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Prader Willi Syndrome Methylation Analysis
Clinical Genetic Test
Help
offered by
Cincinnati Children's Hospital Medical Center Genetics and Genomics Diagnostic Laboratory
View lab's test page
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GTR Test Accession: Help GTR000204881.3
INHERITED DISEASEDYSMORPHOLOGYENDOCRINOLOGY ... View more
Last updated in GTR: 2014-11-18
View version history
Last annual review date for the lab: 2023-07-31 LinkOut
At a Glance
Test purpose: Help
Diagnosis
Conditions (1): Help
Prader-Willi syndrome
Genes (1): Help
SNRPN (15q11.2)
Methods (1): Help
Molecular Genetics - Methylation analysis: PCR on sodium bisulfite treated DNA
Target population: Help
Not provided
Clinical validity: Help
Not provided
Clinical utility: Help
Not provided
Ordering Information
Offered by: Help
Cincinnati Children's Hospital Medical Center Genetics and Genomics Diagnostic Laboratory
View lab's website
View lab's test page
Test short name: Help
PWS
Lab contact: Help
Lab Administration, Administrator
LabGeneticCounselors@cchmc.org
513-636-4474
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.
How to Order: Help
Order URL
Test development: Help
Test developed by laboratory (no manufacturer test name)
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:
Test Order Code, Specimen source, Test strategy
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 *
Methylation analysis
PCR on sodium bisulfite treated DNA
* Instrument: Not provided
Clinical Information
Test purpose: Help
Diagnosis
Recommended fields not provided:
Clinical validity, Clinical utility, Target population, What is the protocol for interpreting a variation as a VUS?, Are family members with defined clinical status recruited to assess significance of VUS without charge?, Will the lab re-contact the ordering physician if variant interpretation changes?, 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
A maternal-only pattern is 100% diagnostic of PWS.
Assay limitations: Help
Additional studies including fluorescent in situ hybridization (FISH) to identify large gene deletions and uniparental disomy (UPD) analysis should be considered to determine the specific genetic etiology of the disorder for genetic counseling purposes.
Proficiency testing (PT):
Is proficiency testing performed for this test? Help
Yes
Recommended fields not provided:
Test Confirmation, Citations to support 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
Category: FDA exercises enforcement discretion
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.