ABL Kinase Domain Mutation in CML, Cell-based

Test Code
16029

CPT Codes
81170

Preferred Specimen
2.1 mL bone marrow collected in an EDTA (lavender-top) tube

Minimum Volume

1 mL



Other Acceptable Specimens
6 mL whole blood collected in an EDTA (lavender-top), sodium heparin (green-top), ACD solution B (yellow-top) tube

Instructions
After collection of the specimen, draw date and time, as well as specimen type, must be written on the tube and included as requested information.

Ship specimen immediately due to short specimen stability of 72 hours
. If the stability of the specimen can not be determined, delay in result or cancellation of test may occur.


Transport Temperature
Refrigerated (cold packs)

Specimen Stability
Room temperature: 72 hours
Refrigerated: 72 hours
Frozen: Unacceptable


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Grossly hemolyzed • Lipemic • Frozen samples • Clotted whole blood samples • Clotted bone marrow samples



Methodology
Nested Polymerase Chain Reaction • Real-Time Polymerase Chain Reaction (RT-PCR) • Sequencing

This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics, VA. It has not been cleared or approved by the FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Reference Range
See Laboratory Report

Clinical Significance
Imatinib mesylate (ST1571;Gleevec) is a selective BCR-ABL kinase inhibitor, effective in the treatment of chronic myelogenous leukemia (CML). Most patients in chronic phase maintain durable responses; however, many in blast crisis fail to respond, or relapse quickly. ABL kinase domain mutations are the most commonly identified mechanism associated with relapse. The molecular monitoring in the first few months of therapy may play a crucial role in detecting patients at high risk of Imatinib resistance. This ABL kinase mutation assay may detect drug-resistant mutations before clinical relapse and identify candidate suitable for alternative therapy.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153




The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.