The Collagen Diagnostic Laboratory (CDL) offers targeted testing for previously identified sequence variants in a variety of genes.
“Known mutation/variant testing” should be selected on our test requisition form if a sequence variant was previously identified in the family by the CDL (we tested an affected relative of the patient) or by another laboratory. Known mutation/variant testing may also be ordered for individuals who wish to have clinical laboratory confirmation of variants identified through research laboratories.
Please contact our laboratory genetic counselor (Dru Leistritz, MS, CGC, phone: 206-543-5464, firstname.lastname@example.org) in advance before submitting a request to test for a variant in a gene not on the CDL test menu. For non-CDL genes, we ask for:
- A positive control (there will be no charge to test the positive control)
- A copy of the original mutation/variant report
- As much advance notice as possible
Turn-around time (TAT) is 7-10 business days for variants in genes on the CDL test menu, and 10-14 business days for variants in other genes.
Sanger Sequencing: The coding exon and flanking intron sequences known to contain the variant are amplified by PCR in a single reaction and then sequenced by automated sequencing.
BLOOD IS PREFERRED.
BLOOD: 2 EDTA (purple top) tubes
Whole blood may be stored up to 5-7 days in the refrigerator before shipping.
Single site (known familial mutation or variant): 1 µg DNA
Oragene Saliva samples are accepted
Amniocytes or Cultured CVS Cells: Two confluent T-25 flasks of cultured amniocytes or CVS cells, well-labeled as Prenatal Sample. Please call ahead to notify the CDL that a prenatal sample will be coming.
For known familial mutations, please provide a copy of the original mutation report if testing was not completed at our laboratory.
If testing was not completed at our laboratory, and a positive control sample is available, there will be no charge to test any samples used as positive controls.
Ship sample at room temperature with overnight delivery.
CPT Code & Cost
Known Mutation Testing of COL1A1, COL1A2, TGFBR1, TGFBR2, FBN1 and ACTA2
|81403||Targeted mutation analysis for familial or known mutation, single exon|
Known mutation testing of all other genes
|81479||Targeted mutation analysis for familial or known mutation, single exon|