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Test Code EXHD Hematologic Disorders, DNA Extract and Hold, Varies

Useful For

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

Testing Algorithm

DNA will be extracted from the specimen and stored at -80° Celsius for one year from the date of the extraction process was performed. A report of "Performed" will be sent and a $50.00 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.

Reporting Name

DNA Extract and Hold

Specimen Type

Varies


Specimen Required


Specimen must arrive within 7 days of collection. Collect and package specimen as close to shipping time as possible.

 

Submit only 1 of the following specimens:

 

Specimen Type: Blood

Container/Tube:

Preferred: Lavender top (EDTA)

Acceptable: Yellow top (ACD)

Specimen Volume: 4 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: 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 Minimum Volume

Blood, Bone Marrow: 1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Ambient (preferred) 7 days PURPLE OR PINK TOP/EDTA
  Refrigerated  7 days 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

Specimen Retention Time

Blood/Bone marrow: 2 weeks; Extracted DNA:1 year

Performing Laboratory

Mayo Clinic Laboratories in Rochester

LOINC Code Information

Result ID Test Result Name Result LOINC Value
MP034 Specimen Type 31208-2
41995 DNA Extract and Hold Result No LOINC Needed
38305 DNA 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.