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Test Code LAB000 - Enter Specimen type, Source, and Test Name Hematologic Disorders, DNA and RNA Extract and Hold, Varies

Additional Codes

Mayo test code: EXHR

Useful For

Reserving nucleic acids on any specimen for which molecular analysis requiring DNA or RNA may be necessary at a future date, ensuring that adequate material for testing is available

Testing Algorithm

DNA and RNA will be extracted from the specimen and stored at -80° Celsius for one year from the date the extraction process was performed. A report of "Performed" will be sent and a $75.00 processing fee will be assessed. To request molecular testing from the Molecular Hematopathology Laboratory's test menu, call 800-533-1710. Additional charges will be assessed for testing performed.

 

For more information see Eosinophilia: Bone Marrow Diagnostic Algorithm.

Method Name

Nucleic Acid Extraction

Reporting Name

DNA and RNA Extract and Hold

Specimen Type

Varies


Shipping Instructions


Refrigerate specimens must arrive within 5 days of collection, and ambient specimens must arrive with 3 days (72 hours) of collection. Collect and package specimens as close to shipping time as possible.



Specimen Required


Submit only 1 of the following specimens:

 

Specimen Type: Blood

Container/Tube:

Preferred: Lavender top (EDTA)

Acceptable: Yellow top (ACD)

Specimen Volume: 10 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 Type: Bone marrow

Container/Tube:

Preferred: Lavender top (EDTA)

Acceptable: Yellow top (ACD)

Specimen Volume: 4 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 Minimum Volume

Blood: 8 mL
Bone Marrow: 2 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Refrigerated (preferred) 5 days PURPLE OR PINK TOP/EDTA
  Ambient  72 hours PURPLE OR PINK TOP/EDTA

Reject Due To

Gross hemolysis Reject
Paraffin-embedded material
Fluids
Heparinized samples		 Reject

Reference Values

Not applicable

Day(s) Performed

Monday through Saturday

Report Available

5 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

LOINC Code Information

Result ID Test Result Name Result LOINC Value
MP035 Specimen Type 31208-2
41938 DNA/RNA Extract and Hold Result No LOINC Needed
41937 DNA/RNA Extraction No LOINC Needed

Test Classification

Not Applicable

Forms

1. Hematopathology Patient Information (T676)

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