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HelpTest Code EXHR Hematologic Disorders, DNA and RNA Extract and Hold, Varies
Reporting Name
DNA and RNA Extract and HoldPerforming Laboratory
Mayo Clinic Laboratories in Rochester
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
Method Name
Nucleic Acid Extraction
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 Type
VariesSpecimen 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
Interpretation
A report of "Performed" will be sent and a $75 processing fee will be assessed. No interpretation will be given. Should the sample be used in future testing, interpretation would be incorporated with the final testing.
Day(s) Performed
Monday through Saturday
Report Available
5 daysTest Classification
Not ApplicableLOINC 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 |
Forms
1. Hematopathology Patient Information (T676)
2. If not ordering electronically, complete, print, and send a Hematopathology/Cytogenetics Test Request (T726) with the specimen.
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.