High-grade glioma of central nervous system: Single center treatment experience.

Abstract

e14040 Background: To evaluate characteristics and treatment responses of patients with high grade gliomas (HGG) in our center Methods: Medical files of patients with malignant CNS tumors between 1987-2020 were analyzed retrospectively. There were 44 patients with HGG. Results: Diagnosis of patients as follows: 21 pons glioma, 2 anaplastic astrocytoma, 11 anaplastic ependimoma, 7 glioblastoma multiforme, 1 glioblastoma, 2 gliomatosis cerebri. The median age at diagnosis was 6,5 yrs (7 – 17 yrs), M/F:25/19. Age distrubution: <5 yrs 12 patients, 5-10 yrs 18 patients, 10-18 yrs 14 patients. The most frequent complaints for pons gliomas: cranial nerve paralysis (52%), visial impairment (48%), headache (38%), power loss (43%) and speech disorder (30%). Surgery was performed to extrinsic component of mass in 3 patients of pons gliomas. For other HGG: 7 subtotal resection and 16 gross total resection had performed. Seven patients died before RT. And other 37 patients received radiotherapy. RT total doses varied between 50-60 Gy. Seven patients were not received chemotherapy, 3 of them died before chemo, and others received only RT. Chemotherapy protocoles were changed over the years: For pons gliomas, MOPP (Mechlorethamine, vincristine, prednisone, procarbazine) in 3 patients, NOPP (nitrosourea, vincristine, prednisone, procarbazine) in 2 patients, only ICE (Ifosfamide, carboplatin, cisplatin) in five patients, oral cyclophosphamide in one patient, temozolamide in one patient and temo + bevacizumab in one patient. Last 3 patients received nimotuzumab-vinorelbine after ICE and temo. For other HGGs, platin based regimens used fort he first line treatment. Temozolamide-bevacizumab, irinotecan-temsirolimus combinations were the other options as second and also third line treatments. Median progression free survival time was 6 mos (2 weeks -25 mos) for pons gliomas, for other gliomas median progression free survival time was 14 mos (0 -74 mos). For pons gliomas: Event free survival rate for 6 mos was 75%, for one year was 17%, One year, 18 mos, and two years overall survival rates were 84%, 52% and 10% respectively. For other HGGs: Event free survival rate for one year and two years were 57% and 17% respectively. One year and two years overall survival rates were 73% and 36% respectively. Conclusions: High grade glioma is a group of tumor in which still the helplessness experienced in treatment. Despite radiotherapy and chemotherapy, prognosis is very poor. The progression free and overall survival rates of patients were similar to literature. With new developments in molecular pathology, as the use of molecular target therapies, the progression free survival rates newly will improve.