EXHB - Specimen: Hematologic Disorders, DNA/RNA Extract and Hold, Blood

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Test ID: EXHB    
Hematologic Disorders, DNA/RNA Extract and Hold, Blood

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

DNA and total RNA will be extracted from the specimen and stored at -80 degrees C for 1 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 Laboratories test menu, call 800-533-1710. Additional charges will be assessed for testing performed.

Specimen Type Describes the specimen type needed for testing

Whole blood

Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Specimen must arrive within 72 hours of draw. Draw and package specimen as close to shipping time as possible.


Collection Container/Tube:

Preferred: Lavender top (EDTA)

Acceptable: ACD

Specimen Volume: 4 mL

Collection Instructions:

1. Invert several times to mix blood.

2. Send specimen in original tube.

Additional Information: Date of draw is required.

Forms: If not ordering electronically, complete, print, and send a Hematopathology/Cytogenetics Test Request Form (T726) with the specimen (http://www.mayomedicallaboratories.com/it-mmfiles/hematopathology-request-form.pdf)

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected


Mild OK; Gross reject






Paraffin-embedded material

Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
Whole bloodAmbient (preferred)72 hours
 Refrigerated 72 hours