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NC_000003.12:g.(?_179203534)_(179234364_?)dup AND Cowden syndrome

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Mar 22, 2021
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:
RCV001033499.7

Allele description [Variation Report for NC_000003.12:g.(?_179203534)_(179234364_?)dup]

NC_000003.12:g.(?_179203534)_(179234364_?)dup

Gene:
PIK3CA:phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha [Gene - OMIM - HGNC]
Variant type:
Duplication
Cytogenetic location:
3q26.32
Genomic location:
Chr3: 178921322 - 178952152 (on Assembly GRCh37)
Preferred name:
NC_000003.12:g.(?_179203534)_(179234364_?)dup
HGVS:
  • NC_000003.12:g.(?_179203534)_(179234364_?)dup
  • NC_000003.11:g.(?_178921322)_(178952152_?)dup

Condition(s)

Name:
Cowden syndrome (CS)
Synonyms:
Cowden's disease; Cowden's syndrome; Cowden disease
Identifiers:
MONDO: MONDO:0016063; MedGen: C0018553; Orphanet: 201; OMIM: PS158350

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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV001196806Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Uncertain significance
(Mar 22, 2021) 		germlineclinical testing

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

Help

Summary from all submissions

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

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group, Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9..

PubMed [citation]
PMID:
28492532
PMCID:
PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV001196806.4

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

Description

This variant results in a copy number gain of the genomic region encompassing exons 5-21 of the PIK3CA gene. The 5' boundary is likely confined to intron 4. The 3' end of this event is unknown as it extends beyond the assayed region for this gene and therefore may encompass additional genes. As the precise location of this event is unknown, it may be in tandem or it may be located elsewhere in the genome. This variant has not been reported in the literature in individuals with PIK3CA-related conditions. Experimental studies and prediction algorithms are not available or were not evaluated for this variant, and the functional significance of this variant is currently unknown. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

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

Last Updated: Oct 12, 2025