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Test Code 0288902 JAK2 V617F Mutation Detection, Blood

Additional Codes

Mayo Test ID
JAK2B

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Aiding in the distinction between a reactive blood cytosis and a chronic myeloproliferative disorder in blood specimens

Testing Algorithm

The following algorithms are available in Special Instructions:

-Erythrocytosis Evaluation Testing Algorithm

-Myeloproliferative Neoplasm: A Diagnostic Approach to Peripheral Blood Evaluation

Method Name

Point Mutation Detection in DNA Using Quantitative Polymerase Chain Reaction (PCR)

Reporting Name

JAK2 V617F Mutation Detection, B

Specimen Type

Whole Blood EDTA


Shipping Instructions


Specimen must arrive within 7 days (168 hours) of draw.



Specimen Required


Container/Tube:

Preferred: EDTA (lavender top)

Acceptable: ACD (yellow top)

Specimen Volume: 4 mL

Collection Instructions:

1. Invert several times to mix blood.

2. Send specimen in original tube.


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time
Whole Blood EDTA Ambient (preferred) 7 days
  Refrigerated  7 days

Reject Due To

Hemolysis

Mild OK; Gross reject

Lipemia

NA

Icterus

NA

Other

Moderately to severely clotted

Reference Values

An interpretive report will be provided.

Interpretation

The results will be reported as 1 of the 2 states:

-Negative for JAK2 V617F mutation

-Positive for JAK2 V617F mutation

 

Positive mutation status is highly suggestive of a myeloid neoplasm, but must be correlated with clinical and other laboratory features for definitive diagnosis.

 

Negative mutation status does not exclude the presence of a myeloproliferative neoplasm or other neoplasm.

 

Results below the laboratory cutoff for positivity are of unclear clinical significance at this time.

Day(s) and Time(s) Performed

Monday through Friday; 12 p.m.

Analytic Time

2 days

Specimen Retention Time

DNA stored for 3 months

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

81270-JAK2 (Janus kinase 2) (eg, myeloproliferative disorder) gene analysis, p.Val617Phe (V617F) variant

LOINC Code Information

Test ID Test Order Name Order LOINC Value
JAK2B JAK2 V617F Mutation Detection, B 43399-5

 

Result ID Test Result Name Result LOINC Value
39722 JAK2 Result 53761-3
29590 JAK2 V617F Mutation Detection, B 43399-5

Forms

1. Hematopathology Patient Information (T676) in Special Instructions

2. If not ordering electronically, complete, print, and send a Hematopathology/Cytogenetics Test Request (T726) with the specimen.