Abstract: To demonstrate the causes of recurrence of meningiomas, reviewed their experiences of management in 17 patients with recurrent meningiomas. In every postoperative specimens, the light microscope (LM) and eletronic microscopy (EM) examinations were performed respectively. In 9 cases of 17 patients, the EM analysis revealed the trends to partial malignancy, while in all cases LM examinations exhibited typical nature of benign meningiomas. Conclusions for treatment of reccurent meningiomas, total resection should be emphasized and postopreative ultrastructure examinations of the specimens also be ercommended. It maybe effective for patients who have pathologogical malignancy trends to give adjuvent radiotherapy to improve the prognosis.

Key words: meningiomas, operative treatment, ultrastructure pathology