Twenty patients with intradural extramedullary tumors were treated sutgically in our hospital from 1979 to 1994. Five of twenty patients had recurrent tumors and required reoperation. Histology of the recurrent tumors diagnosed three cases to be neurinoma and two cases were meningioma. The recurrence rate was 23% for neurinoma and 33% for menigioma. The main cause of recurrence was incomplete resection of the tumor at the primary operation. In two cases of recurrent neurinoma, multipletumors were found at the second operation. We need to consider Neurofibromatosis 2 when diagnosing multiple tumors in the central nervous system.
