Objective      To evaluate the efficacy of microneurosurgery combined with Gamma knife radiosurgery in treatment of patients with confluens sinus meningiomas.       Methods      The clinical data including general information

method of treatment

and therapeutic effect of 15 patients with benign confluens sinus meningiomas treated by microneurosurgery and Gamma knife radiosurgery during 2006 to 2011 were retrospectively analyzed. The tumors were resected via different approaches and operative methods according to the position of tumor basement and the direction of tumor growth.       Results      According to Simpson’s classification

Simpson Grade Ⅰ was achieved in 1 patient

Simpson Grade Ⅱ was achieved in 2 patients

and Simpson Grade Ⅲ to Ⅳ was achieved in 12 patients. The 12 patients who cannot achieve Simpson Grade Ⅰ to Ⅱ resection were given Gamma knife radiosurgery after operation. The 15 patients were followed up systematically for 1 to 5 years. The clinical conditions improved significantly in 13 patients and were stable in 2 patients with no recurrence.       Conclusion      For confluens sinus meningiomas

Gamma knife radiosurgery is proved to be an effective treatment for those patients with tumor residues after craniotomy

significantly reducing the recurrence rate.