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Test Code MPLVS MPL Exon 10 Mutation Detection, Varies

Reporting Name

MPL Exon 10 Mutation Detection, V

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Aiding in the distinction between a reactive cytosis and a myeloproliferative neoplasm

Method Name

Sanger Sequencing


Specimen Required


Submit only 1 of the following specimens:

 

Specimen Type: Peripheral blood

Container/Tube: Lavender top (EDTA) or yellow top (ACD)

Specimen Volume: 3 mL

Collections Instructions:

1. Invert several times to mix blood.

2. Send specimen in original tube. Do not aliquot.

3. Label specimen as blood.

Specimen Stability: Ambient (preferred)/Refrigerate

 

Specimen Type: Bone marrow

Container/Tube: Lavender top (EDTA) or yellow top (ACD)

Specimen Volume: 2 mL

Collections Instructions:

1. Invert several times to mix bone marrow.

2. Send specimens in original tube. Do not aliquot.

3. Label specimen as bone marrow.

Specimen Stability: Ambient (preferred)/Refrigerate

 

Specimen Type: Extracted DNA from blood or bone marrow

Container/Tube: 1.5- to 2- mL tube

Specimen Volume: Entire specimen

Collection Instructions: Label specimen as extracted DNA from blood or bone marrow and provide indication of volume and concentration of DNA.

Specimen Stability Information: Frozen (preferred)/Refrigerated/Ambient


Specimen Type

Varies

Specimen Minimum Volume

Blood, Bone marrow: 0.5 mL; Extracted DNA: 50 mcL at 20 ng/mcL concentration

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Varies 7 days

Reject Due To

Gross hemolysis Reject
Bone marrow biopsies
Slides
paraffin shavings
Moderately to severely clotted		 Reject

Reference Values

An interpretive report will be provided.

Interpretation

The results will be reported as 1 of 2 states:

-Negative for MPL exon 10 variant

-Positive for MPL exon 10 variant

If the result is positive, a description of the variant at the nucleotide level and the altered protein sequence is reported.

 

Positive variant status is highly suggestive of a myeloproliferative neoplasm but must be correlated with clinical and other laboratory features for a definitive diagnosis. Negative variant status does not exclude the presence of a myeloproliferative or other neoplasm.

Day(s) Performed

Monday through Friday

Report Available

5 to 8 days

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

81339-MPL (myeloproliferative leukemia virus oncogene, thrombopoietin receptor, TPOR) (eg, myeloproliferative disorder), exon 10 sequence

LOINC Code Information

Test ID Test Order Name Order LOINC Value
MPLVS MPL Exon 10 Mutation Detection, V 62948-5

 

Result ID Test Result Name Result LOINC Value
MP051 Specimen Type 31208-2
602600 Interpretation 69047-9
602601 Signing Pathologist 19139-5

Forms

If not ordering electronically, complete, print, and send a Hematopathology/Cytogenetics Test Request (T726) with the specimen.