GeneSeq® Cardio: Noonan Syndrome/RASopathies Panel

GeneSeq®: Cardio – Noonan Syndrome/RASopathies Panel
GeneSeq® Cardio: Noonan Syndrome/RASopathies Panel
CPT: 81442
Updated on 07/16/2024
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Synonyms

  • Cardiofaciocutaneous syndrome
  • Costello syndrome
  • LEOPARD syndrome

Test Includes

This test includes the following genes: BRAF, CBL, HRAS, KRAS, LZTR1, MAP2K1, MAP2K2, MRAS, NF1, NRAS, PPP1CB, PTPN11, RAF1, RASA2, RIT1, RRAS, SHOC2, SOS1, SOS2 and SPRED1.


Special Instructions

In cases in which there is a known variant documented in the family, the physician may prefer to order Targeted Variant Analysis [482552].

Test orders must include an attestation that the provider has the patient's informed consent for genetic testing.


Expected Turnaround Time

14 - 21 days (In some cases, additional time may be required for confirmatory or reflex tests.)



Specimen Requirements


Specimen

Whole blood or PurFlock buccal swab kit or Oragene Dx 500 saliva kit


Volume

8.5 mL whole blood or PurFlock buccal swab kit or Oragene Dx saliva kit


Minimum Volume

3 mL whole blood or PurFlock buccal swab kit or Oragene Dx saliva kit


Container

Yellow-top (ACD-A) tube or lavender-top (EDTA) tube or PurFlock buccal swab kit or Oragene Dx 500 saliva collection kit


Collection

Standard phlebotomy; follow PurFlock buccal swab kit or Oragene Dx 500 saliva kit collection instructions. Do not eat, drink, smoke, or chew gum 30 minutes prior to collection.


Storage Instructions

Maintain specimen at room temperature or refrigerate at 4°C. Do not freeze.


Stability Requirements

Whole blood: 14 days at room temperature or 30 days at 4°C

Buccal: 60 days at room temperature

Saliva: 60 days at room temperature


Causes for Rejection

Frozen or hemolyzed specimen; quantity not sufficient for analysis; improper container


Test Details


Use

This test is used for diagnostic testing for Noonan syndrome and other RASopathies, including LEOPARD syndrome, Costello syndrome and cardiofaciocutaneous syndrome. It also is used for presymptomatic testing for family members.


Limitations

Technologies used do not detect germline mosaicism and do not rule out the presence of large chromosomal aberrations including rearrangements and gene fusions, or variants in regions or genes not included in this test, or possible inter/intragenic interactions between variants or repeat expansions.

Variant classification and/or interpretation may change over time if more information becomes available. False positive or false negative results may occur for reasons that include: rare genetic variants, sex chromosome abnormalities, pseudogene interference, blood transfusions, bone marrow transplantation, somatic or tissue-specific mosaicism, mislabeled samples or erroneous representation of family relationships.

This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.


Methodology

Next Generation Sequencing: Identifies genetic variants, including small nucleotide variants (SNVs), insertions, deletions and copy number variants (CNVs).

Next Generation Sequencing: Identifies genetic variants, including small nucleotide variants (SNVs), insertions and deletions.

Next Generation Sequencing: Identifies genetic variants, including small nucleotide variants (SNVs), insertions, deletions and copy number variants (CNVs).


References

Hershberger RE, Givertz, Ho CY et al. Genetic evaluation of cardiomyopathy: a clinical practice resource of the American College of Medical Genetics and Genomics (ACMG). Genet Med. 2018 Sep;20(9):899-909.29904160
Musunuru K, Hershberger RE, Day SM et al. Genetic testing for inherited cardiovascular diseases: a scientific statement from the American Heart Association. Circ Genom Precis Med. 2020 Aug;13(4):e000067.32698598

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
482279 Noonan Syndrome Panel 482262 Genes 48018-6
482279 Noonan Syndrome Panel 482263 Ethnicity 42784-9
482279 Noonan Syndrome Panel 482264 Specimen Type 31208-2
482279 Noonan Syndrome Panel 482265 Genetic Counselor 89993-0
482279 Noonan Syndrome Panel 482266 Indication 42349-1
482279 Noonan Syndrome Panel 482267 Result: 48003-8
482279 Noonan Syndrome Panel 482268 Interpretation 53039-4
482279 Noonan Syndrome Panel 482269 General Comments 8262-8
482279 Noonan Syndrome Panel 482270 Recommendations 62385-0
482279 Noonan Syndrome Panel 482271 Additional ClinicalInformation 55752-0
482279 Noonan Syndrome Panel 482272 Comments 8251-1
482279 Noonan Syndrome Panel 482273 Methods/Limitations 49549-9
482279 Noonan Syndrome Panel 482274 References 75608-0
482279 Noonan Syndrome Panel 482275 Genes Analyzed 48018-6
482279 Noonan Syndrome Panel 482276 Director Review/Release 42786-4
482279 Noonan Syndrome Panel 482277 PDF 51969-4

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The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf