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Saethre-Chotzen Syndrome - Twist Gene Analysis
Clinical Genetic Test
Help
offered by
Center for Genetics at Saint Francis
View lab's test page
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GTR Test Accession: Help GTR000504098.5
CAP
INHERITED DISEASEDYSMORPHOLOGYMUSCULOSKELETAL ... View more
Last updated in GTR: 2024-07-26
View version history
Last annual review date for the lab: 2024-07-30 LinkOut
At a Glance
Test purpose: Help
Diagnosis; Mutation Confirmation
Conditions (1): Help
Saethre-Chotzen syndrome
Genes (1): Help
TWIST1 (7p21.1)
Methods (1): Help
Molecular Genetics - Sequence analysis of the entire coding region: Bi-directional Sanger Sequence Analysis
Target population: Help
Individuals exhibiting symptoms consistent with Saethre-chotzen syndrome; classic SCS is …
Clinical validity: Help
Not provided
Clinical utility: Help
Establish or confirm diagnosis
Ordering Information
Offered by: Help
Center for Genetics at Saint Francis
View lab's website
View lab's test page
Specimen Source: Help
Who can order: Help
  • Genetic Counselor
  • Health Care Provider
  • Licensed Physician
  • Nurse Practitioner
  • Physician Assistant
Lab contact: Help
Lynne Whetsell, BS, MB(ASCP), Staff
lhwhetsell@saintfrancis.com
918-502-3808
Tonya Jones, BS, CG(ASCP), MB(ASCP), Administrator
tsjones@saintfrancis.com
918-502-1730
How to Order: Help
1. Choose the desired test from the Test Directory.
2. Obtain information on the required specimen for the specific test from the Test Information page.
3. Fill out the necessary test requisition form and any other required forms from the Forms page.
4. Provide the required Billing information or make …
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Order URL
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, Contact policy, 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 the entire coding region
Bi-directional Sanger Sequence Analysis
Applied Biosystems 3130 Capillary Sequencing Instrument
Clinical Information
Test purpose: Help
Diagnosis; Mutation Confirmation
Clinical utility: Help
Establish or confirm diagnosis
View citations (1)

Target population: Help
Individuals exhibiting symptoms consistent with Saethre-chotzen syndrome; classic SCS is characterized by coronal synostosis (unilateral or bilateral), facial asymmetry, ptosis, and characteristic appearance of the ear. Syndactyly of digits two and three of the hand is variably present. Intelligence is usually normal, but mild to moderate mental retardation may be … View more
Variant Interpretation:
What is the protocol for interpreting a variation as a VUS? Help
HGMD, Disease specific databases and an Internal Variant Database are used for variant interpretation. An assessment is also made with a splice site predictor program. Once established as a VUS, Polyphen and SIFT analyses are performed to help provide an interpretation.

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

Will the lab re-contact the ordering physician if variant interpretation changes? Help
Not provided.
Recommended fields not provided:
Clinical validity, 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
Test Procedure: Help
Confirmation is performed on a new blood specimen (if submitted) and a separate DNA preparation using the same methodology.
Test Confirmation: Help
Confirmation is performed on a new blood specimen (if submitted) and a separate DNA preparation using the same methodology.
Test Comments: Help
Target is also part of the Craniodysmorphology Panel
Availability: Help
Tests performed
Entire test performed in-house
Analytical Validity: Help
Analytical sensitivity, specificity and accuracy greater than 99%; determined by in-house validations.
View citations (1)
Proficiency testing (PT):
Is proficiency testing performed for this test? Help
Yes

Method used for proficiency testing: Help
CAP Survey MGL3 for Sequencing Platform

PT Provider: Help
American College of Medical Genetics / College of American Pathologists, ACMG/CAP
VUS:
Software used to interpret novel variations Help
Polyphen and SIFT

Laboratory's policy on reporting novel variations Help
Routine Report
Recommended fields not provided:
Assay limitations, Description of internal test validation method, 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.