GCT-01. CENTRAL NERVOUS SYSTEM GERM CELL TUMORS – GENERATING A CONSENSUS IN THEIR DIAGNOSIS AND MANAGEMENT

Abstract

Abstract BACKGROUND Despite the excellent outcomes of central nervous system (CNS) germ cell tumors (GCTs), there still exists significant differences in how GCTs are diagnosed and managed in different parts of the world. Additionally, the long-term toxicities and morbidities of the current therapies, and their substantial negative impact on the social wellbeing of our patients should clearly indicate that the current achievements are not enough. Further, important molecular data have emerged over the past decade that we have not witnessed their translation into any of the ongoing clinical trials. METHODS A comprehensive review of all major CNS GCT clinical trials will be discussed, in addition to a detailed review of the several issues of debate. Moreover, the latest developments in molecular landscape of GCTs will be provided in order to identify the hurdles that affect their incorporation in GCT clinical trials. RESULTS Tumor marker cut-offs that differentiate between germinoma and non-germinomatous germ cell tumors are clearly different between the various groups around the world. Additionally, differences exist in the chemotherapy backbones, radiation therapy field and dose, and the appropriate regimens to treat some of the rarer GCTs. Furthermore, there is no clear guideline on how to treat patients who do not achieve complete response after chemotherapy. CONCLUSIONS Discussing the clear differences that exist in the diagnosis and management of CNS GCTs is a critical first step in generating a clear consensus between the North American, European, Asian, and Latin American groups, which will certainly guide future clinical trials, improve the outcomes as well as the long-term treatment effects for this group of patients.