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Seizures, benign familial infantile, 2(BFIS2)

MedGen UID:
381313
•Concept ID:
C1853995
•
Disease or Syndrome
Synonyms: BFIS2; CONVULSIONS, BENIGN FAMILIAL INFANTILE, 2
 
Gene (location): PRRT2 (16p11.2)
 
Monarch Initiative: MONDO:0011593
OMIM®: 605751

Disease characteristics

Excerpted from the GeneReview: PRRT2-Related Disorder
PRRT2-related disorder, caused by heterozygous pathogenic variants in the gene PRRT2 (associated with aberrant synaptic transmission), is characterized by three core episodic neurologic phenotypes: epilepsy, movement disorder, and migraine. Age at onset and phenotypes range from neonatal/infantile (self-limited [familial] infantile epilepsy), to childhood (childhood absence epilepsy), to adolescence to adulthood (paroxysmal kinesigenic dyskinesia [PKD] or migraine). As individuals with PRRT2-related disorder age, they may exhibit one of more of these core phenotypes in various combinations, either concurrently or sequentially. Additionally, family members with the same pathogenic PRRT2 variant may display different core phenotypes. [from GeneReviews]
Full text of GeneReview (by section):
Summary  |  Diagnosis  |  Clinical Characteristics  |  Genetically Related (Allelic) Disorders  |  Differential Diagnosis  |  Management  |  Genetic Counseling  |  Resources  |  Molecular Genetics  |  Chapter Notes  |  References
Authors:
Kathryn Yang  |  Vincente Quiroz  |  Darius Ebrahimi-Fakhari   view full author information

Additional description

From OMIM
Benign familial infantile seizure is an autosomal dominant disorder characterized by afebrile partial complex or generalized tonic-clonic seizures occurring between 3 and 12 months of age with a good response to medication and no neurologic sequelae. Seizures usually remit by age 18 months (summary by Weber et al., 2004). For a general phenotypic description and a discussion of genetic heterogeneity of benign familial infantile seizures, see BFIS1 (601764). Benign familial infantile seizures can also occur in 2 allelic disorders: infantile convulsions and choreoathetosis (ICCA; 602066) and paroxysmal kinesigenic choreoathetosis (EKD1; 128200).  http://www.omim.org/entry/605751

Clinical features

From HPO
Febrile seizure (within the age range of 3 months to 6 years)
MedGen UID:
3232
•Concept ID:
C0009952
•
Disease or Syndrome
A febrile seizure is any type of seizure (most often a generalized tonic-clonic seizure) occurring with fever (at least 38 degrees Celsius) but in the absence of central nervous system infection, severe metabolic disturbance or other alternative precipitant in children between the ages of 3 months and 6 years.
See: Feature record | Search on this feature
Migraine
MedGen UID:
57451
•Concept ID:
C0149931
•
Disease or Syndrome
Migraine is a chronic neurological disorder characterized by episodic attacks of headache and associated symptoms.
See: Feature record | Search on this feature
Focal impaired awareness seizure
MedGen UID:
543022
•Concept ID:
C0270834
•
Disease or Syndrome
Focal impaired awareness seizure (or focal seizure with impaired or lost awareness) is a type of focal-onset seizure characterized by some degree (which may be partial) of impairment of the person's awareness of themselves or their surroundings at any point during the seizure.
See: Feature record | Search on this feature
Bilateral tonic-clonic seizure
MedGen UID:
141670
•Concept ID:
C0494475
•
Sign or Symptom
A bilateral tonic-clonic seizure is a seizure defined by a tonic (bilateral increased tone, lasting seconds to minutes) and then a clonic (bilateral sustained rhythmic jerking) phase.
See: Feature record | Search on this feature
Neurodevelopmental abnormality
MedGen UID:
868343
•Concept ID:
C4022737
•
Pathologic Function
A deviation from normal of the neurological development of a child, which may include any or all of the aspects of the development of personal, social, gross or fine motor, and cognitive abilities.
See: Feature record | Search on this feature

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  

Professional guidelines

PubMed

International consensus on diagnosis and management of Dravet syndrome.
Wirrell EC, Hood V, Knupp KG, Meskis MA, Nabbout R, Scheffer IE, Wilmshurst J, Sullivan J
Epilepsia 2022 Jul;63(7):1761-1777. Epub 2022 May 12 doi: 10.1111/epi.17274. PMID: 35490361Free PMC Article
Genotype-phenotype correlations in SCN8A-related disorders reveal prognostic and therapeutic implications.
Johannesen KM, Liu Y, Koko M, Gjerulfsen CE, Sonnenberg L, Schubert J, Fenger CD, Eltokhi A, Rannap M, Koch NA, Lauxmann S, Krüger J, Kegele J, Canafoglia L, Franceschetti S, Mayer T, Rebstock J, Zacher P, Ruf S, Alber M, Sterbova K, Lassuthová P, Vlckova M, Lemke JR, Platzer K, Krey I, Heine C, Wieczorek D, Kroell-Seger J, Lund C, Klein KM, Au PYB, Rho JM, Ho AW, Masnada S, Veggiotti P, Giordano L, Accorsi P, Hoei-Hansen CE, Striano P, Zara F, Verhelst H, Verhoeven JS, Braakman HMH, van der Zwaag B, Harder AVE, Brilstra E, Pendziwiat M, Lebon S, Vaccarezza M, Le NM, Christensen J, Grønborg S, Scherer SW, Howe J, Fazeli W, Howell KB, Leventer R, Stutterd C, Walsh S, Gerard M, Gerard B, Matricardi S, Bonardi CM, Sartori S, Berger A, Hoffman-Zacharska D, Mastrangelo M, Darra F, Vøllo A, Motazacker MM, Lakeman P, Nizon M, Betzler C, Altuzarra C, Caume R, Roubertie A, Gélisse P, Marini C, Guerrini R, Bilan F, Tibussek D, Koch-Hogrebe M, Perry MS, Ichikawa S, Dadali E, Sharkov A, Mishina I, Abramov M, Kanivets I, Korostelev S, Kutsev S, Wain KE, Eisenhauer N, Wagner M, Savatt JM, Müller-Schlüter K, Bassan H, Borovikov A, Nassogne MC, Destrée A, Schoonjans AS, Meuwissen M, Buzatu M, Jansen A, Scalais E, Srivastava S, Tan WH, Olson HE, Loddenkemper T, Poduri A, Helbig KL, Helbig I, Fitzgerald MP, Goldberg EM, Roser T, Borggraefe I, Brünger T, May P, Lal D, Lederer D, Rubboli G, Heyne HO, Lesca G, Hedrich UBS, Benda J, Gardella E, Lerche H, Møller RS
Brain 2022 Sep 14;145(9):2991-3009. doi: 10.1093/brain/awab321. PMID: 34431999Free PMC Article
Guidelines on the diagnosis, clinical assessments, treatment and management for CLN2 disease patients.
Mole SE, Schulz A, Badoe E, Berkovic SF, de Los Reyes EC, Dulz S, Gissen P, Guelbert N, Lourenco CM, Mason HL, Mink JW, Murphy N, Nickel M, Olaya JE, Scarpa M, Scheffer IE, Simonati A, Specchio N, Von Löbbecke I, Wang RY, Williams RE
Orphanet J Rare Dis 2021 Apr 21;16(1):185. doi: 10.1186/s13023-021-01813-5. PMID: 33882967Free PMC Article

Recent clinical studies

Etiology

Epidemiology of Developmental and Epileptic Encephalopathy and of Intellectual Disability and Epilepsy in Children.
Poke G, Stanley J, Scheffer IE, Sadleir LG
Neurology 2023 Mar 28;100(13):e1363-e1375. Epub 2022 Dec 29 doi: 10.1212/WNL.0000000000206758. PMID: 36581463Free PMC Article
Efficacy and Safety of Fenfluramine for the Treatment of Seizures Associated With Lennox-Gastaut Syndrome: A Randomized Clinical Trial.
Knupp KG, Scheffer IE, Ceulemans B, Sullivan JE, Nickels KC, Lagae L, Guerrini R, Zuberi SM, Nabbout R, Riney K, Shore S, Agarwal A, Lock M, Farfel GM, Galer BS, Gammaitoni AR, Davis R, Gil-Nagel A
JAMA Neurol 2022 Jun 1;79(6):554-564. doi: 10.1001/jamaneurol.2022.0829. PMID: 35499850Free PMC Article
International consensus on diagnosis and management of Dravet syndrome.
Wirrell EC, Hood V, Knupp KG, Meskis MA, Nabbout R, Scheffer IE, Wilmshurst J, Sullivan J
Epilepsia 2022 Jul;63(7):1761-1777. Epub 2022 May 12 doi: 10.1111/epi.17274. PMID: 35490361Free PMC Article
Genotype-phenotype correlations in SCN8A-related disorders reveal prognostic and therapeutic implications.
Johannesen KM, Liu Y, Koko M, Gjerulfsen CE, Sonnenberg L, Schubert J, Fenger CD, Eltokhi A, Rannap M, Koch NA, Lauxmann S, Krüger J, Kegele J, Canafoglia L, Franceschetti S, Mayer T, Rebstock J, Zacher P, Ruf S, Alber M, Sterbova K, Lassuthová P, Vlckova M, Lemke JR, Platzer K, Krey I, Heine C, Wieczorek D, Kroell-Seger J, Lund C, Klein KM, Au PYB, Rho JM, Ho AW, Masnada S, Veggiotti P, Giordano L, Accorsi P, Hoei-Hansen CE, Striano P, Zara F, Verhelst H, Verhoeven JS, Braakman HMH, van der Zwaag B, Harder AVE, Brilstra E, Pendziwiat M, Lebon S, Vaccarezza M, Le NM, Christensen J, Grønborg S, Scherer SW, Howe J, Fazeli W, Howell KB, Leventer R, Stutterd C, Walsh S, Gerard M, Gerard B, Matricardi S, Bonardi CM, Sartori S, Berger A, Hoffman-Zacharska D, Mastrangelo M, Darra F, Vøllo A, Motazacker MM, Lakeman P, Nizon M, Betzler C, Altuzarra C, Caume R, Roubertie A, Gélisse P, Marini C, Guerrini R, Bilan F, Tibussek D, Koch-Hogrebe M, Perry MS, Ichikawa S, Dadali E, Sharkov A, Mishina I, Abramov M, Kanivets I, Korostelev S, Kutsev S, Wain KE, Eisenhauer N, Wagner M, Savatt JM, Müller-Schlüter K, Bassan H, Borovikov A, Nassogne MC, Destrée A, Schoonjans AS, Meuwissen M, Buzatu M, Jansen A, Scalais E, Srivastava S, Tan WH, Olson HE, Loddenkemper T, Poduri A, Helbig KL, Helbig I, Fitzgerald MP, Goldberg EM, Roser T, Borggraefe I, Brünger T, May P, Lal D, Lederer D, Rubboli G, Heyne HO, Lesca G, Hedrich UBS, Benda J, Gardella E, Lerche H, Møller RS
Brain 2022 Sep 14;145(9):2991-3009. doi: 10.1093/brain/awab321. PMID: 34431999Free PMC Article
The phenotypic spectrum of SCN2A-related epilepsy.
Reynolds C, King MD, Gorman KM
Eur J Paediatr Neurol 2020 Jan;24:117-122. Epub 2019 Dec 12 doi: 10.1016/j.ejpn.2019.12.016. PMID: 31924505

Diagnosis

Movement Disorders in Patients With Genetic Developmental and Epileptic Encephalopathies.
van der Veen S, Tse GTW, Ferretti A, Garone G, Post B, Specchio N, Fung VSC, Trivisano M, Scheffer IE
Neurology 2023 Nov 7;101(19):e1884-e1892. Epub 2023 Sep 25 doi: 10.1212/WNL.0000000000207808. PMID: 37748886Free PMC Article
Rates of Status Epilepticus and Sudden Unexplained Death in Epilepsy in People With Genetic Developmental and Epileptic Encephalopathies.
Donnan AM, Schneider AL, Russ-Hall S, Churilov L, Scheffer IE
Neurology 2023 Apr 18;100(16):e1712-e1722. Epub 2023 Feb 7 doi: 10.1212/WNL.0000000000207080. PMID: 36750385Free PMC Article
Epidemiology of Developmental and Epileptic Encephalopathy and of Intellectual Disability and Epilepsy in Children.
Poke G, Stanley J, Scheffer IE, Sadleir LG
Neurology 2023 Mar 28;100(13):e1363-e1375. Epub 2022 Dec 29 doi: 10.1212/WNL.0000000000206758. PMID: 36581463Free PMC Article
Efficacy and Safety of Fenfluramine for the Treatment of Seizures Associated With Lennox-Gastaut Syndrome: A Randomized Clinical Trial.
Knupp KG, Scheffer IE, Ceulemans B, Sullivan JE, Nickels KC, Lagae L, Guerrini R, Zuberi SM, Nabbout R, Riney K, Shore S, Agarwal A, Lock M, Farfel GM, Galer BS, Gammaitoni AR, Davis R, Gil-Nagel A
JAMA Neurol 2022 Jun 1;79(6):554-564. doi: 10.1001/jamaneurol.2022.0829. PMID: 35499850Free PMC Article
International consensus on diagnosis and management of Dravet syndrome.
Wirrell EC, Hood V, Knupp KG, Meskis MA, Nabbout R, Scheffer IE, Wilmshurst J, Sullivan J
Epilepsia 2022 Jul;63(7):1761-1777. Epub 2022 May 12 doi: 10.1111/epi.17274. PMID: 35490361Free PMC Article

Therapy

An Italian consensus on the management of Lennox-Gastaut syndrome.
Riva A, Coppola A, Bonaventura CD, Elia M, Ferlazzo E, Gobbi G, Marini C, Meletti S, Romeo A, Santoro K, Verrotti A, Capovilla G, Striano P; Italian LGS Delphi Group
Seizure 2022 Oct;101:134-140. Epub 2022 Jul 15 doi: 10.1016/j.seizure.2022.07.004. PMID: 35981474
Efficacy and Safety of Fenfluramine for the Treatment of Seizures Associated With Lennox-Gastaut Syndrome: A Randomized Clinical Trial.
Knupp KG, Scheffer IE, Ceulemans B, Sullivan JE, Nickels KC, Lagae L, Guerrini R, Zuberi SM, Nabbout R, Riney K, Shore S, Agarwal A, Lock M, Farfel GM, Galer BS, Gammaitoni AR, Davis R, Gil-Nagel A
JAMA Neurol 2022 Jun 1;79(6):554-564. doi: 10.1001/jamaneurol.2022.0829. PMID: 35499850Free PMC Article
Genotype-phenotype correlations in SCN8A-related disorders reveal prognostic and therapeutic implications.
Johannesen KM, Liu Y, Koko M, Gjerulfsen CE, Sonnenberg L, Schubert J, Fenger CD, Eltokhi A, Rannap M, Koch NA, Lauxmann S, Krüger J, Kegele J, Canafoglia L, Franceschetti S, Mayer T, Rebstock J, Zacher P, Ruf S, Alber M, Sterbova K, Lassuthová P, Vlckova M, Lemke JR, Platzer K, Krey I, Heine C, Wieczorek D, Kroell-Seger J, Lund C, Klein KM, Au PYB, Rho JM, Ho AW, Masnada S, Veggiotti P, Giordano L, Accorsi P, Hoei-Hansen CE, Striano P, Zara F, Verhelst H, Verhoeven JS, Braakman HMH, van der Zwaag B, Harder AVE, Brilstra E, Pendziwiat M, Lebon S, Vaccarezza M, Le NM, Christensen J, Grønborg S, Scherer SW, Howe J, Fazeli W, Howell KB, Leventer R, Stutterd C, Walsh S, Gerard M, Gerard B, Matricardi S, Bonardi CM, Sartori S, Berger A, Hoffman-Zacharska D, Mastrangelo M, Darra F, Vøllo A, Motazacker MM, Lakeman P, Nizon M, Betzler C, Altuzarra C, Caume R, Roubertie A, Gélisse P, Marini C, Guerrini R, Bilan F, Tibussek D, Koch-Hogrebe M, Perry MS, Ichikawa S, Dadali E, Sharkov A, Mishina I, Abramov M, Kanivets I, Korostelev S, Kutsev S, Wain KE, Eisenhauer N, Wagner M, Savatt JM, Müller-Schlüter K, Bassan H, Borovikov A, Nassogne MC, Destrée A, Schoonjans AS, Meuwissen M, Buzatu M, Jansen A, Scalais E, Srivastava S, Tan WH, Olson HE, Loddenkemper T, Poduri A, Helbig KL, Helbig I, Fitzgerald MP, Goldberg EM, Roser T, Borggraefe I, Brünger T, May P, Lal D, Lederer D, Rubboli G, Heyne HO, Lesca G, Hedrich UBS, Benda J, Gardella E, Lerche H, Møller RS
Brain 2022 Sep 14;145(9):2991-3009. doi: 10.1093/brain/awab321. PMID: 34431999Free PMC Article
Siblings with refractory occipital epilepsy showing localized network activity on EEG-fMRI.
Carney PW, Harvey AS, Berkovic SF, Jackson GD, Scheffer IE
Epilepsia 2013 Feb;54(2):e28-32. Epub 2013 Jan 7 doi: 10.1111/epi.12076. PMID: 23294395
Benign infantile seizures: a prospective study.
Espeche A
Epilepsy Res 2010 Mar;89(1):96-103. Epub 2009 Nov 30 doi: 10.1016/j.eplepsyres.2009.10.017. PMID: 19945823

Prognosis

An Italian consensus on the management of Lennox-Gastaut syndrome.
Riva A, Coppola A, Bonaventura CD, Elia M, Ferlazzo E, Gobbi G, Marini C, Meletti S, Romeo A, Santoro K, Verrotti A, Capovilla G, Striano P; Italian LGS Delphi Group
Seizure 2022 Oct;101:134-140. Epub 2022 Jul 15 doi: 10.1016/j.seizure.2022.07.004. PMID: 35981474
Genotype-phenotype correlations in SCN8A-related disorders reveal prognostic and therapeutic implications.
Johannesen KM, Liu Y, Koko M, Gjerulfsen CE, Sonnenberg L, Schubert J, Fenger CD, Eltokhi A, Rannap M, Koch NA, Lauxmann S, Krüger J, Kegele J, Canafoglia L, Franceschetti S, Mayer T, Rebstock J, Zacher P, Ruf S, Alber M, Sterbova K, Lassuthová P, Vlckova M, Lemke JR, Platzer K, Krey I, Heine C, Wieczorek D, Kroell-Seger J, Lund C, Klein KM, Au PYB, Rho JM, Ho AW, Masnada S, Veggiotti P, Giordano L, Accorsi P, Hoei-Hansen CE, Striano P, Zara F, Verhelst H, Verhoeven JS, Braakman HMH, van der Zwaag B, Harder AVE, Brilstra E, Pendziwiat M, Lebon S, Vaccarezza M, Le NM, Christensen J, Grønborg S, Scherer SW, Howe J, Fazeli W, Howell KB, Leventer R, Stutterd C, Walsh S, Gerard M, Gerard B, Matricardi S, Bonardi CM, Sartori S, Berger A, Hoffman-Zacharska D, Mastrangelo M, Darra F, Vøllo A, Motazacker MM, Lakeman P, Nizon M, Betzler C, Altuzarra C, Caume R, Roubertie A, Gélisse P, Marini C, Guerrini R, Bilan F, Tibussek D, Koch-Hogrebe M, Perry MS, Ichikawa S, Dadali E, Sharkov A, Mishina I, Abramov M, Kanivets I, Korostelev S, Kutsev S, Wain KE, Eisenhauer N, Wagner M, Savatt JM, Müller-Schlüter K, Bassan H, Borovikov A, Nassogne MC, Destrée A, Schoonjans AS, Meuwissen M, Buzatu M, Jansen A, Scalais E, Srivastava S, Tan WH, Olson HE, Loddenkemper T, Poduri A, Helbig KL, Helbig I, Fitzgerald MP, Goldberg EM, Roser T, Borggraefe I, Brünger T, May P, Lal D, Lederer D, Rubboli G, Heyne HO, Lesca G, Hedrich UBS, Benda J, Gardella E, Lerche H, Møller RS
Brain 2022 Sep 14;145(9):2991-3009. doi: 10.1093/brain/awab321. PMID: 34431999Free PMC Article
The phenotypic spectrum of SCN2A-related epilepsy.
Reynolds C, King MD, Gorman KM
Eur J Paediatr Neurol 2020 Jan;24:117-122. Epub 2019 Dec 12 doi: 10.1016/j.ejpn.2019.12.016. PMID: 31924505
The spectrum of benign infantile seizures.
Specchio N, Vigevano F
Epilepsy Res 2006 Aug;70 Suppl 1:S156-67. Epub 2006 Jul 11 doi: 10.1016/j.eplepsyres.2006.01.018. PMID: 16837167
Neonate with benign familial neonatal convulsions: recorded generalized and focal seizures.
Bye AM
Pediatr Neurol 1994 Mar;10(2):164-5. doi: 10.1016/0887-8994(94)90052-3. PMID: 8024668

Clinical prediction guides

Movement Disorders in Patients With Genetic Developmental and Epileptic Encephalopathies.
van der Veen S, Tse GTW, Ferretti A, Garone G, Post B, Specchio N, Fung VSC, Trivisano M, Scheffer IE
Neurology 2023 Nov 7;101(19):e1884-e1892. Epub 2023 Sep 25 doi: 10.1212/WNL.0000000000207808. PMID: 37748886Free PMC Article
Rates of Status Epilepticus and Sudden Unexplained Death in Epilepsy in People With Genetic Developmental and Epileptic Encephalopathies.
Donnan AM, Schneider AL, Russ-Hall S, Churilov L, Scheffer IE
Neurology 2023 Apr 18;100(16):e1712-e1722. Epub 2023 Feb 7 doi: 10.1212/WNL.0000000000207080. PMID: 36750385Free PMC Article
An Italian consensus on the management of Lennox-Gastaut syndrome.
Riva A, Coppola A, Bonaventura CD, Elia M, Ferlazzo E, Gobbi G, Marini C, Meletti S, Romeo A, Santoro K, Verrotti A, Capovilla G, Striano P; Italian LGS Delphi Group
Seizure 2022 Oct;101:134-140. Epub 2022 Jul 15 doi: 10.1016/j.seizure.2022.07.004. PMID: 35981474
Efficacy and Safety of Fenfluramine for the Treatment of Seizures Associated With Lennox-Gastaut Syndrome: A Randomized Clinical Trial.
Knupp KG, Scheffer IE, Ceulemans B, Sullivan JE, Nickels KC, Lagae L, Guerrini R, Zuberi SM, Nabbout R, Riney K, Shore S, Agarwal A, Lock M, Farfel GM, Galer BS, Gammaitoni AR, Davis R, Gil-Nagel A
JAMA Neurol 2022 Jun 1;79(6):554-564. doi: 10.1001/jamaneurol.2022.0829. PMID: 35499850Free PMC Article
The phenotypic spectrum of SCN2A-related epilepsy.
Reynolds C, King MD, Gorman KM
Eur J Paediatr Neurol 2020 Jan;24:117-122. Epub 2019 Dec 12 doi: 10.1016/j.ejpn.2019.12.016. PMID: 31924505

Recent systematic reviews

Guidelines on the diagnosis, clinical assessments, treatment and management for CLN2 disease patients.
Mole SE, Schulz A, Badoe E, Berkovic SF, de Los Reyes EC, Dulz S, Gissen P, Guelbert N, Lourenco CM, Mason HL, Mink JW, Murphy N, Nickel M, Olaya JE, Scarpa M, Scheffer IE, Simonati A, Specchio N, Von Löbbecke I, Wang RY, Williams RE
Orphanet J Rare Dis 2021 Apr 21;16(1):185. doi: 10.1186/s13023-021-01813-5. PMID: 33882967Free PMC Article

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