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The quantitative real-time PCR assay detects V617F mutation (c.1849 G>T) observed in approximately 95% polycythemia vera (pv), 55% essential thrombocythemia (ET), and 55% primary myelofibrosis (PMF). It is also infrequently present (3% to 5%) in myelodysplastic syndrome, chronic myelomonocytic leukemia, and other atypical chronic myeloid disorders. The results should be interpreted in the context of all clinical and laboratory findings. No therapeutic action should be taken based solely on these results.
This assay detects only the JAK2V617F point mutation. Other mutations that may occur in the JAK2 gene will not be detected. In vitro studies have indicated that this assay has an analytical sensitivity of 1%. This test was developed, and its performance characteristics determined, by LabCorp. It has not been cleared or approved by the US Food and Drug Administration (FDA).
Total genomic DNA was extracted and subjected to TaqMan® real-time PCR amplification/detection. Two amplification products per sample were monitored by real-time PCR using primers/probes specific to JAK2 wild type (WT) and JAK2 mutant V617F. The ABI7900 Absolute Quantitation software will compare the patient specimen values to the standard curves and generate percent values for wild type and mutant type. The numerical values of sample Mutant Quantity/(Sample Mutant Quantity + Sample Wild Type Quantity) X100 is reported as a percentage.
Whole blood or bone marrow
3 to 5 mL whole blood or 1 to 2 mL bone marrow
3 mL whole blood or 1 mL bone marrow
Submit at room temperature. Specimen should arrive at the testing laboratory within 48 hours of collection. Indicate the date and time of collection on the test request form.
Causes for Rejection
Sample more than 72 hours old; frozen whole blood, serum or bone marrow; leaking tube; clotted blood or bone marrow; grossly hemolyzed specimen or otherwise visibly degraded or unsuitable; specimens containing suspicious foreign material
Please provide indications for JAK2 testing and specimen type. Direct any questions regarding this test to customer service at 800-345-4363.
|Order Code||Order Code Name||Order Loinc||Result Code||Result Code Name||UofM||Result LOINC|
|481020||JAK2 V617F, Quantitative||480997||Specimen Type:||31208-2|
|481020||JAK2 V617F, Quantitative||480998||Background:||77202-0|
|481020||JAK2 V617F, Quantitative||480999||Methodology:||49549-9|
|481020||JAK2 V617F, Quantitative||481016||References:||75608-0|
|481020||JAK2 V617F, Quantitative||481021||JAK2 V617F Mutation Quant Rslt||43399-5|
|481020||JAK2 V617F, Quantitative||481026||Quantitative Value:||%||53761-3|
|481020||JAK2 V617F, Quantitative||481027||Indications:||42349-1|
|481020||JAK2 V617F, Quantitative||481132||Director Review:||72486-4|
|481020||JAK2 V617F, Quantitative||481481||JAK2 V617F, Quantitative||N/A|