• Isabelle M Germano, Derek R Johnson, Hayes H Patrick, Abigail L Goodman, Mateo Ziu, D Ryan Ormond, and Jeffrey J Olson.
• Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
• Neurosurgery. 2022 May 1; 90 (5): e112e115e112-e115.

BackgroundThe Institute of Medicine best practice recommendation to review guidelines every 5 years is followed by the Congress of Neurological Surgeons Guidelines Committee. The aim of this work was to provide an updated literature review and evidence-based recommendations on the topic of diagnosis and treatment of patients with progressive glioblastoma (pGBM).ObjectiveTo review the literature published since the last guidelines on pGBM dated 2014, with literature search ending in June 2012.MethodsPubMed, Embase, and Cochrane were searched for the period July 1, 2012, to March 31, 2019, using search terms and search strategies to identify pertinent abstracts. These were then screened using published exclusion/inclusion criteria to identify full-text review articles. Evidence tables were constructed using data derived from full-text reviews and recommendations made from the evidence derived.ResultsFrom the total 8786 abstracts identified by the search, 237 full-text articles met inclusion/exclusion criteria and were included in this update. Two new level II recommendations derived from this work. For the diagnosis of patients with GBM, the use of diffusion-weighted images is recommended to be included in the magnetic resonance images with and without contrast used for surveillance to detect pGBM. For the treatment of patients with pGBM, repeat cytoreductive surgery is recommended to improve overall survival. An additional 21 level III recommendations were provided.ConclusionRecent published literature provides new recommendations for the diagnosis and treatment of pGBM. The Central Nervous System Guidelines Committee will continue to pursue timely updates to further improve the care of patients with diagnosis.https://www.cns.org/guidelines/browse-guidelines-detail/guidelines-management-of-progressive-glioblastoma.Copyright © Congress of Neurological Surgeons 2022. All rights reserved.

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