Monosomy 21

Monosomy 21 is a chromosomal anomaly characterized by the loss of variable portions of a segment of the long arm of chromosome 21 that leads to an increased risk of birth defects, developmental delay and intellectual deficit.



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Narrow down the case reports



Total: 52 (papers)

  


(per page)
Matched Phenotype  Gene  Mutation  MeSH
Rank
(Similarity)
PMID
(PMCID)
1
(66.3%)
22482972
Mosaic ring chromosome 21, monosomy 21, and isodicentric ring chromosome 21: prenatal diagnosis, molecular cytogenetic characterization, and association with 2-Mb deletion of 21q21.1-q21.2 and 5-Mb deletion of 21q22.3.
Chen CP, Lin YH, Chou SY, Su YN, Chern SR, Chen YT, Town DD, Chen WL, Wang W.
Taiwan J Obstet Gynecol. 2012;51(1):71-6.
Long philtrum Micrognathia
Adult Base Sequence Chromosomes, Human, Pair 21 Females Fetal Diseases Homo sapiens Monosomy Pregnancy Ring Chromosomes Sequence Deletion Ultrasonography
2
(63.5%)
7328100
Separating monosomy-21 from the "arthrogryposis basket".
Houston CS, Chudley AE.
J Can Assoc Radiol. 1981;32(4):220-3.
Micrognathia Slanting of the palpebral fissure
Arthrogryposis Bone and Bones Chromosome Aberrations Chromosomes, Human, 21-22 and Y Congenital Foot Deformity Differential Diagnosis Homo sapiens Infant, Newborn Syndrome
3
(60.5%)
511168
A low frequency mosaicism for monosomy 21 in a live born female.
Lee M, Rose D, Lazzarini A, Rajendra BR, Sciorra LJ.
Hum Genet. 1979;51(3):343-7.
Narrow palate Micrognathia
Chromosome Aberrations Chromosomes, Human, 21-22 and Y Females Homo sapiens Infant Lymphocyte Mosaicism Skin
4
(59.0%)
9370908
Hypogammaglobulinaemia in a patient with ring chromosome 21.
Ohga S, Nakao F, Narazaki O, Fusazaki N, Aoki T, Kamesaki K, Hara T.
Arch Dis Child. 1997;77(3):252-4.
Micrognathia Prominent nasal bridge
Agammaglobulinemia Child, Preschool Chromosomes, Human, Pair 21 Homo sapiens Male Monosomy Otitis Media Pneumonia Ring Chromosomes Seizures
4
(59.0%)
468232
A case of 21q--syndrome with normal SOD-1 activity.
Yamamoto Y, Ogasawara N, Gotoh A, Komiya H, Nakai H, Kuroki Y.
Hum Genet. 1979;48(3):321-7.
Micrognathia Preauricular pit
Chromosome Banding Chromosome Deletion Chromosomes, Human, 21-22 and Y Erythrocytes Females Homo sapiens Infant, Newborn Intellectual Disability
6
(47.5%)
15658619
De novo satellited 21q associated with corpus callosum dysgenesis, colpocephaly, a concealed penis, congenital heart defects, and developmental delay.
Chen CP, Lin SP, Chern SR, Lee CC, Huang JK, Wang W, Liao YW.
Genet Couns. 2004;15(4):437-42.
Microcephaly Broad philtrum
Alleles Chromosome Aberrations Chromosome Deletion Chromosomes, Human, Pair 21 Congenital Heart Defects DNA, Satellite Genetic Markers Genotype Holoprosencephaly Homo sapiens Infant Intellectual Disability Male Microcephaly Monosomy
7
(43.9%)
17710869
Coexistent mosaic monosomy 21 and fragile X syndrome in a mentally retarded male patient.
Utine GE, Aktas D, Boduroglu K, Alikasifoglu M, Tuncbilek E.
Genet Couns. 2007;18(2):171-7.
Macrocephaly Long face Retrognathia
Child, Preschool Chromosome Aberrations Chromosome Painting Chromosomes, Human, Pair 21 Comorbidity Craniofacial Abnormalities Facies Fluorescent in Situ Hybridization Fragile X Syndrome Homo sapiens Intellectual Disability Male Monosomy Mosaicism Phenotype
8
(42.6%)
29258104
Deletion 21pterq22.11: Report of a Patient with Dysmorphic Features, Hypertonia, and Cafe-au-Lait Macules and Review of the Literature.
Malinverni ACM, Yamashiro Coelho EM, Chen K, Colovati ME, Soares Pinho Cernach MC, Bragagnolo S, Melaragno MI.
Cytogenet Genome Res. 2017;153(2):81-85.
Long philtrum Hypertonia
H3F3AP4 KAT2B
Cafe-au-Lait Spots Chromosome Deletion Chromosomes, Human, Pair 21 Developmental Disabilities Face Females Hearing Loss, Bilateral Homo sapiens Infant, Newborn Muscle Hypertonia Phenotype
9
(39.0%)
24458657
A de novo 1.4-Mb deletion at 21q22.11 in a boy with developmental delay.
Fukai R, Hiraki Y, Nishimura G, Nakashima M, Tsurusaki Y, Saitsu H, Matsumoto N, Miyake N.
Am J Med Genet A. 2014;164A(4):1021-8.
Microcephaly
ITSN1
Adaptor Proteins, Vesicular Transport Chromosome Deletion Chromosomes, Human, Pair 21 Developmental Disabilities Homo sapiens Infant Male Phenotype
9
(39.0%)
20420031
Atypical Down syndrome phenotype in a girl with 21;21 translocation trisomy.
Tuysuz B, Yavuz A, Ozdil M, Caferler J, Ozon H.
Genet Couns. 2010;21(1):61-7.
Microcephaly
Child Chromosomes, Human, Pair 21 Down Syndrome Females Homo sapiens Monosomy Mosaicism Ring Chromosomes
        

Phenotype(s) retrieved from Orphanet

    Total: 0

HPO ID Term Frequency


Phenotype(s) retrieved from case reports

    Total: 21

HPO ID Term # of case reports
HP:0001873 Thrombocytopenia 2
HP:0001909 Leukemia 2
HP:0000027 Azoospermia 1
HP:0000252 Microcephaly 1
HP:0000347 Micrognathia 1
HP:0000426 Prominent nasal bridge 1
HP:0000463 Anteverted nares 1
HP:0000647 Sclerocornea 1
HP:0001276 Hypertonia 1
HP:0001373 Joint dislocation 1
HP:0001508 Failure to thrive 1
HP:0001643 Patent ductus arteriosus 1
HP:0002079 Hypoplasia of the corpus callosum 1
HP:0002719 Recurrent infections 1
HP:0002721 Immunodeficiency 1
HP:0002860 Squamous cell carcinoma 1
HP:0004937 Pulmonary artery aneurysm 1
HP:0008846 Severe intrauterine growth retardation 1
HP:0010566 Hamartoma 1
HP:0010880 Increased nuchal translucency 1
HP:0025356 Psychomotor retardation 1


Causative gene(s) retrieved from Orphanet

    Total: 0

Gene Symbol Gene Name Entrez Gene ID