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Test Code CXLPL CXCR4 Mutation Analysis, Somatic, Lymphoplasmacytic Lymphoma/Waldenstrom Macroglobulinemia, Varies


Shipping Instructions


Whole blood or bone marrow specimens must arrive within 10 days of collection.



Necessary Information


The following information is required:

1. Pertinent clinical history

2. Clinical or morphologic suspicion

3. Date and time of collection

4. Specimen source



Specimen Required


Submit only 1 of the following specimens:

 

Preferred

Specimen Type: Whole blood

Container/Tube:

Preferred: Lavender top (EDTA)

Acceptable: Yellow top (ACD)

Specimen Volume: 3 mL

Collection Instructions:

1. Invert several times to mix blood.

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

3. Label specimen as blood.

Specimen Stability Information: Ambient (preferred)/Refrigerated

 

Specimen Type: Bone marrow aspirate

Container/Tube:

Preferred: Lavender top (EDTA)

Acceptable: Yellow top (ACD)

Specimen Volume: 2 mL

Collection Instructions:

1. Invert several times to mix bone marrow.

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

3. Label specimen as bone marrow.

Specimen Stability Information: Ambient (preferred)/Refrigerated

 

 Acceptable

Specimen Type: Extracted DNA from blood or bone marrow

Container/Tube: 1.5- to 2-mL tube

Specimen Volume: Entire specimen

Collection Instructions:

1. Label specimen as extracted DNA from blood or bone marrow

2. Provide volume and concentration of the DNA

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

 

Specimen Type: Paraffin-embedded tissue

Container/Tube: Paraffin block

Specimen Stability Information: Ambient

 

Specimen Type: Tissue

Slides: Unstained slides

Specimen Volume: 10 to20 slides

Additional Information: Tissue must demonstrate involvement by a hematologic neoplasm (eg, acute myelocytic leukemia), not solid tumors.

Specimen Stability Information: Ambient


Forms

1. Hematopathology Patient Information (T676)

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

Useful For

Aiding in the prognosis and clinical management of lymphoplasmacytic lymphoma/Waldenstrom macroglobulinemia

Genetics Test Information

This test detects gene mutations within the C-terminal end of the CXCR4 gene that are commonly found in association with MYD88 L265P mutations in cases of lymphoplasmacytic lymphoma/Waldenstrom macroglobulinemia.

Reporting Name

CXCR4 Mutation in B-cell Lymphoma

Specimen Type

Varies

Specimen Minimum Volume

Whole blood, Bone marrow: 1 mL
Extracted DNA: at least 50 mcL with a concentration of at least 20 nanograms per mcL
Other specimen types: See Specimen Required

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Varies 10 days

Reject Due To

Gross hemolysis Reject
B5-fixed tissues
Decalcified bone marrow core biopsies
Frozen tissue
Methanol acetic acid (MAA)-fixed pellets
Moderately to severely clotted
Paraffin shavings		 Reject

Reference Values

Mutations present or absent in the test region c. 898-1059 (amino acids 300-353) of the CXCR4 gene (NCBI NM_003467.2, GRCh37)

Day(s) Performed

Monday through Friday

Report Available

7 to 10 days

Specimen Retention Time

Blood/Bone marrow: 2 weeks; Extracted DNA: 3 months

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

81479-Unlisted molecular pathology procedure

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CXLPL CXCR4 Mutation in B-cell Lymphoma In Process

 

Result ID Test Result Name Result LOINC Value
MP032 Specimen Type 31208-2
113436 CXLPL Result 59465-5
38287 Final Diagnosis 50398-7