Abstract
Eyelid myoclonia with absences is recently included in the category of childhood epileptic syndromes. It is clinically characterized by brief seizures of eyelid myoclonia, sometimes followed by absences, and it is associated to EEG generalized discharges of polyspikes or polyspike-waves, which are triggered by eyes closure in a well-lit room. This epileptic syndrome probably has a genetic origin, as well as other genetic generalized epilepsies, in particular photosensitive epilepsies. We describe the case of a patient affected by eyelid myoclonia with absences, intellectual disability, and attention deficit hyperactivity disorder (ADHD), with a de novo mutation of the RORB gene (retinoid-related orphan receptor β); this gene is involved in vivo in different neuronal processes among which are migration and differentiation. We suggest that its mutation in our patient can be considered the cause of the aberrant functioning of the cerebral cortex, which is clinically expressed by epilepsy and neurodevelopment disorders.
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References
Striano S, Striano P, Nocerino C, Boccella P, Bilo L, Meo R, Ruosi P (2002) Eyelid myoclonia with absences: an overlooked epileptic syndrome? Neurophysiol Clin 32:287–296
Fisher RS, Cross H, D'Souza C, French JA, Haut S, Higurashi N et al (2019) 2017 International League Against Epilepsy classifications of seizures and epilepsy are steps in the right direction. Epilepsia 60(6):1040–1044
Liu H, Aramaki M, Fu Y, Forrest D (2017)Retinoid-related orphan receptor β and transcriptional control of neuronal differentiation. Curr Top Dev Biol 125:227–255
Rudolf G, Lesca G, Mehrjouy MM, Labalme A, Salmi M, Bache I, Bruneau N, Pendziwiat M et al (2016) Loss of function of the retinoid-related nuclear receptor (RORB) gene and epilepsy. Eur J Hum Genet 24(12):1761–1770
Sadleir LG, de Valles-Ibáñez G, King C, Coleman M, Mossman S, Paterson S, Nguyen J, Berkovic SF, Mullen S, Bahlo M, Hildebrand MS, Mefford HC, Scheffer IE (2020) Inherited RORB pathogenic variants: overlap of photosensitive genetic generalized and occipital lobe epilepsy. Epilepsia 61(4):e23–e29
Posner J, Polanczyk GV, Sonuga-Barke E (2020)Attention-deficit hyperactivity disorder. Lancet 395(10222):450–462
Boudry-Labis E, Demeer B, Le Caignec C, Isidor B, Mathieu-Dramard M, Plessis G et al (2013) A novel microdeletion syndrome at 9q21.13 characterised by mental retardation, speech delay, epilepsy and characteristic facial features. Eur J Med Genet 56(3):163–170
Adachi M, Inoue T, Tsuneishi S, Takada S, Nakamura H (2005) Eyelid myoclonia with absences in monozygotic twins. Pediatr Int 47:343–347
Striano S, Capovilla G, Sofia V, Romeo A, Rubboli G et al (2009) Eyelid myoclonia with absences (Jeavons syndrome): a well-defined idiopathic generalized epilepsy syndrome or a spectrum of photosensitive conditions? Epilepsia 50(Suppl 5):15–19
Nuyts S, D'Souza W, Bowden SC, Vogrin SJ (2017) Structural brain abnormalities in genetic generalized epilepsies: A systematic review and meta-analysis. Epilepsia 58(12):2025–2037
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Morea, A., Boero, G., Demaio, V. et al. Eyelid myoclonia with absences, intellectual disability and attention deficit hyperactivity disorder: a clinical phenotype of the RORB gene mutation. Neurol Sci 42, 2059–2062 (2021). https://doi.org/10.1007/s10072-020-05031-y
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DOI: https://doi.org/10.1007/s10072-020-05031-y