Referred Tests
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| Email: | mcl@mayo.edu |
| Telephone: | 800-533-1710 |
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Test ID: PQNU
Porphyrins, Quantitative, 24 Hour, Urine
Useful For 
Suggests clinical disorders or settings where the test may be helpful
Preferred screening test for congenital erythropoietic porphyria and porphyria cutanea tarda and during symptomatic periods for acute intermittent porphyria, hereditary coproporphyria, and variegate porphyria when specimen transport will be longer than 72 hours
Genetics Test Information Provides information that may help with selection of the correct genetic test or proper submission of the test request
This test is preferred during symptomatic periods for acute intermittent porphyria (AIP), hereditary coproporphyria (HCP), and variegate porphyria (VP) when specimen transport will be longer than 72 hours. If the specimen will be received at Mayo Clinic Laboratories within 72 hours of collection, PQNRU / Porphyrins, Quantitative, Random, Urine is recommended.
Testing includes porphobilinogen, which is useful in the evaluation of the acute porphyrias.
This is the preferred test to begin assessment for congenital erythropoietic porphyria (CEP) and porphyria cutanea tarda (PCT).
Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
The following algorithms are available in Special Instructions:
-Porphyria (Acute) Testing Algorithm
-Porphyria (Cutaneous) Testing Algorithm
Special Instructions Library of PDFs including pertinent information and forms related to the test
Method Name A short description of the method used to perform the test
High-Performance Liquid Chromatography (HPLC) with Fluorometric Detection
Includes quantitation of coproporphyrins, uroporphyrins, and intermediate porphyrins (heptacarboxyl, hexacarboxyl, and pentacarboxyl).
Includes liquid chromatography-tandem mass spectrometry (LC-MS/MS) determination of porphobilinogen.
NY State Available Indicates the status of NY State approval and if the test is orderable for NY State clients.
Reporting Name Lists a shorter or abbreviated version of the Published Name for a test
Aliases Lists additional common names for a test, as an aid in searching
Congenital Erythropoietic Porphyria (CEP)
Coproporphyrin
Hereditary Coproporphyria (HCP)
PBG (Porphobilinogen)
Porphyria Cutanea Tarda (PCT)
Porphyrins, Fractionation, Urine
Uroporphyrin
Variegate Porphyria (VP)