RESUMEN
Objective:To study the relationship between the recurrence of benign meningiomas and cell proliferation, and to find some parameters that can predict the recurrence of benign meningiomas. Methods:49 samples from 15 recurrent benign meningiomas and 22 non recurrent benign meningimas were immunohistochemically stained with PCNA antibody and Ki 67 antibody.The ratios of positive tumor cells were calculated,then PCNA LI and Ki 67 LI of different groups were compared. Results:PCNA LI or Ki 67 LI in recurrent benign meningiomas was significantly higher than non recurent benign meningiomas individually( P 0.05). Conclusion:The proliferative potential of recurrent benign meningiomas was higher than that of non recurrent benign meningiomas.When the PCNA LI was greater than 2.0%,the recurrent risk was high.The proliferative potential did not increase when benign meningiomas recurred.