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Germ cell tumor (GCT) is a rare juvenile CNS tumor that is more frequent in eastern Asia. Most survivors require continuous medical care for hormone replacement, maintenance of shunting devices, and late radiation-induced effects. In the present study, we retrospectively analyzed medical records of long-term GCT survivors, and make the health and social issues clear. Ninety-two GCT patients were treated in our institute from 1982 to 2018, and 81 patients, of which medical records are available, are included. The median follow-up period is 12.2 years, and 47 patients (58.1%) are followed for more than ten years. The overall survival rate is gradually decreasing more than ten years follow-up, such as 10-, 15- and 25-years survival are 92.3, 87.7, and 73.3%, respectively. In the long-term follow-up, eight subsequent malignancy and seven cerebrovascular events are recorded. These events occurred 20 years or more after the treatments, and six CNS malignancies were observed in survivors irradiated with 50Gy or more. As social issues, forty-two of 50 adult survivors had been employed after the treatments, but only thirty-four (70.8%) are still working. Of note, only nine (18.8% of adults) survivors got married. All four married women require any hormone replacement, while only one of 4 men requires the replacement. Long-term follow-up of GCT survivors revealed subsequent malignancy and social problems. A recent attempt to decrease the dose of irradiation might overcome some issues. As a conclusion, GCT survivors require a supporting program for not only health but also social issues.

GCT-09. HEALTH AND SOCIAL ISSUES IN THE LONG-TERM GERM-CELL TUMOR SURVIVORS