J Neurol Surg A Cent Eur Neurosurg 2020; 81(02): 138-146
DOI: 10.1055/s-0040-1701625
Original Article
Georg Thieme Verlag KG Stuttgart · New York

When Right Is on the Left (and Vice Versa): A Case Series of Glioma Patients with Reversed Lateralization of Cognitive Functions

Authors

  • Emmanuel Mandonnet

    1   Department of Neurosurgery, Lariboisière Hospital, Paris, France
    2   University Paris 7, Paris, France
    3   Frontlab, INSERM, Institut du Cerveau et de la Moelle (ICM), Paris, France
  • Charles Mellerio

    4   Imaging center Centre Cardiologique du Nord (CCN), Saint-Denis, France
  • Marion Barberis

    1   Department of Neurosurgery, Lariboisière Hospital, Paris, France
  • Isabelle Poisson

    1   Department of Neurosurgery, Lariboisière Hospital, Paris, France
  • Johan Martijn Jansma

    5   Department of Neurosurgery, Elisabeth-Tweesteden Hospital, Tilburg, The Netherlands
  • Geert-Jan Rutten

    5   Department of Neurosurgery, Elisabeth-Tweesteden Hospital, Tilburg, The Netherlands
Further Information

Publication History

11 December 2018

22 October 2019

Publication Date:
17 February 2020 (online)

Abstract

We report a case series of four patients operated on for a glioma in awake conditions and in whom task-based functional magnetic resonance imaging (fMRI) demonstrated right-dominant activity during a language production task. Language functional sites were identified intraoperatively by electrical stimulations only in the patient with a right-sided lesion. Furthermore, the pre- or postoperative cognitive evaluations in the three patients operated on for a left-sided glioma revealed right spatial neglect and dysexecutive syndrome, hence demonstrating that, in patients with right-dominant activity on language fMRI, the left hemisphere is implicated in spatial consciousness and cognitive control. This study supports the interest of presurgical task-based language fMRI to identify patients with a reversed lateralization of cognitive functions and to make an adequate selection of the battery of intraoperative cognitive tasks to be monitored in those rare outliers.