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Joubert syndrome 20(JBTS20)

MedGen UID:
767149
Concept ID:
C3554235
Disease or Syndrome
Synonyms: JBTS20; TMEM231-Related Joubert Syndrome
 
Gene (location): TMEM231 (16q23.1)
 
Monarch Initiative: MONDO:0013994
OMIM®: 614970

Disease characteristics

Excerpted from the GeneReview: Joubert Syndrome
Classic Joubert syndrome (JS) is characterized by three primary findings: A distinctive cerebellar and brain stem malformation called the molar tooth sign (MTS). Hypotonia. Developmental delays. Often these findings are accompanied by episodic tachypnea or apnea and/or atypical eye movements. In general, the breathing abnormalities improve with age, truncal ataxia develops over time, and acquisition of gross motor milestones is delayed. Cognitive abilities are variable, ranging from severe intellectual disability to normal. Additional findings can include retinal dystrophy, renal disease, ocular colobomas, occipital encephalocele, hepatic fibrosis, polydactyly, oral hamartomas, and endocrine abnormalities. Both intra- and interfamilial variation are seen. [from GeneReviews]
Authors:
Melissa Parisi  |  Ian Glass   view full author information

Clinical features

From HPO
Renal cyst
MedGen UID:
854361
Concept ID:
C3887499
Disease or Syndrome
A fluid filled sac in the kidney.
Postaxial polydactyly
MedGen UID:
67394
Concept ID:
C0220697
Disease or Syndrome
Polydactyly refers to the occurrence of supernumerary digits and is the most frequent of congenital hand and foot deformities. Based on the location of the extra digits, polydactyly can be classified into preaxial, involving the thumb or great toe; postaxial, affecting the fifth digit; and central, involving the 3 central digits. Postaxial polydactyly (PAP) is further subclassified into 2 types: in type A, a well-formed extra digit articulates with the fifth or a sixth metacarpal, whereas in type B, a rudimentary, poorly developed extra digit is present (summary by Umm-e-Kalsoom et al., 2012). Genetic Heterogeneity of Postaxial Polydactyly Other forms of postaxial polydactyly type A include PAPA2 (602085) on chromosome 13q21; PAPA3 (607324) on chromosome 19p13; PAPA4 (608562) on chromosome 7q22; PAPA5 (263450) on chromosome 13q13; PAPA6 (615226), caused by mutation in the ZNF141 gene (194648) on chromosome 4p16; PAPA7 (617642), caused by mutation in the IQCE gene (617631) on chromosome 7p22; PAPA8 (618123), caused by mutation in the GLI1 gene (165220) on chromosome 12q13; PAPA9 (618219), caused by mutation in the FAM98A gene (617273) on chromosome 8q22; and PAPA10 (618498), caused by mutation in the KIAA0825 gene (617266) on chromosome 5q15.
4-5 toe syndactyly
MedGen UID:
324891
Concept ID:
C1837836
Finding
Syndactyly with fusion of toes four and five.
Aggressive behavior
MedGen UID:
1375
Concept ID:
C0001807
Individual Behavior
Behavior or an act aimed at harming a person, animal, or physical property (e.g., acts of physical violence; shouting, swearing, and using harsh language; slashing someone's tires).
Self-mutilation
MedGen UID:
19925
Concept ID:
C0036601
Injury or Poisoning
Deliberate harm to one's body resulting in tissue damage, without a conscious intent to die.
Global developmental delay
MedGen UID:
107838
Concept ID:
C0557874
Finding
A delay in the achievement of motor or mental milestones in the domains of development of a child, including motor skills, speech and language, cognitive skills, and social and emotional skills. This term should only be used to describe children younger than five years of age.
Inability to walk
MedGen UID:
107860
Concept ID:
C0560046
Finding
Incapability to ambulate.
Absent speech
MedGen UID:
340737
Concept ID:
C1854882
Finding
Complete lack of development of speech and language abilities.
Molar tooth sign on MRI
MedGen UID:
400670
Concept ID:
C1865060
Finding
An abnormal appearance of the midbrain in axial magnetic resonance imaging in which the elongated superior cerebellar peduncles give the midbrain an appearance reminiscent of a molar or wisdom tooth.
Oculomotor apraxia
MedGen UID:
483686
Concept ID:
C3489733
Disease or Syndrome
Ocular motor apraxia is a deficiency in voluntary, horizontal, lateral, fast eye movements (saccades) with retention of slow pursuit movements. The inability to follow objects visually is often compensated by head movements. There may be decreased smooth pursuit, and cancelation of the vestibulo-ocular reflex.
Respiratory insufficiency
MedGen UID:
11197
Concept ID:
C0035229
Pathologic Function
Impairment of gas exchange within the lungs secondary to a disease process, neoplasm, or trauma, possibly resulting in hypoxia, hypercarbia, or both, but not requiring intubation or mechanical ventilation. Patients are normally managed with pharmaceutical therapy, supplemental oxygen, or both.
Retinopathy
MedGen UID:
11209
Concept ID:
C0035309
Disease or Syndrome
Any noninflammatory disease of the retina. This nonspecific term is retained here because of its wide use in the literature, but if possible new annotations should indicate the precise type of retinal abnormality.

Professional guidelines

PubMed

Tang X, Liu C, Liu X, Chen J, Fan X, Liu J, Ma D, Cao G, Chen Z, Xu D, Zhu Y, Jiang X, Cheng L, Wu Y, Hou L, Li Y, Shao X, Zheng S, Zhang A, Zheng B, Jian S, Rong Z, Su Q, Gao X, Rao J, Shen Q, Xu H; Chinese Children Genetic Kidney Disease Database (CCGKDD); “Internet Plus” Nephrology Alliance of the National Center for Children’s Care
J Med Genet 2022 Feb;59(2):147-154. Epub 2020 Dec 15 doi: 10.1136/jmedgenet-2020-107184. PMID: 33323469
Brooks BP, Zein WM, Thompson AH, Mokhtarzadeh M, Doherty DA, Parisi M, Glass IA, Malicdan MC, Vilboux T, Vemulapalli M, Mullikin JC, Gahl WA, Gunay-Aygun M
Ophthalmology 2018 Dec;125(12):1937-1952. Epub 2018 Jul 25 doi: 10.1016/j.ophtha.2018.05.026. PMID: 30055837Free PMC Article
Bachmann-Gagescu R, Ishak GE, Dempsey JC, Adkins J, O'Day D, Phelps IG, Gunay-Aygun M, Kline AD, Szczaluba K, Martorell L, Alswaid A, Alrasheed S, Pai S, Izatt L, Ronan A, Parisi MA, Mefford H, Glass I, Doherty D
J Med Genet 2012 Feb;49(2):126-37. doi: 10.1136/jmedgenet-2011-100552. PMID: 22241855

Recent clinical studies

Etiology

Chang MY, Grosrenaud P, Borchert MS
J Pediatr Ophthalmol Strabismus 2022 Sep-Oct;59(5):326-331. Epub 2022 Feb 22 doi: 10.3928/01913913-20220106-01. PMID: 35192381Free PMC Article
Tang X, Liu C, Liu X, Chen J, Fan X, Liu J, Ma D, Cao G, Chen Z, Xu D, Zhu Y, Jiang X, Cheng L, Wu Y, Hou L, Li Y, Shao X, Zheng S, Zhang A, Zheng B, Jian S, Rong Z, Su Q, Gao X, Rao J, Shen Q, Xu H; Chinese Children Genetic Kidney Disease Database (CCGKDD); “Internet Plus” Nephrology Alliance of the National Center for Children’s Care
J Med Genet 2022 Feb;59(2):147-154. Epub 2020 Dec 15 doi: 10.1136/jmedgenet-2020-107184. PMID: 33323469
Nuovo S, Bacigalupo I, Ginevrino M, Battini R, Bertini E, Borgatti R, Casella A, Micalizzi A, Nardella M, Romaniello R, Serpieri V, Zanni G, Valente EM, Vanacore N; JS Italian Study Group
Neurology 2020 Feb 25;94(8):e797-e801. Epub 2020 Jan 22 doi: 10.1212/WNL.0000000000008996. PMID: 31969461Free PMC Article
Brancati F, Dallapiccola B, Valente EM
Orphanet J Rare Dis 2010 Jul 8;5:20. doi: 10.1186/1750-1172-5-20. PMID: 20615230Free PMC Article
Steinlin M
Brain Dev 1998 Jun;20(4):199-208. doi: 10.1016/s0387-7604(98)00019-9. PMID: 9661964

Diagnosis

Harion M, Qebibo L, Riquet A, Rougeot C, Afenjar A, Garel C, Louha M, Lacaze E, Audic-Gérard F, Barth M, Berquin P, Bonneau D, Bourdain F, Busa T, Colin E, Cuisset JM, Des Portes V, Dorison N, Francannet C, Héron B, Laroche C, Lebrun M, Métreau J, Odent S, Pasquier L, Trujillo YP, Perrin L, Pinson L, Rivier F, Sigaudy S, Thauvin-Robinet C, Louvier UW, Labayle O, Rodriguez D, Valence S, Burglen L
J Med Genet 2023 Jun;60(6):578-586. Epub 2022 Nov 1 doi: 10.1136/jmg-2022-108754. PMID: 36319078
Nuovo S, Bacigalupo I, Ginevrino M, Battini R, Bertini E, Borgatti R, Casella A, Micalizzi A, Nardella M, Romaniello R, Serpieri V, Zanni G, Valente EM, Vanacore N; JS Italian Study Group
Neurology 2020 Feb 25;94(8):e797-e801. Epub 2020 Jan 22 doi: 10.1212/WNL.0000000000008996. PMID: 31969461Free PMC Article
Poretti A, Boltshauser E, Huisman TAGM
Cerebellum 2016 Feb;15(1):5-9. doi: 10.1007/s12311-015-0699-z. PMID: 26166429
Brancati F, Dallapiccola B, Valente EM
Orphanet J Rare Dis 2010 Jul 8;5:20. doi: 10.1186/1750-1172-5-20. PMID: 20615230Free PMC Article
Steinlin M
Brain Dev 1998 Jun;20(4):199-208. doi: 10.1016/s0387-7604(98)00019-9. PMID: 9661964

Therapy

Brooks BP, Zein WM, Thompson AH, Mokhtarzadeh M, Doherty DA, Parisi M, Glass IA, Malicdan MC, Vilboux T, Vemulapalli M, Mullikin JC, Gahl WA, Gunay-Aygun M
Ophthalmology 2018 Dec;125(12):1937-1952. Epub 2018 Jul 25 doi: 10.1016/j.ophtha.2018.05.026. PMID: 30055837Free PMC Article
Lee SH, Nam TS, Li W, Kim JH, Yoon W, Choi YD, Kim KH, Cai H, Kim MJ, Kim C, Choy HE, Kim N, Chay KO, Kim MK, Choi SY
Sci Rep 2017 Aug 31;7(1):10222. doi: 10.1038/s41598-017-10652-z. PMID: 28860541Free PMC Article

Prognosis

Poretti A, Boltshauser E, Huisman TAGM
Cerebellum 2016 Feb;15(1):5-9. doi: 10.1007/s12311-015-0699-z. PMID: 26166429
Kroes HY, Monroe GR, van der Zwaag B, Duran KJ, de Kovel CG, van Roosmalen MJ, Harakalova M, Nijman IJ, Kloosterman WP, Giles RH, Knoers NV, van Haaften G
Eur J Hum Genet 2016 Feb;24(2):214-20. Epub 2015 Apr 29 doi: 10.1038/ejhg.2015.84. PMID: 25920555Free PMC Article
Bachmann-Gagescu R, Ishak GE, Dempsey JC, Adkins J, O'Day D, Phelps IG, Gunay-Aygun M, Kline AD, Szczaluba K, Martorell L, Alswaid A, Alrasheed S, Pai S, Izatt L, Ronan A, Parisi MA, Mefford H, Glass I, Doherty D
J Med Genet 2012 Feb;49(2):126-37. doi: 10.1136/jmedgenet-2011-100552. PMID: 22241855
Brancati F, Dallapiccola B, Valente EM
Orphanet J Rare Dis 2010 Jul 8;5:20. doi: 10.1186/1750-1172-5-20. PMID: 20615230Free PMC Article
Farmer JE, Deidrick KM, Gitten JC, Fennell EB, Maria BL
J Child Neurol 2006 Feb;21(2):163-7. doi: 10.1177/08830738060210020401. PMID: 16566885

Clinical prediction guides

Tang X, Liu C, Liu X, Chen J, Fan X, Liu J, Ma D, Cao G, Chen Z, Xu D, Zhu Y, Jiang X, Cheng L, Wu Y, Hou L, Li Y, Shao X, Zheng S, Zhang A, Zheng B, Jian S, Rong Z, Su Q, Gao X, Rao J, Shen Q, Xu H; Chinese Children Genetic Kidney Disease Database (CCGKDD); “Internet Plus” Nephrology Alliance of the National Center for Children’s Care
J Med Genet 2022 Feb;59(2):147-154. Epub 2020 Dec 15 doi: 10.1136/jmedgenet-2020-107184. PMID: 33323469
Kroes HY, Monroe GR, van der Zwaag B, Duran KJ, de Kovel CG, van Roosmalen MJ, Harakalova M, Nijman IJ, Kloosterman WP, Giles RH, Knoers NV, van Haaften G
Eur J Hum Genet 2016 Feb;24(2):214-20. Epub 2015 Apr 29 doi: 10.1038/ejhg.2015.84. PMID: 25920555Free PMC Article
Soliman NA, Hildebrandt F, Otto EA, Nabhan MM, Allen SJ, Badr AM, Sheba M, Fadda S, Gawdat G, El-Kiky H
Saudi J Kidney Dis Transpl 2012 Sep;23(5):1090-8. doi: 10.4103/1319-2442.100968. PMID: 22982934Free PMC Article
Bachmann-Gagescu R, Ishak GE, Dempsey JC, Adkins J, O'Day D, Phelps IG, Gunay-Aygun M, Kline AD, Szczaluba K, Martorell L, Alswaid A, Alrasheed S, Pai S, Izatt L, Ronan A, Parisi MA, Mefford H, Glass I, Doherty D
J Med Genet 2012 Feb;49(2):126-37. doi: 10.1136/jmedgenet-2011-100552. PMID: 22241855
Kamdar BB, Nandkumar P, Krishnan V, Gamaldo CE, Collop NA
Pediatr Neurol 2011 Dec;45(6):395-9. doi: 10.1016/j.pediatrneurol.2011.09.005. PMID: 22115003

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