Sun Mei, Huang Ying9-124A comparative study of vagus nerve stimulation and corpus callosotomy for drug refractory epilepsyFang Zhonghao, Shan Qiao, Zhao Dexiao, Wu Jianheng, Li Peidong, Wang Zhen, Wu Yuehui, Yuan Xiaowei13-165Multiple electrophysiological monitoring techniques combined with microsurgery for cervical intramedullary tumorsWang Lin, He Fang, Mei Cuizhu, Xu Hao, Yang Tao, Xia Chengyu, Fu Xianming17-206A comparative study of anterior subcutaneous transposition and submuscular transposition of the ulnar nerve in the treatment of dialysis-related ulnar nerve entrapment syndromeYang Wenqiang, Yu Yanbing, Wang Qi, Xu Xiaoli, Zhang Li21-247Collision tumors in the sellar region:Report of 2 cases and literature reviewShen Yanya, Zhao Yi, Lian Wei, Xing Bing, Ma Wenbin, Liang Yancai25-28