Purpose: Oligodendrogliomas is of 1-5 % of primary intracranial tumors in adults. Adjuvant radiotherapy is suggested following maximal surgical resection. This study retrospectively evaluates the oligodendroglioma cases who applied to our clinic in 10 years.

Patients and Method: 615 cases with intracranial tumors applied to our clinic between 1985-1999. 14 patients had oligodendrogliomas (2.27 %). 6 were female and 8 were male (FemalelMale: 3/4). The most common age range was 40-50 (14-72 ages). In all patients the tumor had supratentorial localization. 4 patients were at stage 2a, 7 at stage 2b, 3 at stage 4. The most frequent surgery was subtotal resection (7 patients- 50 %). 12 patients had total cranial, 2 had partial cranial radiotherapy.

Results: 5 of our patients currently survive disease-free, 9 are excitus, 6 had no disease-free survival, and 8 had an average disease free survival of 26 months. The mean survival is 19.7 months (3-55 months). 1f the patient's condition is appropriate, partial cranial radiotherapy yields the longest disease-free and total survival times (The mean disease-free survival is 38.5 months and the total survival is 41 months).