Porphyrins, 24-hour stool-994

Test info

  
Porphyrins, 24-hour stool
  
994
  
LAB994
  
MSO
  

Evaluation of patients who present with signs or symptoms suggestive of porphyria cutanea tarda, hereditary coproporphyria, variegate porphyria, congenital erythropoietic porphyria, erythropoietic protoporphyria, or X-linked dominant protoporphyria.

  

 Specimens smaller than 100 g may not provide interpretable results

Specimen

  
  • Patient should be instructed to refrain from red meat and aspirin-containing medications for 3 days prior to, as well as during, specimen collection.
  • No barium, laxatives, or enemas may be used within 24 hours of starting the collection.
  
Stool, timed collection (48, 72 or 96-hr)
  
  
100 g
  
10 g
  
  • Use as many containers as necessary
  • Label all containers X of X (eg. 1 of 2, 2 of 2)
  

Freeze

Submit all containers

  

Mayo stool collection jar

  
  • Length of collection period is required
  • Include a list of medications the patient is currently taking
  • Indicate patient compliance of diet/medications recommendations listed in patient preparation
  

Frozen (preferred) - 14 days

Refrigerated - 14 days

  
1 week

Performance

  
Mayo Clinic Laboratories (FQPPS): R-MM
  
Tu, Th
  
7 - 11 days
  

High-Performance Liquid Chromatography (HPLC)

Porphyrins are quantified by fluorescence

Clinical and Interpretive info

  

See report

Billing

  
84126

Tracking

  
11/30/2001
  
01/28/2022
  
12/20/2021