Uroporphyrinogen decarboxylase, whole blood-994

Test info

  
Uroporphyrinogen decarboxylase, whole blood
  
994
  
LAB994
  
MSO
  
Erythrohepatic Uroporphyria (EHUP)
Hepatoerythropoietic Porphyria (HEP)
Porphyria Cutanea Tarda (PCT)
  

Preferred test for the confirmation of a diagnosis of porphyria cutanea tarda type II and hepatoerythropoietic porphyria.

Specimen

  

Patient should abstain from alcohol for 24 hours.

Abstinence is essential for at least 24 hours as alcohol suppresses enzyme activity for 24 hours after ingestion.

  
Sodium heparin (Na hep) whole blood
  
  
4.0 mL
  
3.0 mL
  

Dk green Sodium heparin (Na hep), no gel

  
EDTA whole blood
Lithium heparin (Li hep) whole blood
  

Lavender (EDTA), 4mL

Dk green Lithium heparin (Li hep), no gel

  

Refrigerated (preferred) – 14 days

Ambient – 7 days

Frozen – NO

  
2 weeks
  

Gross hemolysis

Performance

  
Mayo (UPGD): R-NX
  
Tu, Th
  
6 days
  

High-Performance Liquid Chromatography (HPLC)/Incubation of lysed erythrocytes

Clinical and Interpretive info

  

≥1.0 Relative units (RU) - normal

0.80 - 0.99 Relative units (RU) - indeterminate

<0.80 Relative units (RU) - indicative of PCT type II

 

  
Alcohol ingestion within 24 hours of specimen collection may lead to a false-positive result.

Billing

  
82657

Tracking

  
07/23/2021
  
07/26/2021
  
07/23/2021