John Libbey Eurotext

Deterioration of dyslexia after non-dominant temporal lobectomy for drug-resistant epilepsy Volume 18, issue 1, March 2016


  • Figure 1


1 Department of Neurosurgery, Maastricht University Medical Centre, Maastricht
2 Academic Centre for Epileptology, Kempenhaeghe/Maastricht University Medical Centre, Heeze/Maastricht
3 Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen
4 Department of Neurology, Maastricht University Medical Centre, Maastricht
5 Department of Clinical Neurophysiology, Maastricht University Medical Centre, Maastricht
6 Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
* Correspondence: Roel H.L. Haeren Department of Neurosurgery, Maastricht University Medical Centre, PO box 5800, 6202 AZ Maastricht,

We present a patient with drug-resistant right-sided temporal lobe epilepsy, caused by a ganglioglioma of the parahippocampal gyrus. Preoperatively, the patient was also known to have dyslexia. A right-sided anterior temporal lobectomy, including complete lesionectomy, was performed. Several months after the otherwise uncomplicated procedure, the patient complained about visual memory disturbances, accompanied by increased reading and spelling problems. Postoperative neuropsychological examination revealed deterioration of the visual memory functions, compared to the preoperative assessment, and consequently provided a possible explanation for worsening of the pre-existing dyslexia. In this case report, we hypothesize on the cause of this unusual deterioration and present recommendations to be included in the preoperative epilepsy surgery evaluation for patients with verbal or reading disorders such as dyslexia.