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HelpTest Code CALX CALR Mutation Analysis, Myeloproliferative Neoplasm (MPN), Reflex, Varies
Reporting Name
CALR, Gene Mutation, Exon 9, ReflexSpecimen Type
VariesSpecimen Required
Only orderable as a reflex. For more information see MPNR / Myeloproliferative Neoplasm, JAK2 V617F with Reflex to CALR and MPL, Varies.
Specimen Minimum Volume
Blood and Bone Marrow: 1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Varies | Varies | 7 days |
Reference Values
Only orderable as a reflex. For more information see MPNR / Myeloproliferative Neoplasm, JAK2 V617F with Reflex to CALR and MPL, Varies.
An interpretive report will be provided.
Specimen Retention Time
Whole blood, bone marrow: 2 weeks; Extracted DNA 3 monthsPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
81219-CALR (calreticulin) (eg, myeloproliferative disorders), gene analysis, common variants in exon 9
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| CALX | CALR, Gene Mutation, Exon 9, Reflex | 77174-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 36998 | Final Diagnosis | 22637-3 |
Useful For
Aiding in the distinction between a reactive cytosis and a chronic myeloproliferative disorder
Evaluating mutations in CALR in an algorithmic process for the MPNR / Myeloproliferative Neoplasm, JAK2 V617F with Reflex to CALR and MPL, Varies
Reject Due To
| Gross hemolysis | Reject |
| Paraffin embedded bone marrow aspirate clot or biopsy blocks, slides, paraffin shavings Moderately to severely clotted |
Reject |
Day(s) Performed
Monday through Friday