Trisomy 20p

Trisomy 20p is a chromosomal disorder resulting from duplication of all or part of the short arm of chromosome 20. It is mostly characterized by normal growth, mild to moderate intellectual disability, speech delay, poor coordination and evocative facial features.



Input patient's signs and symptoms


Narrow down the case reports



Total: 19 (papers)

  


(per page)
Matched Phenotype  Gene  Mutation  MeSH
Rank
(Similarity)
PMID
(PMCID)
1
(66.3%)
3879151
[Trisomy 20p derived from a maternal pericentric inversion and brachymesophalangy of the index finger].
Lucas J, Le Mee F, Le Marec B, Pluquailec K, Journel H, Picard F.
Ann Genet. 1985;28(3):167-71.
Microretrognathia Round face Upslanted palpebral fissure Brachydactyly
Child, Preschool Chromosomes, Human, 19-20 Fingers Homo sapiens Male Phenotype Toes Trisomy
2
(66.3%)
21199750
Chromosome 1p36 deletion syndrome: prenatal diagnosis, molecular cytogenetic characterization and fetal ultrasound findings.
Chen CP, Chen M, Su YN, Hsu CY, Tsai FJ, Chern SR, Wu PC, Lee CC, Wang W.
Taiwan J Obstet Gynecol. 2010;49(4):473-80.
Pointed chin Long philtrum Micrognathia
Adult Amniocentesis Chromosome Deletion Chromosomes, Human, Pair 1 Congenital Heart Defects Females Fetal Diseases Homo sapiens Maxillofacial Abnormalities Pregnancy Ultrasonography, Prenatal
3
(63.5%)
12838568
Distal monosomy 18p/distal trisomy 20p--a recognizable facial phenotype?
Wieczorek D, Bartsch O, Gillessen-Kaesbach G.
Am J Med Genet A. 2003;120A(3):429-33.
Micrognathia Telecanthus
Child, Preschool Chromosome Deletion Chromosomes, Human, Pair 18 Chromosomes, Human, Pair 20 Cytogenetic Analysis Developmental Disabilities Facies Fluorescent in Situ Hybridization Homo sapiens Male Trisomy
4
(60.4%)
25847371
Dissecting the phenotype of supernumerary marker chromosome 20 in a patient with syndromic Pierre Robin sequence: combinatorial effect of gene dosage and uniparental disomy.
Izumi K, Kubota N, Arakawa M, Takayama M, Harada Y, Nakamura T, Nishi E, Hidaka E.
Am J Med Genet A. 2015;167(6):1289-93.
Pierre-Robin sequence Micrognathia
Chromosome Banding Chromosomes, Human, Pair 20 Cleft Palate Developmental Disabilities Females Gene Dosage Genetic Association Studies Genetic Markers Homo sapiens Infant Micrognathism Mosaicism Phenotype Pierre Robin Syndrome Pregnancy Trisomy
5
(44.7%)
10494096
Detection of a cryptic translocation t(13;20)(q34;p13) in an unexplained case of MCA/MR: value of FISH over high resolution banding.
de Die-Smulders CE, Engelen JJ, Albrechts JC, Hamers GJ.
Am J Med Genet. 1999;86(4):385-8.
Microcephaly Epicanthus
Child Chromosome Aberrations Chromosome Banding Chromosome Deletion Chromosome Painting Chromosomes, Human, Pair 13 Chromosomes, Human, Pair 20 Facies Fluorescent in Situ Hybridization Homo sapiens Intellectual Disability Male
6
(33.1%)
22259786
(3255494)
A case of partial trisomy 20p resulting from meiotic recombination of a maternal pericentric inversion.
Kang JE, Park MY, Cheon CK, Lee HD, Hwang SH, Yi J.
Ann Lab Med. 2012;32(1):91-4.
Ambiguous genitalia Sacral dimple Clinodactyly
Adult Chromosomes, Human, Pair 20 Females Homo sapiens Infant, Newborn Phenotype Recombination, Genetic Trisomy
7
(26.3%)
469903
Trisomy 20p from maternal t(3;20) translocation.
Archidiacono N, Tecilazich D, Tonini G, Rocchi M, Filippi G.
J Med Genet. 1979;16(3):229-32.
Round face
Child, Preschool Chromosomes, Human, 19-20 Face Females Homo sapiens Strabismus Tetralogy of Fallot Trisomy
7
(26.3%)
302689
Familial trisomy 20p five cases and two carriers in three generations a review.
Centerwall W, Francke U.
Ann Genet. 1977;20(2):77-83.
Round face
Child Chromosomes, Human, 19-20 Females Homo sapiens Intellectual Disability Male Trisomy
9
(23.3%)
17431912
De novo trisomy 20p of paternal origin.
Chaabouni M, Turleau C, Karboul L, Jemaa LB, Maazoul F, Attie-Bitach T, Romana S, Chaabouni H.
Am J Med Genet A. 2007;143A(10):1100-3.
Cryptorchidism Kyphosis
Child, Preschool Chromosome Banding Chromosomes, Human, Pair 20 Fingers Fluorescent in Situ Hybridization Homo sapiens Male Polydactyly Trisomy
10
(21.2%)
25900371
Mosaic tetrasomy 20p associated with osteoporosis and recurrent fractures.
Maziad AS, Seaver LH.
Am J Med Genet A. 2015;167(7):1582-6.
Osteopenia
BMP2
Chromosomes, Human, Pair 20 Genetic Markers Homo sapiens Male Microarray Analysis Mosaicism Osteoporosis Single Nucleotide Polymorphism Tetrasomy Urothelium
        

Phenotype(s) retrieved from Orphanet

    Total: 71

HPO ID Term Frequency
HP:0000293 Full cheeks Very frequent (99-80%)
HP:0000311 Round face Very frequent (99-80%)
HP:0000411 Protruding ear Very frequent (99-80%)
HP:0000470 Short neck Very frequent (99-80%)
HP:0000574 Thick eyebrow Very frequent (99-80%)
HP:0001252 Muscular hypotonia Very frequent (99-80%)
HP:0001288 Gait disturbance Very frequent (99-80%)
HP:0001999 Abnormal facial shape Very frequent (99-80%)
HP:0002167 Neurological speech impairment Very frequent (99-80%)
HP:0002271 obsolete Autonomic dysregulation Very frequent (99-80%)
HP:0002311 Incoordination Very frequent (99-80%)
HP:0002553 Highly arched eyebrow Very frequent (99-80%)
HP:0002916 Abnormality of chromosome segregation Very frequent (99-80%)
HP:0003312 Abnormal form of the vertebral bodies Very frequent (99-80%)
HP:0005692 Joint hyperflexibility Very frequent (99-80%)
HP:0100543 Cognitive impairment Very frequent (99-80%)
HP:0100790 Hernia Very frequent (99-80%)
HP:0000023 Inguinal hernia Frequent (79-30%)
HP:0000164 Abnormality of the dentition Frequent (79-30%)
HP:0000174 Abnormal palate morphology Frequent (79-30%)
HP:0000248 Brachycephaly Frequent (79-30%)
HP:0000286 Epicanthus Frequent (79-30%)
HP:0000294 Low anterior hairline Frequent (79-30%)
HP:0000316 Hypertelorism Frequent (79-30%)
HP:0000347 Micrognathia Frequent (79-30%)
HP:0000368 Low-set, posteriorly rotated ears Frequent (79-30%)
HP:0000400 Macrotia Frequent (79-30%)
HP:0000463 Anteverted nares Frequent (79-30%)
HP:0000486 Strabismus Frequent (79-30%)
HP:0000582 Upslanted palpebral fissure Frequent (79-30%)
HP:0001156 Brachydactyly Frequent (79-30%)
HP:0001357 Plagiocephaly Frequent (79-30%)
HP:0001537 Umbilical hernia Frequent (79-30%)
HP:0001760 Abnormality of the foot Frequent (79-30%)
HP:0001883 Talipes Frequent (79-30%)
HP:0002162 Low posterior hairline Frequent (79-30%)
HP:0002208 Coarse hair Frequent (79-30%)
HP:0002414 Spina bifida Frequent (79-30%)
HP:0003196 Short nose Frequent (79-30%)
HP:0003272 Abnormality of the hip bone Frequent (79-30%)
HP:0006101 Finger syndactyly Frequent (79-30%)
HP:0100874 Thick hair Frequent (79-30%)
HP:0000028 Cryptorchidism Occasional (29-5%)
HP:0000047 Hypospadias Occasional (29-5%)
HP:0000053 Macroorchidism Occasional (29-5%)
HP:0000069 Abnormality of the ureter Occasional (29-5%)
HP:0000077 Abnormality of the kidney Occasional (29-5%)
HP:0000126 Hydronephrosis Occasional (29-5%)
HP:0000232 Everted lower lip vermilion Occasional (29-5%)
HP:0000233 Thin vermilion border Occasional (29-5%)
HP:0000268 Dolichocephaly Occasional (29-5%)
HP:0000319 Smooth philtrum Occasional (29-5%)
HP:0000322 Short philtrum Occasional (29-5%)
HP:0000494 Downslanted palpebral fissures Occasional (29-5%)
HP:0000581 Blepharophimosis Occasional (29-5%)
HP:0000691 Microdontia Occasional (29-5%)
HP:0000926 Platyspondyly Occasional (29-5%)
HP:0001177 Preaxial hand polydactyly Occasional (29-5%)
HP:0002007 Frontal bossing Occasional (29-5%)
HP:0002564 obsolete Malformation of the heart and great vessels Occasional (29-5%)
HP:0002650 Scoliosis Occasional (29-5%)
HP:0002714 Downturned corners of mouth Occasional (29-5%)
HP:0002808 Kyphosis Occasional (29-5%)
HP:0003422 Vertebral segmentation defect Occasional (29-5%)
HP:0004349 Reduced bone mineral density Occasional (29-5%)
HP:0004397 Ectopic anus Occasional (29-5%)
HP:0005562 Multiple renal cysts Occasional (29-5%)
HP:0006610 Wide intermamillary distance Occasional (29-5%)
HP:0009738 Abnormality of the antihelix Occasional (29-5%)
HP:0100490 Camptodactyly of finger Occasional (29-5%)
HP:0100542 Abnormal localization of kidney Occasional (29-5%)


Phenotype(s) retrieved from case reports

    Total: 6

HPO ID Term # of case reports
HP:0000053 Macroorchidism 1
HP:0000347 Micrognathia 1
HP:0000938 Osteopenia 1
HP:0001629 Ventricular septal defect 1
HP:0002119 Ventriculomegaly 1
HP:0002323 Anencephaly 1


Causative gene(s) retrieved from Orphanet

    Total: 0

Gene Symbol Gene Name Entrez Gene ID