A stereo EEG study in a patient with sleep-related hypermotor epilepsy due to DEPDC5 mutation.

A stereo EEG study in a patient with sleep-related hypermotor epilepsy due to DEPDC5 mutation.

Seizure. 2017 Nov 04;53:51-54

Authors: Ferri L, Bisulli F, Mai R, Licchetta L, Leta C, Nobili L, Mostacci B, Pippucci T, Tinuper P

Abstract
PURPOSE: Dishevelled EGL-10 and pleckstrin domain-containing protein 5 (DEPDC5) mutations are found in a wide spectrum of focal epilepsies ranging from epilepsy caused by malformation of cortical development to non-lesional epilepsy, including sleep-related hypermotor epilepsy (SHE). A surgical approach has been anecdotally reported in patients with DEPDC5 mutations, but most of these cases had a lesional etiology.
METHODS: We describe a stereo-EEG (SEEG) study in a patient with drug-resistant/non-lesional SHE. Patient was screened for known mutations associated with SHE.
RESULTS: SEEG disclosed bilateral synchronous and independent activity prevailing on the right central-anterior cingulate cortex, without a clear spatially defined epileptogenic zone. Due to the lack of a clear epileptogenic zone, surgery was contraindicated. Years later a DEPDC5 mutation was identified.
CONCLUSION: We suggest that genetic analysis should be considered before performing SEEG study in a patient with drug resistant non-lesional SHE, in the presence of seizures in wakefulness and unclear anatomo-electroclinical correlation. If DEPDC5 mutations are identified, the presurgical evaluation should be tailored to look for MRI-negative focal cortical dysplasia and a wide epileptogenic network. The appropriate management and potential benefit of surgery for genetic non-lesional epilepsy have yet to be clarified.

PMID: 29125946 [PubMed - as supplied by publisher]

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