Kleefstra syndrome

Kleefstra syndrome (KS) is a genetic disorder characterized by intellectual disability, childhood hypotonia, severe expressive speech delay and a distinctive facial appearance with a spectrum of additional clinical features.



Input patient's signs and symptoms


Narrow down the case reports



Total: 16 (papers)

  


(per page)
Matched Phenotype  Gene  Mutation  MeSH
Rank
(Similarity)
PMID
(PMCID)
1
(48.8%)
30448833
New Insights into Kleefstra Syndrome: Report of Two Novel Cases with Previously Unreported Features and Literature Review.
Ciaccio C, Scuvera G, Tucci A, Gentilin B, Baccarin M, Marchisio P, Avignone S, Milani D.
Cytogenet Genome Res. 2018;156(3):127-133.
Macrocephaly Postaxial polydactyly
EHMT1
Brain Chromosome Deletion Chromosomes, Human, Pair 9 Congenital Heart Defects Craniofacial Abnormalities Facies Genotype Histone-Lysine N-Methyltransferase Homo sapiens Infant Intellectual Disability Macrocephaly Magnetic Resonance Imaging Male Mutation Phenotype Polydactyly Toes
2
(47.5%)
23633410
Ring chromosome 9 in a girl with developmental delay and dysmorphic features: case report and review of the literature.
la Cour Sibbesen E, Jespersgaard C, Alosi D, Bisgaard AM, Tumer Z.
Am J Med Genet A. 2013;161A(6):1447-52.
Trigonocephaly Long philtrum
Chromosome Deletion Chromosomes, Human, Pair 9 Congenital Heart Defects Craniofacial Abnormalities Craniosynostosis Developmental Disabilities Females Fluorescent in Situ Hybridization Homo sapiens Infant, Newborn Intellectual Disability Ring Chromosomes
3
(44.8%)
28057753
(5339767)
A Novel Kleefstra Syndrome-associated Variant That Affects the Conserved TPLX Motif within the Ankyrin Repeat of EHMT1 Leads to Abnormal Protein Folding.
Blackburn PR, Tischer A, Zimmermann MT, Kemppainen JL, Sastry S, Knight Johnson AE, Cousin MA, Boczek NJ, Oliver G, Misra VK, Gavrilova RH, Lomberk G, Auton M, Urrutia R, Klee EW.
J Biol Chem. 2017;292(9):3866-3876.
Brachycephaly Synophrys Protruding tongue
EHMT1
c|SUB|C|2426|T;RS#:587780332 p|SUB|P|809|L;RS#:587780332
Amino Acid Motifs Ankyrin Repeat Autism Spectrum Disorders Child, Preschool Chromosome Deletion Chromosomes, Human, Pair 9 Congenital Heart Defects Craniofacial Abnormalities Females Genomics Histone-Lysine N-Methyltransferase Homo sapiens Intellectual Disability Missense Mutation Molecular Dynamics Simulation Phenotype Spectrometry, Fluorescence
4
(39.8%)
28645799
Genotype-phenotype evaluation of MED13L defects in the light of a novel truncating and a recurrent missense mutation.
Asadollahi R, Zweier M, Gogoll L, Schiffmann R, Sticht H, Steindl K, Rauch A.
Eur J Med Genet. 2017;60(9):451-464.
Bulbous nose Upslanted palpebral fissure Hypotonia
MED13L
p|SUB|D|860|G rs1555239936 rs1555240359 rs1555240361 rs1555240376 rs1555241424 rs1555243099 rs1555244216 rs1555246154 rs1555246952 rs1555247469 rs1555247853 rs1555247936 rs1555248020 rs752751372 rs777986630
Child Chromosome Deletion Chromosomes, Human, Pair 9 Congenital Heart Defects Craniofacial Abnormalities Differential Diagnosis Females Genotype Haploinsufficiency Homo sapiens Intellectual Disability Male Mediator Complex Missense Mutation Phenotype
5
(39.0%)
29228531
Kleefstra Syndrome: The First Case Report From Iran.
Noruzinia M, Ahmadvand M, Bashti O, Salehi Chaleshtori AR.
Acta Med Iran. 2017;55(10):650-654.
Brachycephaly
EHMT1
Child, Preschool Chromosome Deletion Chromosomes, Human, Pair 9 Congenital Heart Defects Craniofacial Abnormalities Females Homo sapiens Intellectual Disability Iran Mutation
6
(26.3%)
26918030
(4766673)
Kleefstra syndrome in Hungarian patients: additional symptoms besides the classic phenotype.
Hadzsiev K, Komlosi K, Czako M, Duga B, Szalai R, Szabo A, Postyeni E, Szabo T, Kosztolanyi G, Melegh B.
Mol Cytogenet. 2016;9:22.
Hypertelorism Short nose
7
(4.0%)
30370152
(6189678)
Hypogonadotropic Hypogonadism and Kleefstra Syndrome due to a Pathogenic Variant in the EHMT1 Gene: An Underrecognized Association.
Torga AP, Hodax J, Mori M, Schwab J, Quintos JB.
Case Rep Endocrinol. 2018;2018:4283267.
Cryptorchidism
EHMT1
7
(4.0%)
28622207
Sleep Disturbance as a Precursor of Severe Regression in Kleefstra Syndrome Suggests a Need for Firm and Rapid Pharmacological Treatment.
Vermeulen K, Staal WG, Janzing JG, van Bokhoven H, Egger JIM, Kleefstra T.
Clin Neuropharmacol. 2017;40(4):185-188.
Intellectual disability
Antipsychotic Agents Chromosome Deletion Chromosomes, Human, Pair 9 Combination Drug Therapy Congenital Heart Defects Craniofacial Abnormalities Drug Administration Schedule Females Homo sapiens Intellectual Disability Severity of Illness Index Sleep Wake Disorders Time Factors Young Adult
7
(4.0%)
27966372
Increased first-trimester nuchal translucency associated with a dicentric chromosome and 9q34.3 microdeletion syndrome.
Huang LY, Yang Y, He P, Li DZ.
J Obstet Gynaecol. 2017;37(3):327-329.
Increased nuchal translucency
EHMT1
Adult Chorionic Villi Sampling Chromosome Deletion Chromosomes, Human, Pair 9 Congenital Heart Defects Craniofacial Abnormalities Females Homo sapiens Intellectual Disability Male Pregnancy Pregnancy Trimester, First
7
(4.0%)
27651234
Targeted next generation sequencing of a panel of autism-related genes identifies an EHMT1 mutation in a Kleefstra syndrome patient with autism and normal intellectual performance.
Bock I, Nemeth K, Pentelenyi K, Balicza P, Balazs A, Molnar MJ, Roman V, Nagy J, Levay G, Kobolak J, Dinnyes A.
Gene. 2016;595(2):131-141.
Autism
DPP6
p|SUB|R|322|C;RS#:374450077 p|SUB|W|1138|X rs145694621 rs886037776
Autistic Disorder Child Chromosome Deletion Chromosomes, Human, Pair 9 Congenital Heart Defects Craniofacial Abnormalities Females Haploinsufficiency High-Throughput Nucleotide Sequencing Histone-Lysine N-Methyltransferase Homo sapiens Intellectual Disability Mutation Nonsense Mediated mRNA Decay
        

Phenotype(s) retrieved from Orphanet

    Total: 67

HPO ID Term Frequency
HP:0000232 Everted lower lip vermilion Very frequent (99-80%)
HP:0000272 Malar flattening Very frequent (99-80%)
HP:0000280 Coarse facial features Very frequent (99-80%)
HP:0000316 Hypertelorism Very frequent (99-80%)
HP:0000463 Anteverted nares Very frequent (99-80%)
HP:0000750 Delayed speech and language development Very frequent (99-80%)
HP:0001252 Muscular hypotonia Very frequent (99-80%)
HP:0001263 Global developmental delay Very frequent (99-80%)
HP:0002263 Exaggerated cupid's bow Very frequent (99-80%)
HP:0003196 Short nose Very frequent (99-80%)
HP:0010804 Tented upper lip vermilion Very frequent (99-80%)
HP:0010864 Intellectual disability, severe Very frequent (99-80%)
HP:0000158 Macroglossia Frequent (79-30%)
HP:0000248 Brachycephaly Frequent (79-30%)
HP:0000252 Microcephaly Frequent (79-30%)
HP:0000303 Mandibular prognathia Frequent (79-30%)
HP:0000337 Broad forehead Frequent (79-30%)
HP:0000365 Hearing impairment Frequent (79-30%)
HP:0000389 Chronic otitis media Frequent (79-30%)
HP:0000391 Thickened helices Frequent (79-30%)
HP:0000582 Upslanted palpebral fissure Frequent (79-30%)
HP:0000664 Synophrys Frequent (79-30%)
HP:0000708 Behavioral abnormality Frequent (79-30%)
HP:0000718 Aggressive behavior Frequent (79-30%)
HP:0000729 Autistic behavior Frequent (79-30%)
HP:0000742 Self-mutilation Frequent (79-30%)
HP:0001513 Obesity Frequent (79-30%)
HP:0001629 Ventricular septal defect Frequent (79-30%)
HP:0001647 Bicuspid aortic valve Frequent (79-30%)
HP:0001680 Coarctation of aorta Frequent (79-30%)
HP:0002019 Constipation Frequent (79-30%)
HP:0002360 Sleep disturbance Frequent (79-30%)
HP:0002553 Highly arched eyebrow Frequent (79-30%)
HP:0011675 Arrhythmia Frequent (79-30%)
HP:0000028 Cryptorchidism Occasional (29-5%)
HP:0000047 Hypospadias Occasional (29-5%)
HP:0000054 Micropenis Occasional (29-5%)
HP:0000076 Vesicoureteral reflux Occasional (29-5%)
HP:0000083 Renal insufficiency Occasional (29-5%)
HP:0000107 Renal cyst Occasional (29-5%)
HP:0000126 Hydronephrosis Occasional (29-5%)
HP:0000324 Facial asymmetry Occasional (29-5%)
HP:0000684 Delayed eruption of teeth Occasional (29-5%)
HP:0000733 Stereotypy Occasional (29-5%)
HP:0001250 Seizures Occasional (29-5%)
HP:0001274 Agenesis of corpus callosum Occasional (29-5%)
HP:0001376 Limitation of joint mobility Occasional (29-5%)
HP:0001636 Tetralogy of Fallot Occasional (29-5%)
HP:0001762 Talipes equinovarus Occasional (29-5%)
HP:0002020 Gastroesophageal reflux Occasional (29-5%)
HP:0002021 Pyloric stenosis Occasional (29-5%)
HP:0002094 Dyspnea Occasional (29-5%)
HP:0002119 Ventriculomegaly Occasional (29-5%)
HP:0002120 Cerebral cortical atrophy Occasional (29-5%)
HP:0002205 Recurrent respiratory infections Occasional (29-5%)
HP:0002376 Developmental regression Occasional (29-5%)
HP:0002558 Supernumerary nipple Occasional (29-5%)
HP:0002607 Bowel incontinence Occasional (29-5%)
HP:0002650 Scoliosis Occasional (29-5%)
HP:0002714 Downturned corners of mouth Occasional (29-5%)
HP:0002779 Tracheomalacia Occasional (29-5%)
HP:0004322 Short stature Occasional (29-5%)
HP:0004415 Pulmonary artery stenosis Occasional (29-5%)
HP:0006288 Advanced eruption of teeth Occasional (29-5%)
HP:0008736 Hypoplasia of penis Occasional (29-5%)
HP:0100716 Self-injurious behavior Occasional (29-5%)
HP:0100790 Hernia Occasional (29-5%)


Phenotype(s) retrieved from case reports

    Total: 11

HPO ID Term # of case reports
HP:0001249 Intellectual disability 4
HP:0000316 Hypertelorism 2
HP:0000054 Micropenis 1
HP:0000135 Hypogonadism 1
HP:0000243 Trigonocephaly 1
HP:0000343 Long philtrum 1
HP:0001629 Ventricular septal defect 1
HP:0003196 Short nose 1
HP:0010864 Intellectual disability, severe 1
HP:0010880 Increased nuchal translucency 1
HP:0012368 Flat face 1


Causative gene(s) retrieved from Orphanet

    Total: 0

Gene Symbol Gene Name Entrez Gene ID