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Orderable Name PUPYP Purines and Pyrimidines Panel, Plasma


Ordering Guidance


The preferred test to rule-out inherited disorders of purine and pyrimidine metabolism is PUPYU / Purines and Pyrimidines Panel, Random, Urine.

 

This test does not evaluate succinyladenosine. If succinyladenosine analysis is needed, order PUPYU / Purines and Pyrimidines Panel, Random, Urine.



Necessary Information


Patient's age is required.



Specimen Required


Collection Container/Tube: Lavender top (EDTA)

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions:

1. Centrifuge at 4° C and aliquot plasma into plastic vial.

2. Send plasma frozen.


Useful For

Evaluating patients with symptoms suspicious for disorders of purine and pyrimidine metabolism

 

Monitoring patients with disorders of purine and pyrimidine metabolism

 

Laboratory evaluation of primary and secondary hyperuricemias

 

Assessing tolerance for fluoropyrimidine drugs used in cancer treatment

 

Aiding in the diagnosis of individuals with suspected dihydropyrimidine dehydrogenase deficiency

Method Name

Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)

Specimen Type

Plasma

Specimen Minimum Volume

0.2 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Plasma Frozen 90 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Reference Values

Age range

0-1 years

>1-4 years

5-18 years

>18 years

Uracil

≤2

≤2

≤2

≤2

Thymine

≤2

≤2

≤2

≤2

Adenine

≤3

≤3

≤3

≤3

Hypoxanthine

≤35

≤17

≤15

≤15

Xanthine

≤6

≤6

≤6

≤3

Dihydroorotic

≤2

≤2

≤2

≤2

Uric Acid

100-450

150-500

150-500

150-500

Deoxythymidine

≤2

≤2

≤2

≤2

Deoxyuridine

≤2

≤2

≤2

≤2

Uridine

≤14

≤9

≤9

≤9

Deoxyinosine

≤2

≤2

≤2

≤2

Deoxyguanosine

≤2

≤2

≤2

≤2

Inosine

≤2

≤2

≤2

≤2

Guanosine

≤2

≤2

≤2

≤2

Dihydrouracil

≤3

≤3

≤3

≤3

Dihydrothymine

≤2

≤2

≤2

≤2

N-carbamoyl- beta-alanine

≤2

≤2

≤2

≤2

N-carbamoyl- beta-aminoisobutryic acid

≤2

≤2

≤2

≤2

 

All results reported as nmol/mL

Day(s) Performed

Tuesday

Report Available

3 to 9 days

CPT Code Information

82542