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Mild Lafora disease: Clinical, neurophysiologic, and genetic findings.

Authors :
Ferlazzo, Edoardo
Canafoglia, Laura
Michelucci, Roberto
Gambardella, Antonio
Gennaro, Elena
Pasini, Elena
Riguzzi, Patrizia
Plasmati, Rosaria
Volpi, Lilia
Labate, Angelo
Gasparini, Sara
Villani, Flavio
Casazza, Marina
Viri, Maurizio
Zara, Federico
Minassian, Berge A.
Turnbull, Julie
Serratosa, Jose M.
Guerrero‐López, Rosa
Franceschetti, Silvana
Source :
Epilepsia (Series 4); Dec2014, Vol. 55 Issue 12, pe129-e133, 5p
Publication Year :
2014

Abstract

We report clinical, neurophysiologic, and genetic features of an Italian series of patients with Lafora disease ( LD) to identify distinguishing features of those with a slowly progressive course. Twenty-three patients with LD (17 female; 6 male) were recruited. Mean age (± SD) at the disease onset was 14.5 ± 3.9 years and mean follow-up duration was 13.2 ± 8.0 years. NHLRC1 mutations were detected in 18 patients; EPM2A mutations were identified in 5. Patients who maintained >10 years gait autonomy were labeled as 'mild' and were compared with the remaining LD patients with a typical course. Six of 23 patients were mild and presented significantly delay in the age at onset, lower neurologic disability score at 4 years after the onset, less severe seizure phenotype, lower probability of showing both photoparoxysmal response on electroencephalography ( EEG) and giant somatosensory evoked potentials, as compared to patients with typical LD. However, in both mild and typical LD patients, EEG showed disorganization of background activity and frequent epileptiform abnormalities. Mild LD patients had NHLRC1 mutations and five of six carried homozygous or compound heterozygous D146N mutation. This mutation was found in none of the patients with typical LD. The occurrence of specific NHLRC1 mutations in patients with mild LD should be taken into account in clinical practice for appropriate management and counseling. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00139580
Volume :
55
Issue :
12
Database :
Complementary Index
Journal :
Epilepsia (Series 4)
Publication Type :
Academic Journal
Accession number :
100158745
Full Text :
https://doi.org/10.1111/epi.12806