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Familial Infantile Myoclonic Epilepsy

FIME


Presentation

  • The peculiar epileptic presentation prompted us to perform direct sequencing of the TBC1D24 gene.[ncbi.nlm.nih.gov]
  • In the present study, we found that two compound heterozygous missense mutations (D147H and A509V) in TBC1D24, a gene of unknown function, are responsible for FIME.[ncbi.nlm.nih.gov]
  • ORPHA:352582 Synonym(s): FIME Familial infantile myoclonus epilepsy Prevalence: Inheritance: Autosomal recessive Age of onset: Infancy, Neonatal ICD-10: G40.3 OMIM: 605021 UMLS: - MeSH: - GARD: - MedDRA: - The documents contained in this web site are presented[orpha.net]
  • Benign (nonfamilial) infantile epilepsy presents in neurologically normal infants in the first year of life.[neupsykey.com]
Epilepsy
  • We previously described a large family with a recessive form of idiopathic epilepsy, named familial infantile myoclonic epilepsy (FIME), and mapped the disease locus on chromosome 16p13.3 by linkage analysis.[ncbi.nlm.nih.gov]
  • This entity was named "familial infantile myoclonic epilepsy" (FIME).[ncbi.nlm.nih.gov]
  • There are many manifestations of epilepsy and, therefore, a diversity of factors in underlying pathology, responses to treatment and prognosis.[books.google.de]
  • PURPOSE: To describe the clinical features of a large kindred with familial infantile myoclonic epilepsy (FIME) with autosomal recessive inheritance, and to discuss the nosology of the early infantile myoclonic epilepsies (IMEs).[ncbi.nlm.nih.gov]
  • Moreover his work on establishing the syndromic diagnosis of epilepsies and the appropriate video-EEG methodology for their diagnosis, has been regarded by some as ground breaking and he is recognised as one the leading authorities on epilepsy.[books.google.de]
Family History of Epilepsy
  • In some cases, no etiology is found and there is a family history of epilepsy. Method: The authors screened SCN1A in 24 patients with SMEI and 23 with IS.[neurology.org]
  • In a series of 88 patients with BMEI, 26.1% had a history of simple febrile seizures. 3 There is a family history of epilepsy or febrile seizures in 50% or more of patients.[mhmedical.com]
  • Although gene mutations are associated, there may or may not be a family history of epilepsy. Ohtahara syndrome and early myoclonic epilepsy of infancy. Suppression-burst pattern is the characteristic EEG pattern.[epilepsyfoundationmn.org]
  • history of epilepsy 1 (3-4% risk), 2 (13% risk) Association with mesial temporal sclerosis controversial Retrospective review of MTS shows association with prolonged febrile seizures Prospective studies on febrile seizures not showing MTS Updated: December[emilytam.com]
  • A history of febrile seizures (30 percent) and a family history of epilepsy (39 percent) is relatively common [ Roger et al., 2002 ].[clinicalgate.com]
Italian
  • Mutations in the TBC1D24 gene were first reported in an Italian family with a unique epileptic phenotype consisting of drug-responsive, early-onset idiopathic myoclonic seizures.[ncbi.nlm.nih.gov]
  • Gaslini and University of Genova, Genoa, 16147, Italy [ Davide De Pietri Tonelli ] - Department of Neuroscience and Brain Technology, Italian Institute of Technology, Genoa, 16163, Italy [ Fabrizio A. de Falco ] - U.O. Neurologia, P.O.[scipers.com]
  • […] ereid{at}hgmp.mrc.ac.uk Statistics from Altmetric.com E ditor —Benign familial infantile convulsions (BFIC) (OMIM 601764) is a recently recognised idiopathic epilepsy syndrome originally described in families of Japanese ancestry and more recently in Italian[jmg.bmj.com]
  • Benign adult familial myoclonic epilepsy (BAFME): evidence of an extended founder haplotype on chromosome 2p11.1-q12.2 in five Italian families. Neurogenetics. 2008;9(2):139–42.[link.springer.com]
  • Vaccination and occurrence of seizures in SCN1A mutation-positive patients: a multicenter Italian study. Pediatr Neurol . 2014;50(3):228–232 Copyright 2014 by the American Academy of Pediatrics View Abstract[pediatrics.aappublications.org]
Hypotension
  • […] commonly prescribed agent for the management of RSE in children however, midazolam is a new treatment option. 21 Holmes GL, Riviello JJ Jr. cont Both drugs effectively terminated refractory seizure activity, although pentobarbital use was complicated by hypotension[powershow.com]
Suggestibility
  • IEs include common disorders with a complex mode of inheritance and rare Mendelian traits suggesting the occurrence of several alleles with variable penetrance.[ncbi.nlm.nih.gov]
  • This observation combined with recent data from the literature, suggest that mutations in TBCD24 cause a pathological continuum, with FIME at the "benign" end and severe drug-refractory epileptic encephalopathy on the severe end.[ncbi.nlm.nih.gov]
  • Genetic studies suggest linkage to chromosome 16 in familial cases of true IME.[ncbi.nlm.nih.gov]
  • Conclusions: The rate of SCN1A mutations in this cohort of SMEI patients suggests that other factors may be important in SMEI.[neurology.org]
Tonic-Clonic Seizure
  • Patients presented with isolated bilateral or focal myoclonia, which could evolve to long-lasting attacks without loss of consciousness, with a peculiar reflex component, and were associated with generalized tonic-clonic seizures.[ncbi.nlm.nih.gov]
  • Conversely, onset with generalized epileptic seizures without fever (four patients) or with fever (one patient), frequency and duration of the myoclonic seizures, occurrence of generalized tonic--clonic seizures (GTCSs) in all patients and persistence[ncbi.nlm.nih.gov]
  • Generalized tonic-clonic seizures may be seen in later life. NOTE Self-limiting refers to seizures having a high likelihood of spontaneously remitting at a predictable age.[epilepsydiagnosis.org]
  • Drinking alcohol, which can lead to too little sleep and fatigue, is the strongest trigger of myoclonic jerks and tonic-clonic seizures. Flickering lights can also trigger seizures for some people.[webmd.com]
  • Multiple seizure types are present and generalized tonic-clonic seizures can be frequent. Ketogenic diet has been shown to be effective.[epilepsyfoundationmn.org]
Ataxia
  • (FXTAS); Lysosomal Storage Diseases; Psychiatric Disorders; Dominant Spinocerebellar Ataxias; Metabolic Disorders; Friedreich Ataxia; ALS; Dementia; Neuromuscular Disorders; Stroke; Epilepsy; and Dystonia.[books.google.de]
  • […] infantile myoclonic epilepsy Disease definition A rare, genetic, infantile epilepsy syndrome disease characterized by neonatal- to infancy-onset myoclonic focal seizures occurring in various members of a family, associated in some with mild dysarthria, ataxia[orpha.net]
  • , mental retardation and electrolyte imbalance, Epilepsy, ataxia, sensorineural deafness and tubulopathy, EAST syndrome, Seizures - sensorineural deafness - ataxia - intellectual disability - electrolyte imbalance, Seizures-sensorineural deafness-ataxia-intellectual[rarediseases.info.nih.gov]
  • Ankyrin-B (N105/13, N105/17) LONG QT SYNDROME 4 CARDIAC ARRHYTHMIA, ANKYRIN-B-RELATED Ataxin-1 (N76/3, N76/8) SPINOCEREBELLAR ATAXIA 1 CASK (K56A/50) MENTAL RETARDATION AND MICROCEPHALY WITH PONTINE AND CEREBELLAR HYPOPLASIA FG SYNDROME 4 MENTAL RETARDATION[neuromab.ucdavis.edu]
Ataxia
  • (FXTAS); Lysosomal Storage Diseases; Psychiatric Disorders; Dominant Spinocerebellar Ataxias; Metabolic Disorders; Friedreich Ataxia; ALS; Dementia; Neuromuscular Disorders; Stroke; Epilepsy; and Dystonia.[books.google.de]
  • […] infantile myoclonic epilepsy Disease definition A rare, genetic, infantile epilepsy syndrome disease characterized by neonatal- to infancy-onset myoclonic focal seizures occurring in various members of a family, associated in some with mild dysarthria, ataxia[orpha.net]
  • , mental retardation and electrolyte imbalance, Epilepsy, ataxia, sensorineural deafness and tubulopathy, EAST syndrome, Seizures - sensorineural deafness - ataxia - intellectual disability - electrolyte imbalance, Seizures-sensorineural deafness-ataxia-intellectual[rarediseases.info.nih.gov]
  • Ankyrin-B (N105/13, N105/17) LONG QT SYNDROME 4 CARDIAC ARRHYTHMIA, ANKYRIN-B-RELATED Ataxin-1 (N76/3, N76/8) SPINOCEREBELLAR ATAXIA 1 CASK (K56A/50) MENTAL RETARDATION AND MICROCEPHALY WITH PONTINE AND CEREBELLAR HYPOPLASIA FG SYNDROME 4 MENTAL RETARDATION[neuromab.ucdavis.edu]
Myoclonic Jerking
  • After administration of ibuprofen, body temperature dropped and myoclonic jerks completely disappeared.[movementdisorders.org]
  • One fifth of patients have photosensitivity, with myoclonic jerks precipitated by photic stimulation. In 10% of patients, myoclonic jerks may be activated by sudden noise or touch in either awake or sleep states. Ictal EEG.[medlink.com]
  • In infancy and childhood, myoclonic epilepsies comprise a heterogeneous group of epileptic syndromes characterized by myoclonic jerks only, myoclonic jerks and GTCS, myoclonic jerks and absences, and cases with myoclonic...[link.springer.com]
  • Seizures usually occur between 2-4 years of age, with myoclonic jerks and continued developmental regression. Visual failure occurs later. Some children become extremely irritable and distressed.[ucl.ac.uk]
Tremor
  • Fogel Elsevier Health Sciences, 06.11.2013 - 281 Seiten 0 Rezensionen This issue of Neurologic Clinics features a review of clinical neurogenetics as it pertains to the following disorders: Huntington Disease; Autism/ASD;Fragile X Tremor Ataxia Syndrome[books.google.de]
  • Cortical tremor (FCMTE: familial cortical myoclonic tremor with epilepsy). Neurophysiol Clin. 2006;36(5–6):345–9.[link.springer.com]
  • Fogel Elsevier Health Sciences , 6 nov. 2013 - 281 pagini 0 Recenzii This issue of Neurologic Clinics features a review of clinical neurogenetics as it pertains to the following disorders: Huntington Disease; Autism/ASD;Fragile X Tremor Ataxia Syndrome[books.google.ro]
  • She had dysmetria on nose to finger test, as well as a coarse action tremor. She continues to have involuntary jerking of upper more than lower extremities that last up to an hour.[f1000research.com]
  • Medication Percent still taking Worst side effects Other side effects Most common side effects Valproic acid 54% 13% 4% Tremor (8%); Fatigue (7%) Clonazepam 64% 4% Fatigue (8%); Hypotonia (6%) Phenobarbital 13% 20% 12% Lethargy (14%); Irritability (9%[angelman.org]

Workup

  • EEG is required to distinguish myoclonic seizures from nonictal causes of myoclonus, which can arise from lesions of the cortex, brainstem, spinal cord, or even peripheral nerve (see Workup).[emedicine.medscape.com]
Normal Interictal EEG
  • Like the benign form of infantile myoclonic epilepsy (BIME), FIME is a true idiopathic IME with unremarkable history, no neurologic or mental impairment, good response to treatment, and normal interictal EEG pattern.[ncbi.nlm.nih.gov]
  • The background EEG is normal. Interictal EEG. The interictal EEG is normal. Activation. Sleep may activate the EEG, and generalized spike-and-wave and polyspike-and-wave may occur, with or without accompanying myoclonic jerks clinically.[medlink.com]
  • .  Normal interictal EEG.  Favorable outcome.  May experience febrile myoclonus  Associated with mutations of the SCN1A sodium channel gene. 17.  Previously called early-benign childhood seizures with occipital spikes  Childhood onset (peak 5 years[slideshare.net]
  • This neurologic tenet is based on the fact that many children with seizures have normal interictal EEGs. In addition, the sensitivity of an interictal EEG for different seizure types is highly variable.[aafp.org]

Treatment

  • There are many manifestations of epilepsy and, therefore, a diversity of factors in underlying pathology, responses to treatment and prognosis.[books.google.de]
  • The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment.[orpha.net]
  • Like the benign form of infantile myoclonic epilepsy (BIME), FIME is a true idiopathic IME with unremarkable history, no neurologic or mental impairment, good response to treatment, and normal interictal EEG pattern.[ncbi.nlm.nih.gov]
  • Some of the services we provide include: • Brachial Plexus Palsy treatment • Cerebral Palsy treatment • Epilepsy treatment • General Neurology treatment • Movement Disorders treatment • Neurofibromatosis Center treatment • Stroke treatment • Tuberous[neuro.wustl.edu]

Prognosis

  • There are many manifestations of epilepsy and, therefore, a diversity of factors in underlying pathology, responses to treatment and prognosis.[books.google.de]
  • Prognosis The prognosis depends heavily on the underlying etiology and the epilepsy syndrome. Patients with a benign syndrome typically respond well to medication and may outgrow their epilepsy.[emedicine.medscape.com]
  • Prognosis The prognosis for children with IS is largely dependent on the underlying cause. The intellectual prognosis for children with IS is generally poor because many babies with IS have neurological impairment prior to the onset of spasms.[childneurologyfoundation.org]
  • :  An epileptic disorder characterized by a cluster of signs and symptoms customarily occurring together; these include type of seizure, etiology, anatomy, precipitating factors, age of onset, severity, chronicity, diurnal and circadian cycling and prognosis[slideshare.net]
  • With a positive prognosis and absence of cognitive sequelae, BFIS typically resolves by age 2. All of Amplexa's neurology tests can be found in our Neurology Brochure. neurology[amplexa.com]

Etiology

  • […] a gene mutation involved in autosomal-recessive idiopathic epilepsy, unveiled the involvement of ARF6-dependent molecular pathway in brain hyperexcitability and seizures, and confirmed the emerging role of subtle cytoarchitectural alterations in the etiology[ncbi.nlm.nih.gov]
  • In some cases, no etiology is found and there is a family history of epilepsy. Method: The authors screened SCN1A in 24 patients with SMEI and 23 with IS.[neurology.org]
  • Etiology Seizures associated with early myoclonic encephalopathy can be due to a number of etiologies.[emedicine.medscape.com]
  • Familial cases show autosomal dominant inheritance and have genetic etiologies in common with self-limited familial neonatal and self-limited familial neonatal-infantile epilepsies, thus these epilepsy syndromes are likely related disorders.[epilepsydiagnosis.org]

Epidemiology

  • Particular updates include full coverage of new developments in epidemiology, genetics, classification, imaging, drug therapy and other treatments.[books.google.de]
  • Página 67 - Socioeconomic characteristics of childhood seizure disorders in the New Haven area: an epidemiologic study ‎ Página 67 - Epilepsy after penetrating head injury. I. Clinical correlates: a report of the Vietnam Head Injury Study.[books.google.es]
  • Epidemiology Although BFIE cases have been reported worldwide, prevalence and incidence remain unknown. In an Argentinian case series, BFIE have been listed as the third most common type of epilepsy in the first two years of life.[rarediseases.info.nih.gov]
  • [Epidemiological and clinical study of West syndrome in Nagasaki Prefecture, Japan]. No To Hattatsu. 2001;33(1):15-20.Ormrod D, McClellan K. Topiramate: a review of its use in childhood epilepsy.[malattierare.regione.veneto.it]
  • Epidemiology The incidence of myoclonic epilepsy is approximately 1 case in 40,000 children. Typically, the onset of these disorders is during the first 3 years of life.[emedicine.medscape.com]
Sex distribution
Age distribution

Pathophysiology

  • Pathophysiology Myoclonic seizures are generally the product of hypersynchronous, generalized cortical discharges. These discharges arise from hyperexcitable neuronal networks.[emedicine.medscape.com]
  • The author presents clinical and EEG manifestations, epidemiology, pathophysiology, differential diagnosis, and management of this rather benign early onset idiopathic myoclonic epilepsy.[medlink.com]
  • Although the exact pathophysiology is unknown, mutations in cystatin B appear to lead to accelerated apoptosis, which may explain the progressive neurologic decline [ Delgado-Escueta et al., 2001 ].[clinicalgate.com]
  • Can Fam Physician 2000, 461817-23 inform primary care physicians about GCSE emphasizing definition, pathophysiology, treatment, and prognosis MEDLINE (1994 to 1999 479 references MeSH "status epilepticus" and "treatment selected 30 English-language articles[powershow.com]
  • While these gene discoveries initially had no direct link to the more severe epileptic encephalopathies, they laid the general pathophysiological concept, such as the channelopathy concept of the human epilepsies [Steinlein, 2004], which eventually provided[karger.com]

Prevention

  • Hospital for Sick Children Health A-Z Search a complete list of child health articles expand_more View All Drug A-Z Search a list of articles about medications expand_more View All Learning Hubs Browse a complete list of content groups Healthy Living & Prevention[aboutkidshealth.ca]
  • AEDs are used to prevent recurrent seizures.[stlukes-stl.com]
  • Research The NINDS supports broad and varied programs of research on epilepsy and other seizure disorders aimed at discovering new ways to prevent, diagnose, and treat these disorders.[childneurologyfoundation.org]
  • This DNA vaccine has the potential to be a safe and effective therapy to prevent Alzheimer disease. He described Machado-Joseph disease (MJD), an autosomal dominant ataxia, with William Nyhan, M.D. Ph.D, in 1976, for the first time.[books.google.ro]
  • In addition, parents should also be aware that these drugs may prevent recurrences but do not alter the long-term prognosis for attaining seizure remission.[aafp.org]

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