Document Type


Publication Date


Publication Title

CNS Oncol


Adult; Aftercare; Aged; Aged, 80 and over; Antineoplastic Agents, Alkylating; Antineoplastic Agents, Immunological; Bevacizumab; Brain Neoplasms; Combined Modality Therapy; Dacarbazine; Electric Stimulation Therapy; Female; Glioblastoma; Humans; Male; Middle Aged; Neoplasm Recurrence, Local; Neurosurgical Procedures; Radiotherapy; Survival Analysis; Temozolomide; Treatment Outcome; Young Adult


BACKGROUND: This post hoc analysis of the EF-14 trial (NCT00916409) of tumor-treating fields (TTFields) plus temozolomide versus temozolomide alone in newly diagnosed glioblastoma compared the efficacy of TTFields plus chemotherapy (physician's choice) versus chemotherapy alone after first recurrence.

METHODS: Patients on TTFields plus temozolomide continued TTFields plus second-line chemotherapy after first recurrence. Some patients on temozolomide alone crossed over after approval of TTFields for recurrent GBM. The primary efficacy outcome was overall survival (OS).

RESULTS: After disease progression, 131 patients received TTFields plus chemotherapy and 73 chemotherapy alone. Thirteen patients in the original temozolomide-alone group crossed over to receive TTFields plus chemotherapy after disease progression, resulting in 144 patients receiving TTFields plus chemotherapy and 60 chemotherapy alone. Median follow-up was 12.6 months. Bevacizumab, alone or with cytotoxic chemotherapy, was the most frequent treatment. Median OS in the TTFields plus chemotherapy group was significantly longer versus chemotherapy alone (11.8 vs 9.2 months; HR: 0.70; 95% CI, 0.48-1.00; p=0.049). TTFields showed a low toxicity safety profile, as previously reported, with no grade 3/4 device-related adverse events.

CONCLUSION: TTFields plus chemotherapy after first disease recurrence on TTFields plus temozolomide or temozolomide alone prolonged OS in patients in the EF-14 trial.

Clinical Institute


Clinical Institute

Neurosciences (Brain & Spine)