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Test Code DPYDG Dihydropyrimidine Dehydrogenase, DPYD Full Gene Sequencing, Varies

Secondary ID

65213

Useful For

Identifying individuals at increased risk of toxicity when considering 5-fluorouracil and capecitabine chemotherapy treatment

 

May be useful in identifying variants associated with decreased or absent dihydropyrimidine dehydrogenase enzyme activity for an individual with this deficiency suspected

Method Name

Polymerase Chain Reaction (PCR) followed by DNA Sequence Analysis

Reporting Name

DPYD Full Gene Sequencing

Specimen Type

Varies


Ordering Guidance


 



Specimen Required


Multiple whole blood EDTA genotype tests can be performed on a single specimen after a single extraction. See Multiple Whole Blood EDTA Genotype Tests in Special Instructions for a list of tests that can be ordered together.

 

Submit only 1 of the following specimens:

 

Specimen Type: Whole blood

Container/Tube: Lavender top (EDTA)

Specimen Volume: 3 mL

Collection Instructions:

1. Invert several times to mix blood.

2. Send specimen in original tube.

Specimen Stability Information: Ambient (preferred) 9 days/Refrigerated 30 days

 

Specimen Type: Saliva

Patient Preparation: Patient should not eat, drink, smoke, or chew gum 30 minutes prior to collection.

Supplies: Saliva Swab Collection Kit (T786)

Specimen Volume: 1 swab

Collection Instructions: Collect and send specimen per kit instructions.

Specimen Stability Information: Ambient 30 days

 

Specimen Type: Extracted DNA

Container/Tube: 2 mL screw top tube

Specimen Volume: 100 mcL (microliters)

Collection Instructions:

1. The preferred volume is 100 mcL at a concentration of 250 ng/mcL.

2. Include concentration and volume on tube.

Specimen Stability Information: Frozen (preferred)/Ambient/Refrigerated


Specimen Minimum Volume

Blood: 0.45 mL
Saliva: 1 swab

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Varies

Reject Due To

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Reference Values

An interpretive report will be provided.

Day(s) Performed

Varies

Report Available

5 to 10 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

81232

LOINC Code Information

Test ID Test Order Name Order LOINC Value
DPYDG DPYD Full Gene Sequencing 94198-9

 

Result ID Test Result Name Result LOINC Value
48263 DPYD Predicted Toxicity Risk 83009-1
48264 Result Details 82939-0
48268 Interpretation 69047-9
48266 Method 49549-9
48269 Disclaimer 62364-5
48270 Reviewed by 18771-6
92011 Additional Information 48767-8

Forms

1. New York Clients-Informed consent is required. Document on the request form or electronic order that a copy is on file. The following documents are available in Special Instructions:

-Informed Consent for Genetic Testing (T576)

-Informed Consent for Genetic Testing (Spanish) (T826)

2. If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) form with the specimen.