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Costello Syndrome (HRAS gene)
Clinical Genetic Test
Help
offered by
Molecular Genetics and Cytogenetics, Clinical Laboratory Service
GTR Test Accession: Help GTR000568242.4
INHERITED DISEASECARDIOVASCULARDYSMORPHOLOGY ... View more
Last updated in GTR: 2020-08-10
View version history
Last annual review date for the lab: 2023-07-28 LinkOut
At a Glance
Test purpose: Help
Diagnosis; Mutation Confirmation
Conditions (1): Help
Costello syndrome
Genes (1): Help
HRAS (11p15.5)
Methods (1): Help
Molecular Genetics - Sequence analysis of select exons: Bi-directional Sanger Sequence Analysis
Target population: Help
Not provided
Clinical validity: Help
More than 80% of patients with Costello syndrome share the …
Clinical utility: Help
Establish or confirm diagnosis
Ordering Information
Offered by: Help
Molecular Genetics and Cytogenetics, Clinical Laboratory Service
View lab's website
Test short name: Help
Costello syndrome
Specimen Source: Help
Who can order: Help
  • Licensed Physician
Test Order Code: Help
2666
Lab contact: Help
Marcela Lagos, MD, Lab Director
mlagos@med.puc.cl
+56 223548515
Contact Policy: Help
Laboratory can only accept contact from health care providers. Patients/families are encouraged to discuss genetic testing options with their health care provider.
Test service: Help
Clinical Testing/Confirmation of Mutations Identified Previously
Informed consent required: Help
Decline to answer
Pre-test genetic counseling required: Help
Decline to answer
Post-test genetic counseling required: Help
Decline to answer
Recommended fields not provided:
How to Order, Test strategy, Test development
Conditions Help
Total conditions: 1
Condition/Phenotype Identifier
Test Targets
Genes Help
Total genes: 1
Gene Associated Condition Germline or Somatic Allele (Lab-provided) Variant in NCBI
Methodology
Total methods: 1
Method Category Help
Test method Help
Instrument *
Sequence analysis of select exons
Bi-directional Sanger Sequence Analysis
* Instrument: Not provided
Clinical Information
Test purpose: Help
Diagnosis; Mutation Confirmation
Clinical validity: Help
More than 80% of patients with Costello syndrome share the pathogenic variant p.Gly12Ser in HRAS gene.
View citations (1)
  • Male-to-male transmission of Costello syndrome: G12S HRAS germline mutation inherited from a father with somatic mosaicism. Sol-Church K, et al. Am J Med Genet A. 2009;149A(3):315-21. doi:10.1002/ajmg.a.32639. PMID: 19206176.
Clinical utility: Help
Establish or confirm diagnosis
View citations (1)
  • HRAS mutation analysis in Costello syndrome: genotype and phenotype correlation. Gripp KW, et al. Am J Med Genet A. 2006;140(1):1-7. doi:10.1002/ajmg.a.31047. PMID: 16329078.

Variant Interpretation:
What is the protocol for interpreting a variation as a VUS? Help
ACMG-AMP guidelines for the interpretation of sequence variants, 2015 (PMID: 25741868).

Are family members with defined clinical status recruited to assess significance of VUS without charge? Help
Decline to answer.

Will the lab re-contact the ordering physician if variant interpretation changes? Help
Decline to answer.
Recommended fields not provided:
Target population, Is research allowed on the sample after clinical testing is complete?, Sample negative report, Sample positive report
Technical Information
Availability: Help
Tests performed
Entire test performed in-house
Analytical Validity: Help
For validation, exon 2 of HRAS gene from three samples were analyzed (1 patient with Costello syndrome and 2 control samples). The variant detected in the patient was p.Gly12Ser (most frequent pathogenic variant). No pathogenic variants were found in the control samples. Sequencing analysis approaches an analytical sensitivity of almost … View more
Proficiency testing (PT):
Is proficiency testing performed for this test? Help
No
Recommended fields not provided:
Test Confirmation, Assay limitations, Description of internal test validation method, Citations for Analytical validity, PT Provider, Description of PT method, Major CAP category, CAP category, CAP test list
Regulatory Approval
FDA Review: Help
Not provided
Additional Information

IMPORTANT NOTE: NIH does not independently verify information submitted to GTR; it relies on submitters to provide information that is accurate and not misleading. NIH makes no endorsements of tests or laboratories listed in GTR. GTR is not a substitute for medical advice. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.