Test Catalog

Test Id : EXHD

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Hematologic Disorders, DNA Extract and Hold, Varies

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Overview

Test Catalog

Useful For
Suggests clinical disorders or settings where the test may be helpful

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
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

DNA will be extracted from the specimen and stored at -80 degrees 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.

Method Name
A short description of the method used to perform the test

Nucleic Acid Extraction

NY State Available
Indicates the status of NY State approval and if the test is orderable for NY State clients.

Yes

Reporting Name
Lists a shorter or abbreviated version of the Published Name for a test

DNA Extract and Hold

Aliases
Lists additional common names for a test, as an aid in searching

DNA Extract and Hold

Nucleic Acid Extraction Only

Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

DNA will be extracted from the specimen and stored at -80 degrees 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.

Specimen Type
Describes the specimen type validated for testing

Varies

ORDER QUESTIONS AND ANSWERS

Question ID Description Answers
MP034 Specimen Type

Specimen Required
Defines the optimal specimen required to perform the test and the preferred volume to complete testing

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.

Special Instructions
Library of PDFs including pertinent information and forms related to the test

Forms

1. Hematopathology Patient Information (T676)

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

Specimen Minimum Volume
Defines the amount of sample necessary to provide a clinically relevant result as determined by the testing laboratory. The minimum volume is sufficient for one attempt at testing.

Blood, Bone Marrow: 1 mL

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

Gross hemolysis Reject
Paraffin-embedded material
Fluids
Heparinized samples 		Reject
 

Specimen Stability Information
Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included

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

Useful For
Suggests clinical disorders or settings where the test may be helpful

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
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

DNA will be extracted from the specimen and stored at -80 degrees 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.

Clinical Information
Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

It is frequently useful to obtain DNA from clinical samples containing a hematopoietic neoplasm at the time of diagnosis so appropriate material is available for molecular analysis should subsequent testing be required. For example, when a diagnosis of acute myelogenous leukemia is made, there is a delay before karyotype information, which determines whether testing for molecular prognostic markers is necessary, is available. After this delay, the diagnostic sample is usually no longer available, or the DNA has degraded to such an extent that it is no longer adequate for testing. Thus, it is useful to obtain DNA on such specimens promptly at diagnosis and retain it until it is known whether additional testing is necessary.

Reference Values
Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

Not applicable

Interpretation
Provides information to assist in interpretation of the test results

A report of "Performed" will be sent and a $50 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.

Cautions
Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

DNA will be held at -80 degrees Celsius for one year from the time of extraction. The DNA may only be used for suitable tests offered by the Molecular Hematopathology Laboratory at Mayo Clinic. It cannot be shipped to another institution for testing and cannot be released for research use.

 

Only liquid blood specimens will be processed. Paraffin-embedded material and fresh, solid tissue will not be accepted at this time.

Method Description
Describes how the test is performed and provides a method-specific reference

DNA is extracted using an automated system. The system includes a sample lysis step followed by binding of nucleic acid to a solid phase for separation from other cellular components and a final nucleic acid elution step.

PDF Report
Indicates whether the report includes an additional document with charts, images or other enriched information

No

Day(s) Performed
Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day.

Monday through Saturday

Report Available
The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing.

5 days

Specimen Retention Time
Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

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

Performing Laboratory Location
Indicates the location of the laboratory that performs the test

Rochester

Fees :
Several factors determine the fee charged to perform a test. Contact your U.S. or International Regional Manager for information about establishing a fee schedule or to learn more about resources to optimize test selection.

  • Authorized users can sign in to Test Prices for detailed fee information.
  • Clients without access to Test Prices can contact Customer Service 24 hours a day, seven days a week.
  • Prospective clients should contact their account representative. For assistance, contact Customer Service.

Test Classification
Provides information regarding the medical device classification for laboratory test kits and reagents. Tests may be classified as cleared or approved by the US Food and Drug Administration (FDA) and used per manufacturer instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR) product.

Not Applicable

LOINC® Information
Provides guidance in determining the Logical Observation Identifiers Names and Codes (LOINC) values for the order and results codes of this test. LOINC values are provided by the performing laboratory.

Test Id Test Order Name Order LOINC Value
EXHD DNA Extract and Hold No LOINC Needed
Result Id Test Result Name Result LOINC Value
Applies only to results expressed in units of measure originally reported by the performing laboratory. These values do not apply to results that are converted to other units of measure.
MP034 Specimen Type 31208-2
41995 DNA Extract and Hold Result No LOINC Needed
38305 DNA Extraction No LOINC Needed

Test Setup Resources

Setup Files
Test setup information contains test file definition details to support order and result interfacing between Mayo Clinic Laboratories and your Laboratory Information System.

Excel | Pdf

Sample Reports
Normal and Abnormal sample reports are provided as references for report appearance.

Normal Reports | Abnormal Reports

SI Sample Reports
International System (SI) of Unit reports are provided for a limited number of tests. These reports are intended for international account use and are only available through MayoLINK accounts that have been defined to receive them.

SI Normal Reports | SI Abnormal Reports