Cardio-Facio-Cutaneous Syndrome via the MAP2K2 Gene

Summary and Pricing

Test Method

Sequencing and CNV Detection via NextGen Sequencing using PG-Select Capture Probes
Test Code Test Copy GenesTest CPT Code Gene CPT Codes Copy CPT Codes Base Price
8457 MAP2K2 81406 81406,81479 $640 Order Options and Pricing
Test Code Test Copy Genes Test CPT Code Gene CPT Codes Copy CPT Code Base Price
8457MAP2K281406 81406(x1), 81479(x1) $640 Order Options and Pricing

Pricing Comments

This test is also offered via our exome backbone with CNV detection (click here). The exome-based test may be higher priced, but permits reflex to the entire exome or to any other set of clinically relevant genes.

An additional 25% charge will be applied to STAT orders. STAT orders are prioritized throughout the testing process.

Turnaround Time

18 days on average for standard orders or 13 days on average for STAT orders.

Please note: Once the testing process begins, an Estimated Report Date (ERD) range will be displayed in the portal. This is the most accurate prediction of when your report will be complete and may differ from the average TAT published on our website. About 85% of our tests will be reported within or before the ERD range. We will notify you of significant delays or holds which will impact the ERD. Learn more about turnaround times here.

Targeted Testing

For ordering sequencing of targeted known variants, go to our Targeted Variants page.

EMAIL CONTACTS

Genetic Counselors

Geneticist

  • Brett Deml, PhD

Clinical Features and Genetics

Clinical Features

Cardio-facio-cutaneous syndrome (CFCS, OMIM 115150) is a rare developmental disorder characterized by distinctive facial appearance, congenital cardiac and ectodermal abnormalities, postnatal growth failure, feeding difficulties with failure to thrive, and neurological findings. Facial features include high forehead; short, upturned nose with a low nasal bridge; prominent external ears that are posteriorly angulated; and ocular hypertelorism. The most common cardiac abnormalities include pulmonic stenosis and atrial septal defects. Ectodermal abnormalities are heterogeneous in features and severity. They include café au lait spots, erythema, keratosis, ichthyosis, eczema, sparse and brittle hair, and nail dystrophy. The neurological findings include seizures, hypotonia, macrocephaly and various degrees of mental and cognitive delay (Reynolds et al. Am J Med Genet 25:413-427, 1986).

Genetics

CFCS is caused by variants in four genes within the RAS/MAPK pathway: BRAF, MAP2K1, MAP2K2, and KRAS (Rodriguez-Viciana et al. Science 311:1287-1290, 2006; Niihori et al. Nat Genet 38:294-296, 2006). Sixteen MAP2K2 germline variants, including 14 missense variants and two small deletions, have been reported in patients with CFCS to date. MAP2K2 variants account for ~ 6% of all cases genotyped (Schulz et al. Clin Genet 73: 62-70, 2008). Although most variants reported to date were found in exons 2 and 3, one CFCS-causative variant was found in exon 7. While most CFCS patients with MAP2K2 variants are sporadic resulting from de novo dominant variants, one MAP2K2 variant, was reported in a mutigenerational family with CFCS (Rauen et al. Am J Med Genet A 152A:807-814, 2010). To date, no mosaicism in the MAP2K2 gene has been reported in CFCS patients (Rauen, 2010). Somatic recurrent MAP2K2 variants have been implicated in several human cancers including melanoma (Nikolaev et al. Nat Genet 44:133-139, 2011). The MAP2K2 gene encodes the MEK2 protein, a member of the RAS/MAPK pathway that is involved in the control of cell proliferation, migration, division and differentiation.

Clinical Sensitivity - Sequencing with CNV PG-Select

This test will detect causative MAP2K1 variants in ~ 6% of CFCS patients (Schulz, Clin Genet 73:62-70, 2008).

Testing Strategy

This test provides full coverage of all coding exons of the MAP2K2 gene, plus ~10 bases of flanking noncoding DNA. We define full coverage as >20X NGS reads or Sanger sequencing.

Indications for Test

Patients with a clinical diagnosis of CFCS who do not have variants in BRAF and MAP2K1 are candidates for this test. As the clinical features of Noonan syndrome and Costello syndrome overlap with CFCS, patients who test negative for variants in the genes most commonly associated with those conditions are also candidates.

Gene

Official Gene Symbol OMIM ID
MAP2K2 601263
Inheritance Abbreviation
Autosomal Dominant AD
Autosomal Recessive AR
X-Linked XL
Mitochondrial MT

Disease

Name Inheritance OMIM ID
Cardiofaciocutaneous syndrome 4 615280

Related Tests

Name
Comprehensive Cardiology Panel
Fetal Concerns Panel

Citations

  • Niihori T, Aoki Y, Narumi Y, Neri G, Cavé H, Verloes A, Okamoto N, Hennekam RCM, Gillessen-Kaesbach G, Wieczorek D, Kavamura MI, Kurosawa K, Ohashi H, Wilson L, Heron D, Bonneau D, Corona G, Kaname T, Naritomi K, Baumann C, Matsumoto N, Kato K, Kure S, Matsubara Y. 2006. Germline KRAS and BRAF mutations in cardio-facio-cutaneous syndrome. Nat. Genet. 38: 294–296. PubMed ID: 16474404
  • Nikolaev SI, Rimoldi D, Iseli C, Valsesia A, Robyr D, Gehrig C, Harshman K, Guipponi M, Bukach O, Zoete V, Michielin O, Muehlethaler K, Speiser D, Beckmann JS, Xenarios I, Halazonetis TD, Jongeneel CV, Stevenson BJ, Antonarakis SE. 2011. Exome sequencing identifies recurrent somatic MAP2K1 and MAP2K2 mutations in melanoma. Nature Genetics 44: 133–139. PubMed ID: 22197931
  • Rauen KA. 2010. Cardiofaciocutaneous Syndrome. In: Pagon RA, Adam MP, Ardinger HH, Bird TD, Dolan CR, Fong C-T, Smith RJ, and Stephens K, editors. GeneReviews(®), Seattle (WA): University of Washington, Seattle. PubMed ID: 20301365
  • Reynolds JF, Neri G, Herrmann JP, Blumberg B, Coldwell JG, Miles PV, Opitz JM. 1986. New multiple congenital anomalies/mental retardation syndrome with cardio-facio-cutaneous involvement--the CFC syndrome. Am. J. Med. Genet. 25: 413–427. PubMed ID: 3789005
  • Rodriguez-Viciana P, Tetsu O, Tidyman WE, Estep AL, Conger BA, Cruz MS, McCormick F, Rauen KA.. 2006. Germline Mutations in Genes Within the MAPK Pathway Cause Cardio-facio-cutaneous Syndrome. Science 311: 1287–1290. PubMed ID: 16439621
  • Schulz, A. L., et.al. (2008). "Mutation and phenotypic spectrum in patients with cardio-facio-cutaneous and Costello syndrome." Clin Genet 73(1): 62-70. PubMed ID: 18042262

Ordering/Specimens

Ordering Options

We offer several options when ordering sequencing tests. For more information on these options, see our Ordering Instructions page. To view available options, click on the Order Options button within the test description.

myPrevent - Online Ordering

  • The test can be added to your online orders in the Summary and Pricing section.
  • Once the test has been added log in to myPrevent to fill out an online requisition form.
  • PGnome sequencing panels can be ordered via the myPrevent portal only at this time.

Requisition Form

  • A completed requisition form must accompany all specimens.
  • Billing information along with specimen and shipping instructions are within the requisition form.
  • All testing must be ordered by a qualified healthcare provider.

For Requisition Forms, visit our Forms page


Specimen Types

Specimen Requirements and Shipping Details

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ORDER OPTIONS

View Ordering Instructions

1) Select Test Method (Backbone)


1) Select Test Type


2) Select Additional Test Options

STAT and Prenatal Test Options are not available with Patient Plus.

No Additional Test Options are available for this test.

Note: acceptable specimen types are whole blood and DNA from whole blood only.
Total Price: $
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