Second neoplasm and cerebrovascular disease in over five-year survivors with CNS germ cell tumor

Abstract

9046 Background: Survivors of childhood and adolescent brain tumors are at risk for long-term effects of treatment (Tx). This study investigates details on second neoplasm and cerebrovascular disease of long-term survivors with CNS germ cell tumors (CNSGCTs). Methods: The authors reviewed clinical data on 203 institutional patients (pts) who had a CNSGCT and survived more than 5 years. Median age of initial Tx was 15.0 years and median follow-up period was 168 months (60–448 months). Results: Among these pts, 32 pts (15.4%) suffered from second neoplasm and/or cerebrovascular disease. Median age of 32 pts was 14.6 years at the initial Tx. Median interval to event was 151 months (24–456 months). The secondary events, therefore, occurred at the third decade of age. The second neoplasm included 8 cavernous angiomas, 7 GBMs, 3 meningiomas, 2 G-III glioma, 1 hemangiopericytoma, and 1 leukemia. Four cavernous angiomas caused a hematoma. The cerebrovascular disease included 14 steno-occlusive diseases of circle of Willis, 1 aneurysm, and 1 dural AVF. Four pts sufferred from both neoplasum and cerebrovascular disease. All 32 pts had previously received radiotherapy and 6 pts had undergone chemotherapy. Radiation field included whole ventricle system or whole brain involving basal cistern with the dose of more than 40 Gy, except for one who received 24 Gy followed by P-E chemotherapy. Eight of 32 pts died and 14 pts had additional sequelae due to these secondary events. Conclusions: The risk of lethal malignant neoplasm and disabling cerebarovascular disease after Tx for CNSGCTs is extremely large. Long-term follow-up system to monitor and prevent late sequelae should be established. No significant financial relationships to disclose.