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Eur J Paediatr Neurol. 2017 Sep;21(5):783-786. doi: 10.1016/j.ejpn.2017.04.001. Epub 2017 Apr 29.

Heterogeneity of FHF1 related phenotype: Novel case with early onset severe attacks of apnea, partial mitochondrial respiratory chain complex II deficiency, neonatal onset seizures without neurodegeneration.

Author information

1
APHM, Department of Pediatric Neurology, Hopital de la Timone, Marseille, France.
2
AIx Marseille univ, INSERM, GMGF, UMR_S 910, Faculté de médecine, Marseille, France.
3
AIx Marseille univ, INSERM, GMGF, UMR_S 910, Faculté de médecine, Marseille, France. Electronic address: Laurent.villard@univ-amu.fr.
4
APHM, Department of Pediatric Neurology, Hopital de la Timone, Marseille, France; AIx Marseille univ, INSERM, GMGF, UMR_S 910, Faculté de médecine, Marseille, France. Electronic address: mathieu.milh@univ-amu.fr.

Abstract

INTRODUCTION/OBJECTIVES:

We report the case of a child prospectively followed in our institution for a severe, neonatal onset epilepsy presenting with severe attacks of apnea that were not initially recognized as seizure since they were not associated with any abnormal movement and since interictal EEG was normal. Recording of attacks using prolonged video-EEG recording allowed to confirm the diagnosis of epileptic seizures.

RESULTS:

Using whole exome sequencing we found a de novo heterozygous, missense mutation of FHF1 (p.Arg52His, NM_004113), a mutation that has been very recently described in 7 patients with an early onset epileptic encephalopathy. The initial workup showed a partial deficit of the complex II of the respiratory chain in muscle and liver. The prospective follow-up demonstrated that 2 drugs seemed to be more effective than the others: sodium blocker carbamazepine, and serotonin reuptake blocker fluoxetine. GABAergic drugs seemed to be ineffective. No drug aggravated the epilepsy.

DISCUSSION:

This case report contributes to the description of an emerging phenotype for this condition.

KEYWORDS:

Children; EEG; Early onset epileptic encephalopathy; Genetics; Seizure

PMID:
28506426
DOI:
10.1016/j.ejpn.2017.04.001
[Indexed for MEDLINE]

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