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Recurrent Low-Grade Gliomas: Does Reoperation Affect Neurocognitive Functioning?

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Neurosurgery 2022 Feb 1;90(2):221-232. doi: 10.1227/NEU.0000000000001784.

Recurrent Low-Grade Gliomas: Does Reoperation Affect Neurocognitive Functioning?

Sam Ng 1 2Anne-Laure Lemaitre 1 2Sylvie Moritz-Gasser 1 2 3Guillaume Herbet 1 2 3Hugues Duffau 1 2Affiliations expand

Abstract

Background: Reoperations in patients with recurrent low-grade gliomas (RLGG) were proposed to control tumor residual and delay the risk of malignant transformation over time.

Objective: To investigate neurocognitive outcomes in patients with RLGG who underwent a second surgery with awake monitoring.

Methods: In this retrospective study, patients who underwent a second awake surgery for RLGG were included. Patients had presurgical and 3-mo postsurgical neuropsychological assessments. Data were converted into Z-scores and combined by the cognitive domain. Number of patients with cognitive deficits (Z-score <-1.65), variations of Z-scores, and extent of resection (EOR) were analyzed.

Results: Sixty-two patients were included (mean age: 41.2 ± 10.0 yr). None had permanent neurological deficits postoperatively. Eight patients (12.9%) had a cognitive deficit preoperatively. Four additional patients (6.5%) had a cognitive deficit 3 mo after reoperation. Among other patients, 13 (21.0%) had a mild decline without cognitive deficits while 29 (46.8%) had no change of their performances and 8 (12.9%) improved. Overall, 94.2% of the patients returned to work. There were no correlations between EOR and Z-scores. Total/subtotal resections were achieved in 91.9% of the patients (mean residual: 3.1 cm3). Fifty-eight patients (93.5%) were still alive after an overall follow-up of 8.3 yr.

Conclusion: Reoperation with awake monitoring in patients with RLGG was compatible with an early recovery of neuropsychological abilities. Four patients (6.5%) presented a new cognitive deficit at 3 mo postoperatively. Total/subtotal resections were achieved in most patients. Based on these favorable outcomes, reoperation should be considered in a more systematic way.

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References

  1. Louis DN, Perry A, Reifenberger G, et al. The 2016 World Health organization classification of tumors of the central nervous system: a summary. Acta Neuropathol (Berl). 2016;131(6):803-820.

Editor do blog: Julio Pereira – Neurocirugião – São Paulo CRM/SP 163.113 Site para Consulta: https://www.julio-pereira.com/ Consultório: (11)99503-8838 (WhatsApp) / (11)4200-2300 Atuando no Hospital Sírio-Libanês e na BP – A Beneficência Portuguesa de São Paulo.

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