PMID- 33215088 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20231112 IS - 2632-2498 (Electronic) IS - 2632-2498 (Linking) VI - 2 IP - 1 DP - 2020 Jan-Dec TI - OptimalTTF-1: Enhancing tumor treating fields therapy with skull remodeling surgery. A clinical phase I trial in adult recurrent glioblastoma. PG - vdaa121 LID - 10.1093/noajnl/vdaa121 [doi] LID - vdaa121 AB - BACKGROUND: Preclinical studies suggest that skull remodeling surgery (SR-surgery) increases the dose of tumor treating fields (TTFields) in glioblastoma (GBM) and prevents wasteful current shunting through the skin. SR-surgery introduces minor skull defects to focus the cancer-inhibiting currents toward the tumor and increase the treatment dose. This study aimed to test the safety and feasibility of this concept in a phase I setting. METHODS: Fifteen adult patients with the first recurrence of GBM were treated with personalized SR-surgery, TTFields, and physician's choice oncological therapy. The primary endpoint was toxicity and secondary endpoints included standard efficacy outcomes. RESULTS: SR-surgery resulted in a mean skull defect area of 10.6 cm(2) producing a median TTFields enhancement of 32% (range 25-59%). The median TTFields treatment duration was 6.8 months and the median compliance rate 90%. Patients received either bevacizumab, bevacizumab/irinotecan, or temozolomide rechallenge. We observed 71 adverse events (AEs) of grades 1 (52%), 2 (35%), and 3 (13%). There were no grade 4 or 5 AEs or intervention-related serious AEs. Six patients experienced minor TTFields-induced skin rash. The median progression-free survival (PFS) was 4.6 months and the PFS rate at 6 months was 36%. The median overall survival (OS) was 15.5 months and the OS rate at 12 months was 55%. CONCLUSIONS: TTFields therapy combined with SR-surgery and medical oncological treatment is safe and nontoxic and holds the potential to improve the outcome for GBM patients through focal dose enhancement in the tumor. CI - (c) The Author(s) 2020. Published by Oxford University Press, the Society for Neuro-Oncology and the European Association of Neuro-Oncology. FAU - Korshoej, Anders Rosendal AU - Korshoej AR AUID- ORCID: 0000-0003-4285-8171 AD - Department of Neurosurgery, Aarhus University Hospital, Aarhus, Denmark. AD - Department of Clinical Medicine, Aarhus University, Aarhus, Denmark. FAU - Lukacova, Slavka AU - Lukacova S AD - Department of Oncology, Aarhus University Hospital, Aarhus, Denmark. FAU - Lassen-Ramshad, Yasmin AU - Lassen-Ramshad Y AD - Danish Centre for Particle Therapy, Aarhus University Hospital, Aarhus, Denmark. FAU - Rahbek, Christian AU - Rahbek C AD - Department of Neuroradiology, Aarhus University Hospital, Aarhus Denmark. FAU - Severinsen, Kare Eg AU - Severinsen KE AD - Department of Neurology, Aarhus University Hospital, Aarhus, Denmark. FAU - Guldberg, Trine Lignell AU - Guldberg TL AD - Department of Oncology, Aalborg University Hospital, Aalborg, Denmark. FAU - Mikic, Nikola AU - Mikic N AD - Department of Neurosurgery, Aarhus University Hospital, Aarhus, Denmark. AD - Department of Clinical Medicine, Aarhus University, Aarhus, Denmark. FAU - Jensen, Mette Haldrup AU - Jensen MH AD - Department of Neurosurgery, Aarhus University Hospital, Aarhus, Denmark. FAU - Cortnum, Soren Ole Stigaard AU - Cortnum SOS AD - Department of Neurosurgery, Aarhus University Hospital, Aarhus, Denmark. FAU - von Oettingen, Gorm AU - von Oettingen G AD - Department of Neurosurgery, Aarhus University Hospital, Aarhus, Denmark. FAU - Sorensen, Jens Christian Hedemann AU - Sorensen JCH AD - Department of Clinical Medicine, Aarhus University, Aarhus, Denmark. LA - eng PT - Journal Article DEP - 20200915 PL - England TA - Neurooncol Adv JT - Neuro-oncology advances JID - 101755003 PMC - PMC7660275 OTO - NOTNLM OT - craniectomy OT - glioblastoma OT - neuro-oncology OT - neurosurgery OT - tumor treating fields EDAT- 2020/11/21 06:00 MHDA- 2020/11/21 06:01 PMCR- 2020/09/15 CRDT- 2020/11/20 05:50 PHST- 2020/11/20 05:50 [entrez] PHST- 2020/11/21 06:00 [pubmed] PHST- 2020/11/21 06:01 [medline] PHST- 2020/09/15 00:00 [pmc-release] AID - vdaa121 [pii] AID - 10.1093/noajnl/vdaa121 [doi] PST - epublish SO - Neurooncol Adv. 2020 Sep 15;2(1):vdaa121. doi: 10.1093/noajnl/vdaa121. eCollection 2020 Jan-Dec.