Web: | mayocliniclabs.com |
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Email: | mcl@mayo.edu |
Telephone: | 800-533-1710 |
International: | +1 855-379-3115 |
Values are valid only on day of printing. |
Aiding in the distinction between a reactive cytosis and a chronic myeloproliferative disorder
Evaluating for variants in JAK2, CALR, and MPL genes in an algorithmic process
Test ID | Reporting Name | Available Separately | Always Performed |
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CALX | CALR, Gene Mutation, Exon 9, Reflex | No, (bill only) | No |
MPLR | MPL Exon 10 Mutation Detection, R | No, (bill only) | No |
This reflex test sequentially evaluates for the common major gene variants associated with non-BCR-ABL1-positive myeloproliferative neoplasms until a variant is identified. The testing sequence is based on the reported frequency of gene variants in this disease group. Initial testing evaluates for the presence of the JAK2 V617F variant. If this result is negative or very low positive (0.06%-0.6%), testing proceeds with assessment for CALR gene variants. If the CALR result is also negative, then testing proceeds to evaluate for variants in exon 10 of the MPL gene. If either JAK2 V617F (>0.6%) or CALR variants are detected in the process, the testing algorithm ends; therefore, the complete reflex is followed only in the event of sequential negative variant. An integrated report is issued with the summary of test results.
The following algorithms are available in Special Instructions:
-Myeloproliferative Neoplasm: A Diagnostic Approach to Bone Marrow Evaluation
-Myeloproliferative Neoplasm: A Diagnostic Approach to Peripheral Blood Evaluation
Point Mutation Detection in DNA using Quantitative Polymerase Chain Reaction (PCR)