• Test Code:
    1230
  • Department:
    Molecular Genetics
  • Test Synonyms:
    Sequencing for Known MutationsFamilial MutationFamilial Variant
  • CPT Code(s):
    81479(Misc Gene)81202(APC)81215(BRCA1)81217(BRCA2)81221(CFTR)81253(GJB2)81303(MECP2)81293(MLH1)81296(MSH2)81299(MSH6)81326(PMP22)81322(PTEN)81403(SMN1)
Background:

In cases of known familial mutations in specific genes, our laboratory will perform targeted mutation analysis.

Methodology:

Direct Sanger sequencing will be performed based on the specific mutation.

Specimen Requirements:

Blood: EDTA or ACD (solution A or B)

  • Adult: 8.5 mL
  • Child: 5 mL
  • Infant: 2-3 mL

Saliva: 2 ORAgene Saliva Kits (ORG-500) used according to manufacturer instructions.  Please contact KDL Client Services for a Saliva Collection Kit for patients that cannot provide a blood sample.

Assisted Saliva: 4 ORAgene Assisted Saliva Kits (ORG-575) used according to manufacturer instructions.  Please contact KDL Client Services for a Saliva Collection Kit for patients that cannot provide a blood sample.

Buckle Cells: 4 CytoSoft™ Cytology Brush (Medical Packaging CYB-1) used according to manufacturer instructions.  Please contact KDL Client Services for a Buccal Collection Kit for patients that cannot provide a blood sample.

Skin Fibroblast: Punch Biopsy, or 2 T-25 confluent flasks

Prenatal:

  • Direct Amniotic Fluid (10-20mL)
  • Direct CVS
  • Direct POC
  • Cultured Amniocytes (2-T25 flasks)
  • Cultured CVS (2-T25 flasks)
  • Cultured Fetal Tissue: Product of Conception (2 T-25 flasks)
  • Cord Blood (1-2mL)

DNA: 1-2µg at a minimum of 100ng/µL (DNA must be extracted in a CLIA-certified laboratory or a laboratory meeting equivalent requirements as determined by the CAP and/or CMS)

Notice Regarding Molecular Genetic Testing Prenatal Specimens:

  • Maternal cell rule-out testing will be performed on all prenatal specimens received. Please provide maternal blood in addition to the fetal specimen. Additional charges apply for the maternal cell rule-out test.

For routine testing of blood, saliva and buccal swabs, KDL does NOT accept samples from patients within two (2) weeks of a packed cell/platelet transfusion or within four (4) weeks of a whole blood transfusion.  For extraordinary circumstances, where testing must be performed within the above windows, please contact our lab.

A REQUISITION FORM MUST ACCOMPANY ALL SAMPLES.  Please include detailed clinical information, including ethnicity, clinical history, and family history.

Test Performed (Days):

Weekly

Turn Around Time:

14 - 21 Days

Shipment Sensitivity Requirements:

  • Package and ship specimen to remain cold, but not frozen. 
  • Ship via overnight express, using the FedEx priority overnight label provided. 
  • Contact Client Services for shipping kits and instructions at (855) 535-1522.

References:

Additional Info:

Please note on the requisition form the specific mutation(s) for which testing is requested; also note other family members tested in our laboratory and report numbers if known.  If testing was performed on the proband (affected family member) outside of our laboratory, please include a copy of that clinical report.