EPEN-37. TREATMENT OUTCOME OF RECURRENT EPENDYMOMA IN CHILDREN IN NORTHERN EGYPT

INTRODUCTION: 1/3 of Ependymoma patients will develop recurrence with only 25% are long term survivors. Treatment is usually between surgery, radiotherapy or combinations. PATIENTS AND METHODS: Retrospective review of children with recurrent Ependymoma in northwest of Egypt between 2005 and 2019 in Alexandria School of medicine records. RESULTS: 27 patients were identified 19 of them after 2010. The median age is 9.7 years (1.5–19), with 16 males and 11 females. Pathology were 11 grade II Ependymoma and 16 anaplastic Ependymoma. 16 had gross residual disease after 1st surgery and 22 received radiotherapy initially at median dose of 53.5 Gy, 4 patients received suboptimal radiotherapy. The initial site was14 supratentorial tumors and 13 infratentorial. Median time to recurrence is 27.6 months(3–84), and recurrences were 17 local and 9 CSF disseminated, and one patient had recurrence at the scar with lung metastasis. At a median follow up of 56.6 months 14(51.8%) are still alive. Treatment was surgery only in 6(4 alive) radiotherapy alone in 2(1alive), combined in 15(9 alive) and 4 patients received neither. The best outcome were in patients with late local relapse treated with complete resection and CSI after 2010. Radiotherapy dose was between 54 to 57.3 Gy and one patient developed reirradiation injury at brain stem. 5 of the 14 living patients is having toxicity in form of hearing aids (4) and low TSH(1). CONCLUSION: Aggressive treatment of recurrent Ependymoma with surgery and radiotherapy is feasible and about half of the patients are salvageable.