Salvage radiation therapy for intracranial germinoma recurring after primary chemotherapy.

Systemic chemotherapy has been increasingly used in the primary treatment of intracranial germinoma. However, the recurrence rate seems to be very high after treatment with chemotherapy alone. We used radiation to treat 5 patients harboring intracranial germinoma that recurred following primary chemotherapy. They had received systemic chemotherapy (4 with cisplatin plus etoposide and 1 with adriamycin, vincristine, cyclophosphamide, prednisolone, and cisplatin) 7-24 months before referral. All patients were treated with conventional radiotherapy directed to the primary tumor site or the craniospinal axis with a dose to the primary site ranging from 39.6 to 47.0 Gy (mean, 42.6 Gy). Response to radiation of all the recurrent tumors was good and all tumors disappeared on diagnostic imaging below the dose of 24 Gy. All patients are alive without further recurrence at 61-129 months after salvage radiotherapy. Germinomas recurring after primary chemotherapy do not seem to have acquired cross resistance to radiotherapy. They can usually be cured by standard radiation therapy with 40-47 Gy.