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Test Code MECP2 Panel MECP2 Panel

Clinical System Name

MECP2 (Rett) Seq + Del/Dup Panel

Description

Rett Syndrome is a neurodevelopmental disorder with a range of phenotypes including: Classic Rett syndrome, Atypical Rett syndrome, and mild learning disabilities. It is characterized by a rapid regression in language and motor skills, followed by long-term stability. During the phase of rapid regression, repetitive, stereotypic hand movements replace purposeful hand use.
 

This test is appropriate for diagnostic confirmation in symptomatic individuals who have a presumptive diagnosis of Rett Syndrome. Panel performed in the following order: MECP2 Sequencing with reflex to MECP2 Deletion/Duplication.

Sample Requirements

Specimen: Whole blood, cord blood

Container(s): Lavender/EDTA, Yellow/ACD A or B

Preferred Vol: 3 mL

Minimum Vol: 1 mL

 

Note: Heparin samples (Green tops) are unacceptable.

  

Specimen: Cultured cells

Acceptable:  Fibroblasts

Container(s): T-25 flasks

Preferred Vol: 2 flasks

Processing Instructions

Reject due to: Heparin, extracted DNA

Spin: No

Aliquot: No

Temp: Refrigerate

Storage location: Molecular Genetics box in CPA refrigerator #2

 

Off-site collection: Refrigerate blood samples until ready to ship.  Transport all sample types at room temperature via overnight shipping.

Stability

Specimen Type Temperature Time
Cultured cells Room temp 3 days
Whole blood Room temp 3-5 days
Whole blood Refrigerated 7 days

 

Note: Whole blood samples > 7days may be submitted to be assessed by our lab for acceptability for testing.

Availability

STAT Performed TAT
Contact lab Monday - Friday 2-3 weeks

 

Performing Laboratory

Seattle Children's Laboratory

Department

Department:  Molecular Genetics Laboratory

Phone: 206-987-3872

 

Lab Client Services: 206-987-2617

 

Lab Genetic Counselor: LabGC@seattlechildrens.org

Reference Range

Interpretive report will be provided

Methodology

Method: Bi-directional sequencing of all exons and exon-intron boundaries.  Deletion/duplication of MECP2 is performed by MLPA.

 

Limitations: Mutations in the promoter region or rare recombinant mutations may not be detected by this method.

CPT Codes

81302, 81304

Special Instructions

Links to: MECP2-Related Disorders GeneReviews

Requisition

Molecular Genetics

Clinical Utility

Rett Syndrome is a neurodevelopmental disorder with a range of phenotypes including: Classic Rett syndrome, Atypical Rett syndrome, and mild learning disabilities. It is characterized by a rapid regression in language and motor skills, followed by long-term stability. During the phase of rapid regression, repetitive, stereotypic hand movements replace purposeful hand use. It affects approximately 1/10,000 to 1/15,000 females and is the most common genetic cause of intellectual disability in females.

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