Kleefstra Syndrome 1; Klefs1

Description

Submicroscopic subtelomeric deletions of chromosome 9q are associated with a recognizable mental retardation syndrome (Harada et al., 2004; Iwakoshi et al., 2004; Stewart et al., 2004; Neas et al., 2005). Common features in patients with 9q subtelomeric deletion syndrome are severe mental retardation, hypotonia, brachy(micro)cephaly, epileptic seizures, flat face with hypertelorism, synophrys, anteverted nares, everted lower lip, carp mouth with macroglossia, and heart defects. Genetic Heterogeneity of Kleefstra SyndromeKLEFS2 (OMIM ) is caused by mutation in the KMT2C gene (OMIM ) on chromosome 7q36.

Clinical Features

Top most frequent phenotypes and symptoms related to Kleefstra Syndrome 1; Klefs1

  • Intellectual disability
  • Seizures
  • Global developmental delay
  • Short stature
  • Generalized hypotonia
  • Hearing impairment
  • Microcephaly
  • Scoliosis
  • Hypertelorism
  • Muscular hypotonia

And another 83 symptoms. If you need more information about this disease we can help you.

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Incidence and onset information

— Currently we don't have prevalence information about this disease (Not enough data available about incidence and published cases.)
— The onset for some of the known clinical features related to this disease may vary, including congenital onset, juvenile onset, juvenile onset, and childhood onset .

Alternative names

Kleefstra Syndrome 1; Klefs1 Is also known as chromosome 9q34.3 deletion syndrome, 9q subtelomeric deletion syndrome, 9q- syndrome.

Researches and researchers

Currently, we don't have any information about doctors, researches or researchers related to this disease. Please contact us if you would like to appear here.


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Kleefstra Syndrome 1; Klefs1 Recommended genes panels

Panel Name, Specifity and genes Tested/covered
Syndromic Autism Panel.

By Greenwood Genetic Center Diagnostic Laboratories Greenwood Genetic Center (United States).

SCN1A, SCN2A, BRAF, SLC2A1, SLC9A6, SMC1A, KDM5C, CDKL5, STXBP1, TBR1, TCF4, MED12, TSC1, TSC2, UBE3A, HDAC8, CNTNAP2, FOXP2, CACNA1C, NSD1 , (...)

View the complete list with 63 more genes
Specificity
2 %
Genes
100 %
Rett-Angelman Syndrome 2nd-Tier Sequencing Panel.

By Greenwood Genetic Center Diagnostic Laboratories Greenwood Genetic Center (United States).

SLC2A1, SLC9A6, CDKL5, TCF4, UBE3A, CNTNAP2, PCDH19, ZEB2, ARX, MBD5, EHMT1, CTNNB1, FOLR1, FOXG1, MECP2, MEF2C, NRXN1, OPHN1, ATRX, PNKP , (...)

View the complete list with 1 more genes
Specificity
5 %
Genes
100 %
Rett/Angelman Syndrome Deletion/Duplication Panel.

By Genetic Services Laboratory University of Chicago (United States).

SLC2A1, SLC9A6, CDKL5, TCF4, UBE3A, CNTNAP2, PCDH19, ZEB2, ARX, MBD5, EHMT1, DYRK1A, FOLR1, FOXG1, MECP2, MEF2C, NRXN1, OPHN1, ATRX, PNKP
Specificity
5 %
Genes
100 %
Non-Specific Intellectual Disability Panel.

By Genetic Services Laboratory University of Chicago (United States).

RPS6KA3, CLIP1, SCN2A, ST3GAL3, SLC16A2, SLC25A1, SLC6A8, SLC9A6, SMARCA4, SMARCB1, ARID1A, SMC1A, KDM5C, SMS, SOX11, CDKL5, STXBP1, SYN1, SYNGAP1, SYP , (...)

View the complete list with 153 more genes
Specificity
1 %
Genes
100 %
Rett/Angelman Syndrome Sequencing Panel.

By Genetic Services Laboratory University of Chicago (United States).

SLC2A1, SLC9A6, CDKL5, TCF4, UBE3A, CNTNAP2, PCDH19, ZEB2, ARX, MBD5, EHMT1, WDR45, ADSL, TRAPPC9, DYRK1A, FOLR1, FOXG1, MECP2, MEF2C, NRXN1 , (...)

View the complete list with 3 more genes
Specificity
5 %
Genes
100 %
Rett/Atypical Rett/Angelman.

By Human Genetics Laboratory, Munroe-Meyer Institute University of Nebraska Medical Center (United States).

SLC9A6, CDKL5, TCF4, UBE3A, CNTNAP2, PCDH19, ZEB2, ARX, MBD5, EHMT1, FOXG1, MECP2, MEF2C, NRXN1, ATRX, PNKP
Specificity
7 %
Genes
100 %
Autism/Intellectual Disability/Multiple Anomalies.

By Human Genetics Laboratory, Munroe-Meyer Institute University of Nebraska Medical Center (United States).

BDNF, RPS6KA3, SCN1A, BRAF, SLC2A1, SLC6A4, SLC9A6, SMC1A, KDM5C, SOS1, CDKL5, TCF4, MED12, TSC1, TSC2, UBE3A, HDAC8, CNTNAP2, FOXP2, CACNA1C , (...)

View the complete list with 69 more genes
Specificity
2 %
Genes
100 %
CustomNext: Neuro.

By Ambry Genetics (United States).

RPL10, RPS6KA3, SCN1A, SCN1B, SCN2A, SCN8A, ST3GAL3, SLC16A2, SLC2A1, SLC35A2, SLC6A1, SLC6A8, SLC9A6, SMARCA2, SMARCA4, SMARCB1, SMC1A, KDM5C, SMS, SNAP25 , (...)

View the complete list with 176 more genes
Specificity
1 %
Genes
100 %

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Sources and references

You can check the following sources for additional information.

ORPHANET OMIM Genetic Syndrome Finder

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