May be useful when essential thrombocythemia or idiopathic myelofibrosis is suspected in JAK2 V617F-negative individuals.
Assay: Varies
- Patient Preparation
- Collect
- Lavender (EDTA).
- Specimen Preparation
- Transport 5 mL whole blood or bone marrow. (Min: 1 mL)
- Storage/Transport Temperature
- Refrigerated.
- Unacceptable Conditions
- Plasma or serum. Specimens collected in anticoagulants other than EDTA. Clotted or grossly hemolyzed specimens.
- Remarks
- Stability
- Ambient: 24 hours; Refrigerated: 5 days; Frozen: Unacceptable
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
2005546 | MPL codon 515 results | 58009-2 |
- JAK-2 negative MPN diagnosis
- JAK2 V617 negative testing
- MPL 1p34