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Role of surgical resection in recurrent glioblastoma: prognostic factors and outcome evaluation in an observational study

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The role of surgical resection in progressive or recurrent glioblastoma multiforme (GBM) lack of high level of evidence. The aim of this evaluation was to assess the role of surgical resection in relapsing GBM, in relation to the extent of surgical resection (EOR) and the amount of residual tumor volume (RTV). Among patients treated for newly diagnosed GBM between September 2008–December 2014, 64 patients with recurrent GBM were included in this retrospective evaluation. All patients underwent surgical resection followed by adjuvant treatments, chemotherapy and/or radiotherapy Results were evaluated in terms of local control (LC) rate, progression free survival (PFS) and patients overall survival (OS). Gross total resection (GTR) (>90%) was achieved in 48 (75%) patients and subtotal resection (STR) in 16 (25%). RTV was 0 in 40 (62.5%) patients and >0 in 24 (37.5%). No severe postoperative morbidity occurred. The median LC time was 6.0 ± 0.1 months (95% CI 5.29–8.55), with a 1 and 2 years LC rate of 29.4 ± 6.9%. The median PFS time was 6.8 ± 0.8 months, with a 1 year PFS rate of 27.2 ± 7.2% (95% CI 14.2–41.9). The median OS time was 10.3 ± 0.5 months (95% CI 7.6–10.4) with a 1 and 2 years OS rate of 22.5 ± 6.7% (95% CI 10.9–36.6). On univariate analysis EOR and RTV were recorded as conditioning LC and survival. These data was confirmed also in multivariate analysis only for RTV (p < 0.01). Recurrent GBM can take advantage of repeated surgery in selected patients with younger age and good clinical status. The entity of surgical resection was confirmed as conditioning survival.

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Correspondence to Luca Cozzi.

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L. Cozzi acts as Scientific Advisor to Varian Medical Systems and is Clinical Research Scientist at Humanitas Cancer Center. All other co-authors have no conflicts of interest.

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Pessina, F., Navarria, P., Cozzi, L. et al. Role of surgical resection in recurrent glioblastoma: prognostic factors and outcome evaluation in an observational study. J Neurooncol 131, 377–384 (2017).

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