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HelpTest Code JAKXM JAK2 Exon 12 and Other Non-V617F Mutation Detection, Bone Marrow
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Bone MarrowOrdering Guidance
In all cases being evaluated for JAK2 mutation status, the initial test that should be ordered is JAK2M / JAK2 V617F Mutation Detection, Bone Marrow, a sensitive assay for detection of the mutation. However, if no JAK2 V617F mutation is found, further evaluation of JAK2 may be clinically indicated.
This test is a second-order test that should be ordered when the test for the JAK2M / JAK2 V617F Mutation Detection, Bone Marrow test is negative.
Shipping Instructions
1. Specimen must arrive within 5 days (120 hours) of collection.
2. Draw and package specimen as close to shipping time as possible.
Necessary Information
Date of collection is required.
Specimen Required
Container/Tube:
Preferred: EDTA (lavender top)
Acceptable: ACD (yellow top)
Specimen Volume: 4 mL
Collection Instructions:
1. Invert several times to mix bone marrow.
2. Send specimen in original tube.
Specimen Minimum Volume
2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Bone Marrow | Refrigerated (preferred) | 5 days | PURPLE OR PINK TOP/EDTA |
| Ambient | 5 days | PURPLE OR PINK TOP/EDTA |
Reference Values
An interpretive report will be provided.
Day(s) Performed
Monday through Friday
CPT Code Information
0027U-JAK2 (Janus kinase 2) (eg, myeloproliferative disorder), exon 12 sequence and exon 13 sequence, if performed
Report Available
5 to 8 daysSpecimen Retention Time
RNA 3 monthsReject Due To
| Gross hemolysis | Reject |
| Other | Moderately to severely clotted |