Cited by 61Glioma Diagnosis and TreatmentPharmacovigilance and Adverse Drug ReactionsElectromagnetic Fields and Biological Effects

Global post-marketing safety surveillance of Tumor Treating Fields (TTFields) in patients with high-grade glioma in clinical practice

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Shi, Wenyin, Blumenthal, Deborah T., Oberheim Bush, Nancy Ann, Kebir, Sied, Lukas, Rimas V., Muragaki, Yoshihiro, Zhu, Jay-Jiguang, Glas, Martin·2020·Journal of Neuro-Oncology

Abstract

INTRODUCTION: Tumor Treating Fields (TTFields; antimitotic treatment) delivers low-intensity, intermediate-frequency, alternating electric fields through skin-applied transducer arrays. TTFields (200 kHz) was FDA-approved in glioblastoma (GBM), based on the phase 3 EF-11 (recurrent GBM, rGBM) and EF-14 (newly diagnosed GBM, ndGBM) trials. The most common TTFields-related adverse event (AE) in both trials was array-associated skin irritation. We now report on TTFields-related AEs in the real-world, clinical practice setting. METHODS: Unsolicited, post-marketing surveillance data from TTFields-treated patients (October 2011-February 2019) were retrospectively analyzed using MedDRA v21.1 preferred terms, stratified by region (US, EMEA [Europe, Middle East, Africa], Japan), diagnosis (ndGBM, rGBM, anaplastic astrocytoma/oligodendroglioma, other brain tumors), and age (< 18 [pediatric], 18-64 [adults], ≥ 65 [elderly]; years of age). RESULTS: Of 11,029 patients, 53% were diagnosed with ndGBM and 39% were diagnosed with rGBM at any line of disease recurrence. Most were adults (73%), 26% were elderly, and the male-to-female ratio was ~ 2:1 (close to published ratios of typical GBM populations). The most commonly reported TTFields-related AE was array-associated skin reaction, occurring in patients with ndGBM (38%), rGBM (29%), anaplastic astrocytoma/oligodendroglioma (38%), and other brain tumors (31%); as well as 37% of pediatric, 34% of adult, and 36% of elderly patients. Most skin AEs were mild/moderate and manageable. Other TTFields-related AEs in patients with ndGBM/rGBM included under-array heat sensation (warmth; 11%, 10%, respectively) and electric sensation (tingling; 11%, 9%, respectively), and headache (7%, 6%, respectively). CONCLUSIONS: This TTFields safety surveillance analysis in > 11,000 patients revealed no new safety concerns, with a favorable safety profile comparable with published TTFields/GBM trials. The safety profile remained consistent among subgroups, suggesting feasibility in multiple populations, including elderly patients.

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  • Data from clinical trials and extensive safety studies in healthy animals have shown that TTFields are not associated with significant systemic toxicities.

    “Although we have not tested the effect of TTFields on cytoskeletal architecture of non-cancerous cells, data from clinical trials and extensive safety studies in healthy animals have shown that TTFields are not associated with significant systemic toxicities [7,37].”

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  1. [29]Lacouture M, Iwamoto F, Armentano F, Kim E (2016) Mitigating skin irritations with tumor treating fields therapy in glioblastoma. Oncology nursing society annual conference, Washington, DC

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Authors
Shi, W., Blumenthal, D. T., Oberheim Bush, N. A., Kebir, S., Lukas, R. V., Muragaki, Y., Zhu, J.-J., & Glas, M.
Affiliations
  • Thomas Jefferson University (US)
  • Tel Aviv University (IL)
  • Essen University Hospital (DE)
  • Northwestern University (US)
  • Tokyo Women's Medical University (JP)
  • Memorial Hermann (US)
Corresponding author
Shi, Wenyin
Venue
Journal of Neuro-Oncology
Published
2020-06-13
Volume
148
Issue
3
Pages
489-500
ISSN
  • 0167-594X (ISSN-L)
  • 1573-7373
OpenAlex
W3034397908
Cited by
61
References
44
Citations by year
2026: 8 · 2025: 6 · 2024: 9 · 2023: 8 · 2022: 18 · 2021: 10 · 2020: 2
FWCI
4.91
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuro-Oncology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion, cc-by)
Funders
Novocure Inc
Topics
  • Health Sciences › Medicine › Genetics › Glioma Diagnosis and Treatment
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Pharmacovigilance and Adverse Drug Reactions
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Electromagnetic Fields and Biological Effects
Keywords
fields, tumor treating fields, glioblastoma, high-grade glioma, adverse events, skin irritation, post-marketing surveillance, real-world clinical practice, anaplastic astrocytoma, oligodendroglioma, brain tumors, antimitotic therapy, heat sensation, headache, pediatric patients, elderly patients, safety profile
MeSH terms
Adolescent, Adult, Aged, Aged, 80 and over, Brain Neoplasms, Child, Child, Preschool, Electric Stimulation Therapy, Female, Follow-Up Studies, Glioma, Humans, Male, Middle Aged, Practice Patterns, Physicians', Product Surveillance, Postmarketing, Retrospective Studies, Global Health, Young Adult, Neoplasm Grading, Patient Safety

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