U.S. flag

An official website of the United States government

GRCh37/hg19 18q11.2-23(chr18:23626739-78014976)x3 AND not provided

Germline classification:
Pathogenic (1 submission)
Last evaluated:
Jan 9, 2019
Review status:
1 star out of maximum of 4 stars
criteria provided, single submitter
Somatic classification
of clinical impact:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Somatic classification
of oncogenicity:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Record status:
current
Accession:
RCV001537911.4

Allele description [Variation Report for GRCh37/hg19 18q11.2-23(chr18:23626739-78014976)x3]

GRCh37/hg19 18q11.2-23(chr18:23626739-78014976)x3

Genes:
Variant type:
copy number gain
Cytogenetic location:
18q11.2-23
Genomic location:
Chr18: 23626739 - 78014976 (on Assembly GRCh37)
Preferred name:
GRCh37/hg19 18q11.2-23(chr18:23626739-78014976)x3
HGVS:

    Condition(s)

    Synonyms:
    none provided
    Identifiers:
    MedGen: CN517202

    Recent activity

    Your browsing activity is empty.

    Activity recording is turned off.

    Turn recording back on

    See more...

    Assertion and evidence details

    Submission AccessionSubmitterReview Status
    (Assertion method)
    Clinical Significance
    (Last evaluated)
    OriginMethodCitations
    SCV001754839Illumina Laboratory Services, Illumina
    criteria provided, single submitter

    (ICSL CNVClassificationCriteria Jul2020Prior)
    Pathogenic
    (Jan 9, 2019)
    unknownclinical testing

    PubMed (1)
    [See all records that cite this PMID]

    Citation Link

    Summary from all submissions

    EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
    not providedunknownunknownnot providednot providednot providednot providednot providedclinical testing

    Citations

    PubMed

    The trisomy 18 syndrome.

    Cereda A, Carey JC.

    Orphanet J Rare Dis. 2012 Oct 23;7:81. doi: 10.1186/1750-1172-7-81. Review.

    PubMed [citation]
    PMID:
    23088440
    PMCID:
    PMC3520824

    Details of each submission

    From Illumina Laboratory Services, Illumina, SCV001754839.1

    #EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
    1not providednot providednot providednot providedclinical testing PubMed (1)

    Description

    This CNV is a 54.4 Mb duplication of 18q11.2-q23 on chromosome 18, (seq[GRCh37]dup(18)(q11.2q23, chr18:g.23626739_78014976dup), found in a de novo state. This CNV constitutes a gain encompassing at least 173 genes. The CNV overlaps the well-described trisomy 18 syndrome, also referred to as Edwards syndrome. This syndrome has an estimated population prevalence of 1 in 8000 live births and a female to male prevalence of 3:1, with better survival rates in females (Cereda and Carey 2012). Unbalanced translocations were seen in affected individuals and were inherited from a parent with a balanced translocation, however some also occurred de novo. Around 94% of cases show full trisomy and 5% show mosaic or partial trisomy. The phenotype of partial trisomy 18 is extremely variable and clinical features include growth delay, microcephaly, genitourinary malformations (cryptorchidism and hypotrophic labia), gastrointestinal malformations, characteristic facial features (prominent occiput, micrognathia, and ear abnormalities), structural heart defects, developmental delay, and intellectual disability. Based on the collective evidence, this CNV is classified as pathogenic.

    #SampleMethodObservation
    OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
    1unknownunknownnot providednot providednot providednot providednot providednot providednot provided

    Last Updated: Apr 9, 2023