HOUT-30. TUMOR TREATING FIELDS (TTFIELDS) IN COMBINATION WITH LOMUSTINE (CCNU) AND TEMOZOLOMIDE (TMZ) IN PATIENTS WITH NEWLY DIAGNOSED GLIOBLASTOMA (GBM). (5th November 2018)

• Record Type: Journal Article
• Authors: Lazaridis, Lazaros; Schäfer, Niklas; Kebir, Sied; Weller, Johannes; Tzaridis, Theophilos-Dimitrios; Scheffler, Björn; Pierscianek, Daniela; Kleinschnitz, Christoph; Stuschke, Martin; Sure, Ulrich; Herrlinger, Ulrich; Glas, Martin
• Is Part Of: Neuro-oncology. Volume 20(2018)Supplement 6
• Page Start: vi119
• Page End: vi120
• Publication Date: 2018-11-05
• Subjects: Brain Neoplasms -- Periodicals; Brain -- Tumors -- Periodicals; Brain -- Cancer -- Periodicals; Nervous system -- Cancer -- Periodicals; 616.99481
• DOI: 10.1093/neuonc/noy148.498
• Languages: English
• ISSNs: 1522-8517

Abstract

Abstract: INTRODUCTION: TTFields in combination with TMZ showed significant survival benefit for newly diagnosed glioblastoma patients in the EF-14 trial, compared to TMZ standard therapy; independent of MGMT-promotor methylation-status, age and performance status. Recently, the CeTeG trial (NOA-09) demonstrated improved efficacy of lomustine (CCNU)/TMZ compared to TMZ standard therapy in newly diagnosed MGMT-promotor methylated GBM patients. Given that TTFields demonstrated a strong safety profile as well as a high potential being combined with other modalities and the very promising results for GBM patients with methylated MGMT-promotor in the CeTeG trial, there is a strong rationale in combining these modalities. This is the first report on patients, treated with a combination of both treatment regimens, TTFields and CCNU/TMZ. METHODS: Patients with newly diagnosed GBM and MGMT-promoter methylation were treated after surgery and radiochemotherapy with a combination of TTFields plus CCNU/TMZ at our institutions. Patients with complete resection (N=4), partial resection (N=3) as well as biopsy (N=1) were included in the analysis. We assessed safety and feasibility of this combined therapy. RESULTS: Currently, eight patients (medians: age 49, [39–69]; KPS 90, [70–100]) have been treated and analyzed: GBM IDH mutant (N=2), IDH wild-type (N=6). To-date, CTCAE grade 3 hematotoxicities were observed in two patients, but were not considered to be related to the addition of TTFields to CCNU/TMZ. No further non-hematologic toxicity was observed. In one patient a grade 3 event (herpes zoster) emerged. Regarding medical device site reactions, low-grade skin irritations were detected in four patients (50%), corresponding to the safety analysis from the EF-14 trial with low-grade skin irritations in 52% of the patients. CONCLUSION: These data provide first indications that the combination of TTFields and CCNU/TMZ is probably safe and feasible. Additional follow-up and a higher sample size are needed for further toxicity analysis and efficacy assessment of this combination.