Hereditary Erythrocytosis Mutations
Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.
This evaluation is recommended for patients presenting with lifelong erythrocytosis, usually with a positive family history of similar symptoms. Polycythemia vera should be excluded prior to testing as it is much more common than hereditary erythrocytosis and can be present even in young patients. A JAK2 V617F or JAK2 exon 12 mutation should not be present. Additionally, p50 testing should be performed and a normal result confirmed before ordering this test. For a complete evaluation including p50 testing, hemoglobin electrophoresis testing, and hereditary erythrocytosis mutation analysis in an algorithmic fashion, order REVE / Erythrocytosis Evaluation. Please note that this test (HEMP) is a reflex test for REVE and should not be ordered if REVE is ordered.
See Erythrocytosis Evaluation Testing Algorithm in Special Instructions.
Specimen Type Describes the specimen type needed for testing
This is a third-order test for specific mutations. For a complete evaluation in an algorithmic fashion, order REVE/ Erythrocytosis Evaluation.
Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.
Container/Tube: EDTA (lavender)
Specimen Volume: 3 mL
Collection Instructions: Send specimen in original tube.
1. Erythrocytosis Patient Information (T694) in Special Instructions
2. New York Clients-Informed consent is required. Please document on the request form or electronic order that a copy is on file. An Informed Consent for Genetic Testing (T576) is available in Special Instructions.
3. If not ordering electronically, complete, print, and send a Benign Hematology Test Request Form (T755) with the specimen (http://www.mayomedicallaboratories.com/it-mmfiles/benign-hematology-test-request-form.pdf)
Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.
Mild OK; Gross reject
Mild reject; Gross reject
Mild reject; Gross reject
Moderately to severely clotted
Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.
|Whole blood||Refrigerated||30 days|